You are viewing the permanent link for the record currently in effect, published 2026-08-21.
Louisville building permits
VerifiedLouisville, Colorado — as published 2026-08-21.
Verified 2026-07-05 · Source
Codes adopted
2024 International Building Code (IBC), effective 12/6/2025 — City of Louisville Building Codes page2024 International Residential Code (IRC), effective 12/6/20252024 International Energy Conservation Code (IECC), effective 12/6/20252024 International Fire Code (IFC), effective 12/6/20252024 International Plumbing Code (IPC), effective 12/6/20252024 International Fuel Gas Code (IFGC), effective 12/6/20252024 International Mechanical Code (IMC), effective 12/6/20252024 International Existing Building Code (IEBC), effective 12/6/20252024 International Property Maintenance Code (IPMC), effective 12/6/20252023 National Electrical Code (NEC), effective 1/5/2024; local amendment NEC 210.8(F) Exception #2 takes effect 9/1/2026 requiring GFCI protection on all new outdoor A/C units1997 Uniform Code for the Abatement of Dangerous Buildings, effective 12/6/20251997 Uniform Housing Code, effective 12/6/2025Colorado Model Electric Ready and Solar Ready Code, effective 12/6/2025Louisville Fire Hardening Code — Ordinance 1884 (series 2024), updated by Ordinance 1891 (series 2025) and Emergency Ordinance 1913 (series 2026, effective 1/21/2026) — sets minimum fire-resistant construction standards for new construction, accessory structures, and repair/replacement of specific home systems (roofing, siding, decks, fencing, vents, gutters) to reduce wildfire spread risk; applies citywide, not limited to a mapped WUI zoneLouisville Municipal Code Chapter 15 — Buildings and Construction (local amendments and adoption-by-reference)Louisville Municipal Code Chapter 5.12 (Section 5.12.090) — Contractor Licensing: any contractor employed on a building project must be licensed with the City of Louisville and listed on the permitPrior to 12/6/2025 the City operated under the 2018 ICC codes; the 2024 ICC code adoption ordinance and effective date are confirmed on the City's Building Codes page
Permit types & fees
Residential Building Permit (New Construction)
VerifiedRequired for construction of new single-family detached or attached homes, multi-family buildings, and mobile homes within the City of Louisville. Reviewed under the 2024 IRC/IBC and Fire Hardening Code by the City's own Building Safety Division.
Verified 2026-07-05 · Source
Requirements
- Plans must comply with the 2024 IRC/IBC as adopted (effective 12/6/2025), the 2023 NEC, and the Louisville Fire Hardening Code (Class A fire-resistant roofing, siding/eave materials, vents, gutters, and — where applicable — fencing/decks)
- Valuation = cost of materials, labor, and profit; minimum valuation determined via the City of Louisville Building Valuation Data Table (cost per sq ft by occupancy group, e.g., R-3 one/two-family = $190.00/sq ft, 2024 table); the higher of stated contract cost or table valuation governs the fee
- All contractors employed on the project must hold a current City of Louisville Contractor License (LMC Sec. 5.12.090) and be listed on the permit before issuance
- All permit submittals must be made electronically through the City's CSS Online Portal
- New single-family/multi-family/mobile home permits fall under the 'Residential Permits' category on the City's published review-time table
Required documents
- RequiredBuilding Permit Application (CSS Online Portal)Submitted through the City's Customer Self Service portal
- Required2024 IRC IECC Plan Review Checklist (Residential)Required plan-review submittal document per the Permit Information page
- RequiredConstruction DrawingsFull plan set reflecting adopted codes and Fire Hardening Code requirements
- RequiredSite PlanProperty lines, setbacks, and all existing/proposed structures
- RequiredFoundation Setback CertificationRequired plan-review submittal document
- RequiredEnergy Rater Checklist (2024 IECC)Required plan-review submittal document
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee — valuation $0.00 to $500.00 | $28.00 (except as provided in Sec. 15.04.060.14(e) LMC for residential permits) | City of Louisville Building Permit Fee Table, Table 4, updated through separate process, no annual inflator applied |
| Building Permit Fee — valuation $501.00 to $2,000.00 | $28.00 for the first $500.00 plus $4.00 for each additional $100.00 or fraction thereof, to and including $2,000.00 | City of Louisville Building Permit Fee Table, Table 4, CC 12/03/24 |
| Building Permit Fee — valuation $2,001.00 to $25,000.00 | $82.00 for the first $2,000.00 plus $16.00 for each additional $1,000.00 or fraction thereof, to and including $25,000.00 | City of Louisville Building Permit Fee Table, Table 4, CC 12/03/24 |
| Building Permit Fee — valuation $25,001.00 to $50,000.00 | $400.00 for the first $25,000.00 plus $12.00 for each additional $1,000.00 or fraction thereof, to and including $50,000.00 | City of Louisville Building Permit Fee Table, Table 4, CC 12/03/24 |
| Building Permit Fee — valuation $50,001.00 to $100,000.00 | $700.00 for the first $50,000.00 plus $8.00 for each additional $1,000.00 or fraction thereof, to and including $100,000.00 | City of Louisville Building Permit Fee Table, Table 4, CC 12/03/24 |
| Building Permit Fee — valuation $100,001.00 to $500,000.00 | $1,000.00 for the first $100,000.00 plus $6.00 for each additional $1,000.00 or fraction thereof, to and including $500,000.00 | City of Louisville Building Permit Fee Table, Table 4, CC 12/03/24 |
| Building Permit Fee — valuation $500,001.00 to $1,000,000.00 | $4,000.00 for the first $500,000.00 plus $5.00 for each additional $1,000.00 or fraction thereof, to and including $1,000,000.00 | City of Louisville Building Permit Fee Table, Table 4, CC 12/03/24 |
| Building Permit Fee — valuation $1,000,001.00 and up | $6,000.00 for the first $1,000,000.00 plus $4.00 for each additional $1,000.00 or fraction thereof | City of Louisville Building Permit Fee Table, Table 4, CC 12/03/24 |
| In-House Plan Review Fee | 65% of the building permit fee | City of Louisville Plan Review and Administration Fees table |
| Development Impact Fees — Single Family (per unit) | $5,915.47 (1,100 sq ft or less) to $12,355.52 (2,001 sq ft or more), tiered by finished floor area; combines Library, Parks & Trails, and Transportation components | How to Calculate Building Fees for New Residential Homes guide, Table A |
| Boulder County Use Tax | 1.185% of 50% of Total Valuation | How to Calculate Building Fees for New Residential Homes, Section F |
| City of Louisville Use Tax | 3.775% of 50% of Total Valuation | How to Calculate Building Fees for New Residential Homes, Section G |
| Sewer Tap Fee — Single Family Residential | $4,600 per unit | City of Louisville Fee Table, Table 3, effective 12/03/24 |
| Water Tap Fee | Varies by tap size (e.g., $53,500 example for a 3/4-inch tap in the City's worked example) — see Tap Fee Calculation Form | Contact Public Works at (303) 335-4608 for current tap fee amount |
Residential Addition / Remodel Permit
VerifiedRequired for room additions, remodels, and basement finishes to existing one- and two-family dwellings in Louisville. Reviewed under the 2024 IRC and, where scope triggers it, the Fire Hardening Code and Development Impact Fees for additions exceeding 500 sq ft.
Verified 2026-07-05 · Source
Requirements
- Permit required for Residential: Addition and Residential: Remodel project types per the Permit Information page's review-time table
- Development Impact Fees apply to additions/remodels/basement finishes when adding over 500 sq ft, calculated on the DIFFERENCE between the existing square-footage bracket and the new total square-footage bracket (Table A, Ch. 3.16 LMC)
- Valuation = materials + labor + profit; minimum per the City's Building Valuation Data Table if higher than stated contract cost
- All contractors must hold a current City of Louisville Contractor License and be listed on the permit
- If the addition/remodel involves exterior work (roofing, siding, decks, fencing, gutters, vents) the Fire Hardening Code material standards apply
Required documents
- RequiredBuilding Permit Application (CSS Online Portal)Submitted electronically; select the Residential: Addition or Residential: Remodel project type
- RequiredConstruction DrawingsPlans showing the addition/remodel scope and structural connection to the existing structure
- OptionalSite Improvement ValuationRequired plan-review submittal document listed on the Permit Information page
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee (same valuation-based table as new construction) | $28.00 minimum, scaling per the valuation tiers in the Building Permit Fee Table | Table 4, CC 12/03/24 |
| In-House Plan Review Fee | 65% of the building permit fee | How to Calculate Building Fees for Residential Additions & Remodels, Section B |
| Development Impact Fees (only if adding over 500 sq ft, assessed on the bracket difference) | Per Table A tiers (e.g., $5,915.47-$12,355.52 range for single-family, bracket-differenced) | How to Calculate Building Fees for Residential Additions & Remodels guide |
| Boulder County Use Tax | 1.185% of 50% of Total Valuation | How to Calculate Building Fees for Residential Additions & Remodels, Section F |
| City of Louisville Use Tax | 3.775% of 50% of Total Valuation | How to Calculate Building Fees for Residential Additions & Remodels, Section G |
Electrical Permit
VerifiedRequired for electrical installation, alteration, or repair in Louisville. Governed by the 2023 NEC as adopted, including a local amendment (effective 9/1/2026) requiring GFCI protection on new outdoor A/C units. Electrical contractors must hold a Colorado DORA Electrical Master License and State Contractor License, plus a City of Louisville Contractor License.
Verified 2026-07-05 · Source
Requirements
- Governed by the 2023 National Electrical Code (effective 1/5/2024), plus local amendment NEC 210.8(F) Exception #2 (effective 9/1/2026) requiring GFCI protection on all new outdoor A/C units
- Contractors must hold a Colorado DORA Electrical Master License and State Contractor License AND a City of Louisville Contractor License (LMC Sec. 5.12.090) before a permit can be issued
- Minor single-trade electrical work (MEP - Single Trade: Minor Electrical) is classified as a Minor Permit for review-timeline purposes
- All contractors must be listed on the permit before issuance
Required documents
- RequiredElectrical Permit Application (CSS Online Portal)Apply electronically under the appropriate MEP - Single Trade project type
- RequiredCity of Louisville Contractor LicenseRequired registration under LMC Sec. 5.12.090, in addition to the Colorado DORA Electrical Master License
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Permit fee — valuation-based (Building Permit Fee Table) | $28.00 minimum, scaling per valuation tiers | Table 4, CC 12/03/24; when not attached to a valid building permit |
| In-House Plan Review Fee | 65% of the permit fee (only if plan review is required) | City of Louisville Building Permit Fees, Step 3 — the plan review fee is 65% of the building permit fee. |
| Boulder County Use Tax | 1.185% of 50% of Total Valuation | City of Louisville Building Permit Fees, Step 6 — Boulder County use tax at 1.185% of 50% of the project valuation. |
| City of Louisville Use Tax | 3.775% of 50% of Total Valuation | City of Louisville Building Permit Fees, Step 6 — City of Louisville use tax at 3.775% of 50% of the project valuation. |
| Electrical Contractor Registration (license fee) | $0 (no fee listed) | City of Louisville Contractor's License Fee Table, Table 2 |
Plumbing Permit
VerifiedRequired for plumbing installation, alteration, or repair in Louisville, including sewer/water repair and new taps. Governed by the 2024 International Plumbing Code (IPC). Plumbing contractors must hold a Colorado DORA Plumbing Master License and State Contractor License, plus a City of Louisville Contractor License.
Verified 2026-07-05 · Source
Requirements
- Governed by the 2024 IPC as adopted (effective 12/6/2025)
- Contractors must hold a Colorado DORA Plumbing Master License and State Contractor License AND a City of Louisville Contractor License
- Sewer/Water Repair (single trade) is classified as a Minor Permit; New Sewer/Water/Irrigation Tap is classified under 'Other Permits' for review-timeline purposes
- Water and Sewer Tap Fees are separate line items — see Tap Fee Calculation Form; contact Public Works at (303) 335-4608
Required documents
- RequiredPlumbing Permit Application (CSS Online Portal)Apply electronically under the appropriate MEP - Single Trade project type
- OptionalFixture Count form (Residential or Commercial)Required document listed on the Permit Information page for water/sewer tap fee calculation
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Permit fee — valuation-based (Building Permit Fee Table) | $28.00 minimum, scaling per valuation tiers | Table 4, CC 12/03/24 |
| In-House Plan Review Fee | 65% of the permit fee (only if plan review is required) | City of Louisville Building Permit Fee Table, Table 4, Plan Review and Administration Fees, CC 12/03/24 |
| Sewer Tap Fee — Single Family Residential | $4,600 per unit | Table 3, effective 12/03/24, no annual inflator applied |
| Boulder County Use Tax | 1.185% of 50% of Total Valuation | City of Louisville Building Permit Fees, Step 6 — Boulder County use tax at 1.185% of 50% of the project valuation. |
| City of Louisville Use Tax | 3.775% of 50% of Total Valuation | City of Louisville Building Permit Fees, Step 6 — City of Louisville use tax at 3.775% of 50% of the project valuation. |
Mechanical / HVAC Permit
VerifiedRequired for heating, cooling, and ventilation equipment installation or replacement in Louisville, including A/C units, furnaces, boilers, and water heaters. Governed by the 2024 International Mechanical Code (IMC).
Verified 2026-07-05 · Source
Requirements
- Governed by the 2024 IMC as adopted (effective 12/6/2025)
- MEP - Single Trade: A/C, Furnace/Boiler, Water Heater, and Minor Mechanical are classified as Minor Permits for review-timeline purposes
- New outdoor A/C unit installations must comply with the local NEC 210.8(F) Exception #2 GFCI amendment effective 9/1/2026
- Mechanical contractors require a Journeyman Mechanical G31 (2018 edition) or Master Mechanical G29 ICC test result, plus a City of Louisville Contractor License
- The Building Department will not conduct furnace, A/C, or water heater inspections with the property owner present per city policy — a licensed contractor must be involved
Required documents
- RequiredMechanical Permit Application (CSS Online Portal)Apply electronically under the appropriate MEP - Single Trade project type
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Permit fee — valuation-based (Building Permit Fee Table) | $28.00 minimum, scaling per valuation tiers | Table 4, CC 12/03/24 |
| In-House Plan Review Fee | 65% of the permit fee (only if plan review is required) | City of Louisville Building Permit Fees, Step 3 — the plan review fee is 65% of the building permit fee. |
| Boulder County Use Tax | 1.185% of 50% of Total Valuation | City of Louisville Building Permit Fees, Step 6 — Boulder County use tax at 1.185% of 50% of the project valuation. |
| City of Louisville Use Tax | 3.775% of 50% of Total Valuation | City of Louisville Building Permit Fees, Step 6 — City of Louisville use tax at 3.775% of 50% of the project valuation. |
Roofing Permit (Re-Roof)
VerifiedRequired for roofing and re-roofing work in Louisville. Classified as a Minor Permit for review-timeline purposes, but subject to the Louisville Fire Hardening Code's Class A fire-resistant material standards.
Verified 2026-07-05 · Source
Requirements
- 'Minor Permit: Re-Roof' is listed on the Permit Information page's review-time table under Minor Permits
- Roof coverings must be Class A per ASTM E108 or UL 790 standard, per the Louisville Fire Hardening Code (Ordinance 1884/1891, Emergency Ordinance 1913 effective 1/21/2026) — applies citywide to new construction and repair/replacement of roofing, not limited to a mapped WUI zone
- Roof, attic, and foundation vents must be covered with metal mesh with 1/8-inch or smaller openings
- Gutters must be metal (vinyl prohibited) and must include gutter guards to prevent debris accumulation
- Contractor must hold a City of Louisville Contractor License and be responsible for obtaining the permit and complying with Fire Hardening requirements
Required documents
- RequiredRoofing Permit Application (CSS Online Portal)Apply electronically under the Minor Permit: Re-Roof project type
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Permit fee — valuation-based (Building Permit Fee Table) | $28.00 minimum, scaling per valuation tiers | Table 4, CC 12/03/24 |
| Boulder County Use Tax | 1.185% of 50% of Total Valuation | City of Louisville Building Permit Fees, Step 6 — Boulder County use tax at 1.185% of 50% of the project valuation. |
| City of Louisville Use Tax | 3.775% of 50% of Total Valuation | City of Louisville Building Permit Fees, Step 6 — City of Louisville use tax at 3.775% of 50% of the project valuation. |
Accessory Dwelling Unit (ADU) Permit
VerifiedRequired for construction of an ADU on a single-family lot in Louisville, per Ordinance 2025-1892 (adopted May 20, 2025, effective June 23, 2025), enacted to comply with a 2024 Colorado state law mandating ADU allowance on all single-family lots by June 2025. Reviewed as a new residential building permit by the Building Safety Division; zoning compliance reviewed by the Planning Division.
Verified 2026-07-05 · Source
Requirements
- One ADU (attached or detached) permitted per single-family unit, in all zone districts (including PUDs) that allow single-family detached or attached (rowhome/townhome) units
- Maximum size: 1,000 sq ft detached / 800 sq ft attached, or up to 75% of the primary house's square footage (whichever is less); ADUs of at least 500 sq ft are always allowed if other requirements are met
- Maximum height: same as primary house (attached) / 25 feet (detached)
- Setbacks: same as primary house with 10-ft minimum rear setback (attached); standard accessory-structure setbacks (detached)
- One off-street parking space required only if on-street parking is prohibited on the block AND no excess parking exists on the lot
- Not permitted in the front yard, except in Old Town in an existing building
- First 500 sq ft of an ADU is exempt from lot coverage/FAR calculations and from Development Impact Fee calculations
- Historic-landmark, affordable-housing (deed-restricted per LMC Ch. 17.76), and accessible-dwelling-unit ADUs may qualify for a size increase to 1,000 sq ft (detached) / 1,200 sq ft (attached)
- Building-code review currently uses the City's adopted 2024 ICC codes, including ADU-specific Appendix BC provisions
- Existing non-permitted units built before May 20, 2025 may seek a voluntary Certificate of Exception (LMC Sec. 17.16.035.G) by December 31, 2026 — after January 1, 2027, any such unit without a Certificate of Exception or ADU permit is not permitted
- Short-term rental of an ADU is prohibited by the Louisville Municipal Code; only monthly-or-longer leasing is allowed
Required documents
- RequiredBuilding Permit Application (CSS Online Portal)Standard new-residential building permit process applies to ADU construction
- OptionalADU HandoutCity-published guidance document on ADU requirements
- OptionalCertificate of Exception ChecklistOnly required for existing non-permitted units seeking legal-nonconforming status, not for new ADU construction
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee (same valuation-based table as new residential construction) | $28.00 minimum, scaling per the valuation tiers in the Building Permit Fee Table | Standard fee table applies; no ADU-specific fee variance published |
| Development Impact Fees | First 500 sq ft exempt; if the ADU exceeds 500 sq ft, fees apply only if the added square footage pushes the property into a higher bracket under Appendix A, Ch. 3.16 LMC | ADUs, Rentals, Guest Houses page FAQ |
| Certificate of Exception fee (existing non-permitted units only, not new construction) | $200 | Applies only to the voluntary legal-nonconforming pathway for pre-existing units, not new ADU permits |
Demolition Permit
VerifiedRequired for exterior/whole-structure and interior-only demolition in Louisville. Classified under 'Other Permits' on the City's review-time table.
Verified 2026-07-05 · Source
Requirements
- 'Minor Permit: Demolition – Exterior or Whole Structure' and 'Minor Permit: Demolition – Interior Only' are both listed under the Other Permits category on the Permit Information page
- Valuation-based fee per the standard Building Permit Fee Table
- All contractors must hold a current City of Louisville Contractor License
Required documents
- RequiredDemolition Permit Application (CSS Online Portal)Apply electronically under the applicable Demolition project type (Exterior/Whole Structure or Interior Only)
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Permit fee — valuation-based (Building Permit Fee Table) | $28.00 minimum, scaling per valuation tiers | Table 4, CC 12/03/24; no demolition-specific flat fee is published, so demolition is priced from the general table. |
| Boulder County Use Tax | 1.185% of 50% of Total Valuation | City of Louisville Building Permit Fees, Step 6 — Boulder County use tax at 1.185% of 50% of the project valuation. |
| City of Louisville Use Tax | 3.775% of 50% of Total Valuation | City of Louisville Building Permit Fees, Step 6 — City of Louisville use tax at 3.775% of 50% of the project valuation. |
Fence / Retaining Wall Permit
VerifiedRequired for fence and retaining wall construction in Louisville. Classified under 'Other Permits' on the review-time table, and subject to the Fire Hardening Code's Class A fire-resistance requirement for fencing within 5 feet of a structure.
Verified 2026-07-05 · Source
Requirements
- 'Minor Permit: Fence' and 'Minor Permit: Retaining Wall' are both listed under the Other Permits category on the Permit Information page
- Fencing within 5 feet of the home or commercial building must be Class A fire/ignition-resistant (ASTM E84 or UL 723) per the Louisville Fire Hardening Code — treated materials are not allowed unless the treatment maintains its Class A rating for the material's life without reapplication, OR an inherently ignition-resistant material (metal, masonry, stone) must be used
- Foundation Setback Certification may be required for retaining walls per the Permit Information page's plan-review documents list
Required documents
- RequiredFence/Retaining Wall Permit Application (CSS Online Portal)Apply electronically under the applicable Minor Permit project type
- RequiredSite PlanShowing fence/wall location relative to property lines and the 5-foot Fire Hardening Code trigger zone
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Permit fee — valuation-based (Building Permit Fee Table) | $28.00 minimum, scaling per valuation tiers | No fence/wall-specific flat fee is published; billed under the general Building Permit Fee Table |
| Boulder County Use Tax | 1.185% of 50% of Total Valuation | City of Louisville Building Permit Fees, Step 6 — Boulder County use tax at 1.185% of 50% of the project valuation. |
| City of Louisville Use Tax | 3.775% of 50% of Total Valuation | City of Louisville Building Permit Fees, Step 6 — City of Louisville use tax at 3.775% of 50% of the project valuation. |
Solar PV Permit (Roof Top Unit/Solar/Telecommunication)
VerifiedRequired for installation of rooftop or ground-mounted solar photovoltaic systems in Louisville. The City's own Permit Information page publishes a dedicated 'Roof Top Unit/Solar/Telecommunication' review-timeline category, distinct from both the fast Minor Permit track and the slower Residential/Commercial new-construction tracks. Billed on the same valuation-based Building Permit Fee Table as other permits, plus the City's use-tax stack. Solar contractors need a specific Colorado DORA Solar license type in addition to a City of Louisville Contractor License.
Verified 2026-07-20 · Source
Requirements
- Governed by the City's adopted 2024 IBC/IRC (structural/racking scope) and 2023 NEC (electrical interconnection scope, effective 1/5/2024)
- Falls under the City's published 'Roof Top Unit/Solar/Telecommunication' review-timeline category, per the Permit Information page's Estimated Submittal Review Times table
- Contractors performing solar installation work must hold the corresponding Colorado DORA Master License for the Solar license type, plus a State Contractor License AND a City of Louisville Contractor License (LMC Sec. 5.12.090) before a permit can be issued — per the Contractor Licensing page's Electrical/Plumbing/Solar license-type requirement
- Valuation = cost of materials, labor, and profit for the installation; the higher of stated contract cost or the City's Building Valuation Data Table governs the fee
- All permit submittals must be made electronically through the City's CSS Online Portal
- Fire Hardening Code roof-covering and vent-mesh requirements (Class A rating, 1/8-inch metal mesh) may interact with roof-mounted racking scope — confirm compliance with the Building Safety Division
Required documents
- RequiredBuilding/Electrical Permit Application (CSS Online Portal)Submitted electronically under the Roof Top Unit/Solar/Telecommunication project type
- RequiredCity of Louisville Contractor License (Solar license type)Required in addition to the Colorado DORA Solar Master License and State Contractor License, per LMC Sec. 5.12.090
- RequiredConstruction Drawings / One-Line Electrical DiagramRacking/structural detail and electrical interconnection diagram for plan review
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building/Electrical Permit Fee — valuation $0.00 to $500.00 | $28.00 | City of Louisville Building Permit Fee Table, Table 4, CC 12/03/24 — no dedicated solar-specific flat fee line is published; PV installations are billed on the same general valuation-based table as other building/electrical permits. |
| Building/Electrical Permit Fee — valuation $2,001.00 to $25,000.00 | $82.00 for the first $2,000.00 plus $16.00 for each additional $1,000.00 or fraction thereof, to and including $25,000.00 | Table 4, CC 12/03/24 — typical valuation range for a residential rooftop PV system |
| In-House Plan Review Fee | 65% of the building/electrical permit fee | City of Louisville Plan Review and Administration Fees table |
| Boulder County Use Tax | 1.185% of 50% of Total Valuation | City of Louisville Building Permit Fees, Step 6 — Boulder County use tax at 1.185% of 50% of the project valuation. |
| City of Louisville Use Tax | 3.775% of 50% of Total Valuation | City of Louisville Building Permit Fees, Step 6 — City of Louisville use tax at 3.775% of 50% of the project valuation. |
EV Charger / Electric Vehicle Charging Station Permit
VerifiedLouisville (population 21,226 at the 2020 Census) is a 'covered municipality' under Colorado HB24-1173, which required cities over 10,000 residents to adopt, by December 31, 2025, either the Colorado Energy Office's EV charger permitting model code, their own objective standards with an administrative review process (with a published applicant checklist and a 3-business-day decision-notification requirement), or a formal decision to keep existing procedures. Louisville's Building Codes page lists the Colorado Model Electric Ready and Solar Ready Code as adopted effective 12/6/25, alongside the 2023 NEC (effective 1/5/24) -- confirm with Building Safety whether this satisfies HB24-1173 and whether a distinct EV charger permit checklist exists. Absent a published EV-specific fee line, a retrofit Level 2 home EV charger is permitted through the City's standard 'MEP - Single Trade: Minor Electrical' permit track.
Verified 2026-07-20 · Source
Requirements
- Electrical work must be performed by a contractor holding a Colorado DORA Electrical Master License and State Contractor License, plus a City of Louisville Contractor License
- Reviewed against the 2023 NEC as adopted (effective 1/5/24)
- All permit submittals must be done electronically through the City's online permit portal
- New construction is also subject to the Colorado Model Electric Ready and Solar Ready Code (adopted effective 12/6/25), which sets EV-ready circuit/panel-capacity requirements for new buildings -- relevant if the charger is being installed as part of new construction rather than a retrofit
- As a covered municipality under HB24-1173 (population over 10,000), Louisville was required to adopt an EV charging system permitting approach by 12/31/2025; confirm with Building Safety which of the law's three options the City selected and whether a dedicated EV charger application checklist is available
Required documents
- RequiredMEP - Single Trade: Minor Electrical permit application (electronic portal)Submitted through the City of Louisville's online permit portal for a retrofit EV charger circuit
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Permit fee -- valuation-based (Building Permit Fee Table) | $28.00 minimum, scaling per valuation tiers | City of Louisville Building Permit Fee Table (Table 4, CC 12/03/24) -- no distinct 'EV charger'/'EVSE' line item exists; this is the general valuation-based electrical permit fee an EV charger circuit installation would be billed under |
| In-House Plan Review Fee | 65% of the permit fee (only if plan review is required) | City of Louisville fee schedule |
| Boulder County Use Tax | 1.185% of 50% of Total Valuation | City of Louisville fee schedule |
| City of Louisville Use Tax | 3.775% of 50% of Total Valuation | City of Louisville fee schedule |
Commercial Building Permit (New Building / Core & Shell / Addition)
VerifiedRequired for new commercial buildings, core-and-shell construction, commercial additions, and commercial footing/foundation work in Louisville. The City runs a distinct commercial track in its CSS portal with four project types — 'Commercial: New Building with Tenant', 'Commercial: Core and Shell', 'Commercial: Addition', and 'Commercial: Footing/Foundation' — each with its own published document checklist. Reviewed under the 2024 IBC (effective 12/6/2025) by the City's in-house Building Safety Division, with a published 4-week first-review-comments timeline.
Verified 2026-08-02 · Source
Requirements
- Reviewed under the 2024 IBC/IECC/IMC/IPC/IFGC/IEBC as adopted (effective 12/6/2025) and the 2023 NEC (effective 1/5/2024)
- Building plans must be stamped (architect/engineer) per the City's 'Documents Required for Permit Application — COMMERCIAL' checklist
- General Building Contractor must hold a City of Louisville Contractor License (LMC Sec. 5.12.090) — Class A/B/C requires a passing ICC national test result (G11/G12/G13, 2018 edition or later); license fees $175/$116/$88 by class per Table 2 of the City fee schedule
- Valuation = materials + labor + profit; minimum valuation per the City of Louisville Building Valuation Data Table, and where actual contract cost differs the HIGHER of the two governs the fee — the City reserves the right to audit any project (Table 4 note, CC 12/03/24)
- All permit submittals are electronic-only through the CSS Online Portal
- Nonresidential Development Impact Fees are charged with the 1st tenant after Core & Shell, or at the time of the New Build when the tenant is known (Impact Fees guide + New Commercial fee guide)
- Phased building permits are available; plan review for a phased permit costs 100% of the building permit fee after issuance
- The Louisville Fire Hardening Code applies to commercial buildings too (e.g., fencing within 5 feet of a commercial building must be Class A fire/ignition-resistant)
Required documents
- RequiredBuilding Plans (stamped)Required for all four commercial project types per the Documents Required for Permit Application — COMMERCIAL checklist
- RequiredCommercial Checklist (2024 IBC Plan Review Checklist Commercial)City plan-review checklist listed on the Permit Information page
- RequiredSoils ReportRequired for Commercial: Addition, Core and Shell, and New Building with Tenant
- RequiredFixture Count Form — Commercial (stamped)Used for water/sewer tap fee calculation
- RequiredSite Improvement WorksheetRequired for Core and Shell and New Building with Tenant project types
- OptionalWastewater Classification Survey — CommercialOnly required if the tenant is new
- OptionalWater & Sewer Tap ApplicationOnly required for a tap upgrade
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee — valuation $0.00 to $500.00 | $28.00 (except as provided in Sec. 15.04.060.14(e) LMC for residential permits) | Same valuation-based Building Permit Fee Table (Table 4, CC 12/03/24) reproduced in the City's How to Calculate Building Fees for New Commercial Buildings guide |
| Building Permit Fee — valuation $2,000.01 to $25,000.00 | $82.00 for the first $2,000.00 plus $16.00 for each additional $1,000.00 or fraction thereof | How to Calculate Building Fees for New Commercial Buildings, Section A |
| Building Permit Fee — valuation $100,000.01 to $500,000.00 | $1,000.00 for the first $100,000.00 plus $6.00 for each additional $1,000.00 or fraction thereof | How to Calculate Building Fees for New Commercial Buildings, Section A |
| Building Permit Fee — valuation $1,000,000.01 and up | $6,000.00 for the first $1,000,000.00 plus $4.00 for each additional $1,000.00 or fraction thereof | City's own worked example: $2,000,000 valuation → $10,000 building permit fee |
| In-House Plan Review Fee | 65% of the building permit fee | Worked example: $6,500 on a $2M-valuation project |
| Outside Consultant Plan Review | Actual cost, plus 20% of the building permit fee as administrative/overhead | Table 4 Other Inspections and Fees + Plan Review and Administration Fees, CC 12/03/24 |
| Nonresidential Development Impact Fees (per square foot) | Commercial $4.03/sq ft; Office $1.75/sq ft; Institutional $2.43/sq ft; Industrial $0.60/sq ft (Transportation component only; Library and Parks & Trails are $0 for nonresidential) | Impact Fees guide Table A. Note: the New Commercial guide's worked example uses an older $1.68/sq ft Office rate; Show full citationHideImpact Fees guide Table A. Note: the New Commercial guide's worked example uses an older $1.68/sq ft Office rate; Table A in that same guide and the standalone Impact Fees document both list $1.75 — Table A treated as current. Charged with the 1st tenant after Core & Shell or at New Build when the tenant is known. |
| Boulder County Use Tax | 1.185% of 50% of Total Valuation | How to Calculate Building Fees for New Commercial Buildings, Section F |
| City of Louisville Use Tax | 3.775% of 50% of Total Valuation | How to Calculate Building Fees for New Commercial Buildings, Section G |
| Fire Department Fees | Set separately by the Fire Department (303-666-8809); City's worked example shows a $1,680 base fee for 1-15,000 sq ft, with additional fees assessed based on fire suppression needs | How to Calculate Building Fees for New Commercial Buildings, Section H and the Example: New Commercial Permit Fees table |
| Water / Irrigation / Sewer Tap Fees | Separate line items via the Tap Fee Calculation Form (Public Works, 303-335-4608); nonresidential sewer taps tiered by meter size from $4,600 (3/4") to $130,900 (4") per Table 3 (effective 12/03/24). City's worked example: $214,000 water tap (1-1/2") + $95,300 irrigation tap (1") + $18,400 sewer tap (1-1/2") on a $2M new commercial project | How to Calculate Building Fees for New Commercial Buildings, Example: New Commercial Permit Fees table; meter-size tiers from Table 3, Sewer Tap Fees, CC 12/03/24 |
| Site Improvements | Use taxes paid on 50% of the Total Site Improvement Valuation | Worked example: $6,200 on a $250,000 site improvement valuation |
| Temporary Certificate of Occupancy | $175.00 | City of Louisville Building Permit Fee Table, Table 4, Other Inspections and Fees, item 6, CC 12/03/24 |
| Re-Inspection Fee / After-Hours Inspection | $200.00 per hour (after-hours minimum charge 2 hours) | City of Louisville Building Permit Fee Table, Table 4, Other Inspections and Fees, items 1 and 2, CC 12/03/24 |
Commercial Tenant Improvement / Tenant Finish Permit
VerifiedRequired for tenant finish and minor commercial work in existing commercial spaces in Louisville. This is a genuinely distinct permit type — the CSS portal lists 'Commercial: Tenant Finish or Minor Commercial Work' as its own project type, the City publishes a dedicated 'How to Calculate Building Fees for a Commercial Tenant Finish' guide (Rev. 01.01.2024), and the required document set is lighter than new commercial construction (no soils report or site improvement worksheet). Same valuation-based fee table as other permits, but impact fees apply only on a change in use and tap fees only if a larger tap is needed.
Verified 2026-08-02 · Source
Requirements
- Apply under the 'Commercial: Tenant Finish or Minor Commercial Work' project type in the CSS Online Portal (electronic-only submittal)
- Building plans must be stamped per the Documents Required for Permit Application — COMMERCIAL checklist
- Reviewed under the City's adopted 2024 ICC codes (IBC/IEBC/IECC/IMC/IPC effective 12/6/2025) and 2023 NEC
- All contractors employed on the project must hold a current City of Louisville Contractor License (LMC Sec. 5.12.090) and be listed on the permit
- Valuation = materials + labor + profit; the higher of stated contract cost or the City's Building Valuation Data Table governs the fee
- Impact fees apply only for a change in use (or with the 1st tenant after a Core & Shell); water/sewer tap fees apply only if a larger tap is needed
Required documents
- RequiredBuilding Plans (stamped)Required per the COMMERCIAL documents checklist for the Tenant Finish / Minor Commercial Work permit type
- RequiredCommercial Checklist (2024 IBC Plan Review Checklist Commercial)City plan-review checklist, available under Building Safety Information in the portal or the Permit Information page
- RequiredFixture Count Form — Commercial (stamped)Used to evaluate water/sewer demand against the existing tap
- OptionalWastewater Classification Survey — CommercialOnly required if the tenant is new
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee — valuation-based (Building Permit Fee Table) | $28.00 minimum, scaling per the standard valuation tiers (Table 4, CC 12/03/24) | City's own worked example in the Tenant Finish guide: $1,000,000 valuation → $6,500 building permit fee |
| In-House Plan Review Fee | 65% of the building permit fee | Worked example: $4,225 on a $1M-valuation tenant finish |
| Development Impact Fees | $0 unless the project involves a change in use (or is the 1st tenant after a Core & Shell); if triggered, nonresidential rates are per sq ft: Commercial $4.03, Office $1.75, Institutional $2.43, Industrial $0.60 | Tenant Finish fee guide ('Only for a change in use') + Impact Fees guide Table A |
| Water / Sewer Tap Fees | $0 unless a larger tap size is needed — see Tap Fee Calculation Form (Public Works, 303-335-4608) | How to Calculate Building Fees for a Commercial Tenant Finish, Sections D and E |
| Boulder County Use Tax | 1.185% of 50% of Total Valuation | Worked example: $5,925 on $1M valuation |
| City of Louisville Use Tax | 3.775% of 50% of Total Valuation | Worked example: $18,875 on $1M valuation |
| Fire Department Fee | Set separately by the Fire Department (303-666-8809); City's worked example shows a $665 base fee, with additional fees possible | How to Calculate Building Fees for a Commercial Tenant Finish, Section H and the Example: Commercial Tenant Finish Permit Fees table |
| Additional Plan Review Fee After Permit is Issued | $120.00-$125.00 per hour (minimum 1 hour) | The Tenant Finish guide (Rev. 01.01.2024) lists $120/hour; the newer New Commercial guide lists $125/hour — the rate varies by fee-guide version |
| Temporary Certificate of Occupancy | $175.00 | How to Calculate Building Fees for a Commercial Tenant Finish, Other Inspections and Fees, item 5 |
Sign Permit
VerifiedThe City of Louisville publishes a dedicated Sign Code page (Planning Department, Zoning & Design Regulations). All permanent signs require a sign permit, including any new installation or a copy change, face change, or other alteration to an existing permanent sign — with the exception that permanent non-illuminated window signs and non-illuminated wall-mounted display signs do not require a permit.
Verified 2026-08-14 · Source
Requirements
- A sign permit is required for all permanent signs, including new installations and any copy change, face change, or other alteration to an existing permanent sign
- EXEMPT from permit: permanent non-illuminated window signs, and permanent non-illuminated wall-mounted display signs
- Governed by the City's Sign Code (Planning Department, Zoning & Design Regulations)
- Contact the Planning Department or Building Safety Division to confirm current application requirements and fees
Required documents
- RequiredSign Permit ApplicationContact the Planning Department to confirm the current application form and requirements
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Sign Permit Fee | Not independently confirmed | Contact the Planning Department or Building Safety Division ((303) 335-4584, building@louisvilleco.gov) for a current fee quote |
Fire Sprinkler / Fire Alarm System Permit
VerifiedFire protection for Louisville is provided by the Louisville Fire Protection District (LFPD, main line 303-666-8809), a special district separate from City government. LFPD's Fire Prevention Division guides property owners through fire sprinkler plan review, requiring a completed fire sprinkler plan review form; all permit submittals must include the applicable code of design, a professional or equivalent stamp, material data sheets, and accurate address (including suites) on all sheets. Permits are valid for 180 days from date of issuance. Per LFPD's published fee materials, fees for automatic sprinkler system permits range from roughly $500 to $1,000+ depending on the number of sprinkler heads. Notably, the City of Louisville has removed the requirement for residential fire sprinklers city-wide.
Verified 2026-08-14 · Source
Requirements
- Fire protection for Louisville is provided by the Louisville Fire Protection District (LFPD), a special district separate from City government
- All permit submittals must include: applicable code of design, professional or equivalent stamp, material data sheets, and accurate address (including suites) on all sheets
- A completed fire sprinkler plan review form is required for sprinkler plan submissions
- Permits are valid for 180 days from date of issuance
- The City of Louisville has removed the requirement for residential fire sprinklers city-wide — this permit type is primarily relevant to commercial/multi-family projects
Required documents
- RequiredLFPD Fire Sprinkler Plan Review FormLouisville Fire Protection District form for fire sprinkler system plan submissions
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Automatic Sprinkler System Permit | Approximately $500 to $1,000+, depending on the number of sprinkler heads | LFPD's published fee materials reference a '2026 Fee Schedule' document; the exact current dollar figures are not independently confirmed here. Contact LFPD (303-666-8809) for a current fee quote. |
Change of Use / Change of Occupancy
No standalone City of Louisville 'Change of Use' or 'Change of Occupancy' permit application distinct from the general Building Safety Division permitting process is documented in the City's published materials. A use/occupancy change is presumed to be processed through the general Building Permit process.
Reviewed 2026-08-14 · Source
Requirements
- No standalone change-of-use or change-of-occupancy application distinct from the general Building Permit process is independently confirmed to exist
- Contact the Building Safety Division ((303) 335-4584, building@louisvilleco.gov) to confirm requirements for a specific change-of-use project
Required documents
- RequiredBuilding Permit Application (Change of Use)Contact the Building Safety Division to confirm current requirements
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee (if construction accompanies the change) | Contact the Building Safety Division ((303) 335-4584) for a current fee quote |
Sources & verification
Verified against official sources. Last reviewed 2026-07-05.
Fee schedules
Online permit portal
Codes & ordinances
Department & other records
Fees, timelines, and adopted codes are researched from each jurisdiction's published records — see how we verify. Requirements change and vary by project, so always confirm the current details with the Louisville building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.