This is PermitBase’s published record for Longmont as of 2026-06-30. It has since been superseded — see the current record. A historical record reflects what PermitBase had verified at that time; it may not capture a real-world change the jurisdiction had made but PermitBase had not yet verified, and it includes any errors we later corrected. Snapshots are never edited retroactively.
Longmont building permits
VerifiedLongmont, Colorado — as published 2026-06-30.
Verified 2026-06-30 · Source
Codes adopted
2021 International Building Code (IBC) — adopted effective January 1, 2022; currently in force citywide2021 International Residential Code (IRC) — adopted effective January 1, 2022; currently in force citywide2021 International Energy Conservation Code (IECC) — adopted as part of the 2021 International Codes package effective January 1, 20222021 International Fire Code (IFC) — adopted effective January 1, 2022International Plumbing Code (IPC) and International Mechanical Code (IMC) / International Fuel Gas Code (IFGC) — adopted as part of the 2021 International Codes package effective January 1, 2022 (edition confirmed via Longmont's 2021 IBC/IRC Geographic Climatic Data Table; individual plumbing/mechanical/fuel-gas amendment ordinance text not independently re-verified beyond the city's codes-adoption page)2023 National Electrical Code (NEC) — adopted with Longmont amendments, effective July 24, 2024PENDING — NOT YET EFFECTIVE: 2024 International Codes plus the Colorado Energy Code Cohort's model amendments were scheduled for Longmont City Council consideration May 12, 2026, with an anticipated effective date of July 1, 2026. As of this extraction (lastVerified 2026-06-30), the City's own Building Code Update page still describes this as a pending/anticipated action, not a confirmed adopted-and-effective ordinance — DO NOT treat the 2024 codes as adopted until the city's codes page or Municode ordinance list confirms passage.
Permit types & fees
Residential Building Permit (New Construction)
VerifiedRequired for construction of new single-family homes and other new residential buildings in Longmont. Reviewed against the 2021 IRC (effective Jan 1, 2022) and Longmont's Geographic & Climatic Design Criteria. Applications are submitted through the Accela Citizen Access (ACA) portal.
Verified 2026-06-30 · Source
Requirements
- Building permit required for all new construction
- Plans must comply with the 2021 IRC and Longmont's Geographic & Climatic Design Criteria (30 psf snow load, 110 mph nominal / 142 mph ultimate wind, Seismic Design Category B, 30-inch frost depth)
- Homeowner may act as own general contractor on their own property without a Longmont contractor's license; subcontracted trades must be licensed to work in Longmont
- Applications submitted online via the Accela Citizen Access (ACA) portal (aca.longmontcolorado.gov)
- Approved plans must be kept on-site during construction
- Sales/use tax due at permit issuance: 50% of project valuation × current city+county tax rate (4.865% combined, per FY2026 Fee Manual)
Required documents
- RequiredResidential New Construction Application (via ACA portal)Online application through Accela Citizen Access; listed under Applications for Permit
- RequiredSite Plan / SurveyProperty lines, setbacks, existing/proposed structures, drainage, grading
- RequiredConstruction DrawingsFull architectural and structural plan set showing compliance with the 2021 IRC and Longmont climatic/geographic design criteria
- RequiredEnergy Compliance DocumentsManual J, Manual D, Manual S and applicable energy compliance path documentation
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee — valuation $1 to $500 | $27.00 | City of Longmont FY2026 Planning & Development Services Fee Manual, Primary Fee Schedule (effective 3/24/2026) |
| Building Permit Fee — valuation $501 to $2,000 | $27.00 for the first $500, plus $3.50 for each additional $100 or fraction thereof | — |
| Building Permit Fee — valuation $2,001 to $25,000 | $79.50 for the first $2,000, plus $16.10 for each additional $1,000 or fraction thereof | — |
| Building Permit Fee — valuation $25,001 to $50,000 | $449.80 for the first $25,000, plus $11.61 for each additional $1,000 or fraction thereof | — |
| Building Permit Fee — valuation $50,001 to $100,000 | $740.05 for the first $50,000, plus $8.05 for each additional $1,000 or fraction thereof | — |
| Building Permit Fee — valuation $100,001 to $500,000 | $1,142.55 for the first $100,000, plus $6.44 for each additional $1,000 or fraction thereof | — |
| Building Permit Fee — valuation $500,001 to $1,000,000 | $3,718.55 for the first $500,000, plus $5.46 for each additional $1,000 or fraction thereof | — |
| Building Permit Fee — valuation $1,000,001 and up | $6,448.55 for the first $1,000,000, plus $4.20 for each additional $1,000 or fraction thereof | — |
| Plan Review Fee — residential | 50% of the Building Permit Fee | FY2026 Fee Manual, Plan Review Fees table |
| Valuation Basis | Gross floor area (sq ft) or scope of work × ICC 'Building Valuation Data' or RS Means 'Building Construction Cost Data', reviewed/adopted annually by City Council | FY2026 Fee Manual, Building Permit Fees Overview |
| Sales/Use Tax | 50% of project valuation × 4.865% (combined current city and county rate) | FY2026 Fee Manual, Building Permit Fees Overview |
| Impact Fees (Transportation, Recreation Buildings, Parks Improvement, Storm Drainage) | Vary by unit size — e.g., Transportation Fee residential 800 sq ft or less = $1,286.75, up to 4,000+ sq ft = $2,782.18; Parks Improvement Fee per single-family detached unit = $7,418.75; Storm Drainage Fee residential single-family per permit = $1,693.53 | FY2026 Fee Manual, Impact and Development Fees section (pages 7-8); full table applies to all new residential construction |
Residential Addition / Remodel Permit
VerifiedRequired for additions, remodels, basement finishes, and structural alterations to existing residential buildings in Longmont. Uses the same valuation-based Primary Fee Schedule as new construction. Filed as a 'Residential Remodel/Addition' application via the ACA portal.
Verified 2026-06-30 · Source
Requirements
- Building permit required for any addition or alteration to an existing building or structure
- Covers basement finishes, room additions, garage conversions, re-siding, retaining walls over 48 inches, and similar alterations
- Applications submitted via the Accela Citizen Access (ACA) portal, 'Residential Remodel/Addition' application type
- Homeowner may self-permit as own contractor on their own property
Required documents
- RequiredResidential Remodel/Addition Application (via ACA portal)Online application through Accela Citizen Access
- RequiredSite PlanExisting structures, proposed addition footprint, setbacks
- RequiredConstruction DrawingsPlans showing scope of addition/remodel, structural details where applicable
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee — valuation-based (same Primary Fee Schedule as new construction) | $27.00 minimum, scaling to $6,448.55 + $4.20/$1,000 over $1,000,000 | City of Longmont FY2026 Fee Manual, Primary Fee Schedule — applies identically to additions/remodels based on project valuation |
| Plan Review Fee | 50% of the Building Permit Fee | FY2026 Fee Manual |
| Additional Plan Review (changes/revisions to plans) | $47.00 minimum charge (one hour) | FY2026 Fee Manual, Plan Review Fees table |
| Additional Plan Review (incomplete/changed submittal documents) | $47.00/hour | — |
Electrical Permit
VerifiedRequired for electrical installations, service changes, and alterations in Longmont. Electrical contractors must hold a Colorado State Master Electrician License AND a Colorado State Electrical Contractor License, then register with the City of Longmont (no additional city license fee). Longmont Power & Communications (LPC), the city's own municipal electric utility, is directly involved in electrical permitting — LPC staff exclusively perform ALL electric meter sets/removals and service disconnects/reconnects.
Verified 2026-06-30 · Source
Requirements
- Building permit required for any changes to electrical service
- Electrical contractors must submit a copy of their Colorado State Master Electrician License and Colorado State Electrical Contractor License to register with the City of Longmont (no city licensing fee for this registration)
- Proof of liability insurance required for city registration: $1,000,000 CSL / $2,000,000 general aggregate / $2,000,000 products-completed aggregate, naming City of Longmont as certificate holder
- Homeowners may self-perform electrical work on their own primary residence without a contractor's license; subcontracted electrical work must be performed by a contractor licensed to work in Longmont
- Electric service upgrades: applicant must show existing panel rating and proposed panel rating on the permit application
- Overhead-to-underground service conversions require prior confirmation from an LPC Field Engineer (303-651-8386)
- ONLY LPC staff may remove/install electric meters or perform service disconnects/reconnects — contractor or homeowner attempts are subject to meter-tampering fines and possible criminal prosecution
Required documents
- RequiredElectric Service/EV Application (via ACA portal)Distinct application type listed under Applications for Permit for electrical service and EV charger work
- RequiredResidential/Commercial Electrical Permit ChecklistCity of Longmont checklist covering contact info, service upgrade panel ratings, meter relocations, and disconnect/reconnect rules
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Residential Electrical Service Charge (temporary construction power) | $40.00 | City of Longmont FY2026 Fee Manual, Miscellaneous Inspections and Other Fees table |
| Electrical Permit for Signs | $40.00 | FY2026 Fee Manual, Miscellaneous Inspections and Other Fees table |
| General Electrical, Mechanical, Plumbing Sub-Permit Fee (when part of a combination/general building permit) | 50% of total permit fee for plan review, per the Plan Review Fees table; underlying permit fee based on actual contract value against the Primary Fee Schedule | FY2026 Fee Manual: 'Fees for plumbing permits, mechanical permits, electrical permits, and other miscellaneous permits and commercial work not listed above shall be based on actual contract amount of the work from the primary fee table' |
| City Contractor Registration — Electrical | $25.00 one-time Sales & Use Tax license charge for new contractors (no separate electrical license fee itself) | FY2026 Fee Manual, Contractor License Fees table: 'Electrical — $25*' where the note clarifies the $25 is the one-time Sales/Use Tax license charge, not a distinct electrical license fee; Contractor License Application confirms 'No fee is required for this type of license' |
| Electric Community Investment Fee (ECIF) — Residential | $739.41 to $2,956.59+ depending on panel amperage/voltage/phase (e.g., $739.41 for 120/240 or 120/208, 1-phase, 100-125 amp) | FY2026 Fee Manual, Electric Fees — Electric Community Investment Fees table; contact Longmont Power & Communications at (303) 651-8386 for exact applicable tier |
| Residential Electric Meter Fee | $166.75–$283.99 (handling fee included), by voltage/phase | FY2026 Fee Manual, Residential Electric Meter Fees table |
Plumbing Permit
VerifiedRequired for plumbing installations, alterations, and repairs in Longmont. Plumbing contractors must hold a Colorado State Master Plumber License AND a Colorado State Plumbing Contractor License, then register with the City of Longmont for a $75 fee (Class D specialty registration).
Verified 2026-06-30 · Source
Requirements
- Building permit required for any changes to plumbing services
- Plumbing contractors must submit a copy of their Colorado State Master Plumber License and Colorado State Plumbing Contractor License to register with the City of Longmont
- City registration fee of $75.00 required upon application approval
- Proof of liability insurance required: $1,000,000 CSL / $2,000,000 general aggregate / $2,000,000 products-completed aggregate, naming City of Longmont as certificate holder
- Homeowners may self-perform plumbing work on their own primary residence; subcontracted plumbing work must be performed by a contractor licensed to work in Longmont
Required documents
- RequiredPlumbing Permit Application (via ACA portal)Online application through Accela Citizen Access; combination/general permits may bundle plumbing sub-permits
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Water Heater Replacement | $40.00 | City of Longmont FY2026 Fee Manual, Other Permits — Residential/Commercial table |
| Lawn Sprinklers | $30.00 | FY2026 Fee Manual |
| General Plumbing Permit (not separately listed in flat-fee table) | Based on actual contract amount of the work applied to the Primary Fee Table | FY2026 Fee Manual: 'Fees for plumbing permits, mechanical permits, electrical permits, and other miscellaneous permits and commercial work not listed above shall be based on actual contract amount of the work from the primary fee table' |
| Plan Review Fee (plumbing permit not part of a combination permit) | 50% of total permit fee | FY2026 Fee Manual, Plan Review Fees table |
| City Contractor Registration — Plumbing (Class D) | $75.00 upon application approval | FY2026 Fee Manual, Contractor License Fees table: 'Class D, Plumbing and Mechanical — $75 + $25*'; Contractor License Application confirms 'A fee of $75 is required upon application approval' for Plumbing |
Mechanical / HVAC Permit
VerifiedRequired for heating, cooling, ventilation, and fuel-gas equipment installations in Longmont. Mechanical contractors need an ICC Master Mechanical certificate plus a $75 City of Longmont registration fee (Class D specialty).
Verified 2026-06-30 · Source
Requirements
- Building permit required for furnace, boiler, A/C, evaporative cooler, or gas appliance installation/replacement
- Mechanical contractors must submit a copy of their ICC Master Mechanical certificate to register with the City of Longmont
- City registration fee of $75.00 required upon application approval
- Proof of liability insurance required: $1,000,000 CSL / $2,000,000 general aggregate / $2,000,000 products-completed aggregate, naming City of Longmont as certificate holder
Required documents
- RequiredMechanical Permit Application (via ACA portal)Online application through Accela Citizen Access
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Air Conditioners and Evaporative Coolers | $40.00 | City of Longmont FY2026 Fee Manual, Other Permits — Residential/Commercial table |
| Furnace Replacement and Boilers | $40.00 | FY2026 Fee Manual; if the permit application includes BOTH furnace and A/C, the combined fee is $50.00 flat |
| Furnace + A/C combined permit | $50.00 | FY2026 Fee Manual: 'If permit application includes furnace and A/C, the fee is $50' |
| Gas Logs / Gas Inserts / Gas Fireplaces | $40.00 | FY2026 Fee Manual |
| Wood-Burning Stoves / Fireplaces / Inserts / Pellet Stoves | $40.00 (plus $250 surcharge for wood-burning fireplaces specifically) | FY2026 Fee Manual, footnote: 'A surcharge of $250 is added for wood-burning fireplaces' |
| Hot Tubs and Above-Ground Pools | $40.00 | FY2026 Fee Manual |
| Thermal Insulation | $40.00 | FY2026 Fee Manual |
| City Contractor Registration — Mechanical (Class D) | $75.00 upon application approval | FY2026 Fee Manual, Contractor License Fees table: 'Class D, Plumbing and Mechanical — $75 + $25*' |
Roofing Permit (Reroof)
Required for roof replacement and repair in Longmont. Governed by the City's Roofing Guidelines for Commercial and Residential Projects, the 2021 IBC/IECC (commercial), and the 'one square' rule requiring full roof replacement once repair exceeds 100 sq ft.
Reviewed 2026-06-30 · Source
Requirements
- '1 Square' rule (in effect since 2012): if more than 100 sq ft (one roofing square) requires repair/replacement, the ENTIRE roof must be replaced, not just the affected plane
- Overlay (roofing over an existing layer) is NOT allowed — tear-off required
- Drip edge required at both eaves and rakes
- All roofing must carry a sustained wind warranty of 110 mph minimum; 3-tab shingles not allowed unless laminated
- Residential: homeowner may pull a roof permit without a contractor's license, provided the house is their primary residence and no contractor performs the work
- Commercial (including apartments/condos): requires a Class D-2 licensee (no additional test required for this class); must comply with the 2021 IBC and IECC, minimum R-30 insulation above deck
- Mid-roof inspection required on built-up commercial roofs before dry-in and when above-deck insulation or sheathing is installed; ladder must be sound, secured, and extend safely above the eave
Required documents
- RequiredRoofing Permit Application (via ACA portal)Online application through Accela Citizen Access
- OptionalRoofing Guidelines for Commercial and Residential ProjectsCity of Longmont's roofing-specific requirements document covering overlay rules, wind warranty, drip edge, and inspection sequencing
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Roofing Permit (not separately listed in flat-fee table) | Based on actual contract amount of the work applied to the Primary Fee Table | City of Longmont FY2026 Fee Manual: re-roofing is not among the itemized 'Other Permits' flat fees; falls under 'other miscellaneous permits and commercial work not listed above shall be based on actual contract amount of the work from the primary fee table' |
Solar PV Permit
VerifiedRequired for installation of rooftop or ground-mounted solar photovoltaic systems in Longmont. Longmont Power & Communications (LPC) — the city's own municipal electric utility — reviews the interconnection checklist and one-line diagram as part of the building permit process. Fees are statutorily capped for residential/commercial installations under Colorado's Fair Permit Act (SB17-179 / CRS 24-32-3319, commonly referenced by applicants as 'HB 1199').
Verified 2026-06-30 · Source
Requirements
- Solar PV permit application submitted to Longmont Building Services via the ACA portal; required documents also emailed to building.inspection@longmontcolorado.gov
- LPC engineers must review and approve the interconnection checklist and one-line diagram submitted with the building permit application
- Systems up to 50 kW are eligible for LPC's net metering / RGEN rate; systems over 50 kW are reviewed case-by-case with additional requirements
- Expedited 'Solar ABC's Expedited Permit Process' review (5 business-day turnaround) available for complete applications meeting eligibility criteria — installations requiring an electrical service upgrade do NOT qualify for the expedited path
- After installation passes final building inspection, Longmont Building Inspection notifies LPC, which then sets the bi-directional net meter and performs anti-islanding/pre-parallel testing before issuing Permission to Operate (PTO)
- Fees are capped by Colorado's Fair Permit Act: $500 aggregate cap for residential active solar energy system permits, $1,000 for commercial
Required documents
- RequiredSolar PV Permit Application (via ACA portal)Online application through Accela Citizen Access
- RequiredSolar PV Requirements document (showpublisheddocument-30070)City of Longmont's submittal specifications for solar PV permits
- RequiredSmall Generation Interconnection Checklist (LPC)LPC's interconnection checklist and one-line diagram requirements for grid-tied solar systems
- OptionalSolar ABC's Expedited Permit Process criteriaBrooks Engineering-developed criteria used by Longmont to qualify complete applications for 5-business-day expedited review
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Residential Active Solar Energy System — statutory aggregate fee cap | $500.00 maximum (all city permit, plan review, and related fees combined) | Colorado Fair Permit Act (SB17-179, codified at CRS 24-32-3319); referenced by Longmont's Solar PV Systems page as 'Solar PV system fees are capped per House Bill 1199' — the statutory citation is confirmed via the Colorado General Assembly; the informal 'HB 1199' name as used by the city was not independently cross-verified against the bill number |
| Commercial Active Solar Energy System — statutory aggregate fee cap | $1,000.00 maximum | Colorado Fair Permit Act (SB17-179 / CRS 24-32-3319) |
Accessory Dwelling Unit (ADU) Permit
VerifiedRequired for construction of a new attached, detached, or converted ADU in Longmont. Governed by the City's Land Development Code (Sections 15.04.040 and 15.02.080.E) and the Development Services Center ADU Guide, updated December 2025 to reflect changes required by Colorado HB24-1152 (statewide ADU legislation). LPC and Public Works both participate in ADU plan review alongside Building and Planning.
Verified 2026-06-30 · Source
Requirements
- Applicant must provide proof of Longmont residency: valid Colorado driver's license or state ID, plus at least two of: vehicle registration, voter registration, tax return/financial documentation, or a utility bill
- Applicant must own a detached home in Longmont that was legally permitted at time of construction
- Allowed only in zone districts permitting ADUs: Rural Residential (R-RU), Residential-Single Family (R-SF), Residential-Mixed Neighborhood (R-MN), Residential-Multifamily (R-MF), Mixed Use-Downtown (MU-D), Nonresidential-Agricultural (N-AG) — per Table 15.04.020 of the Land Development Code
- HOA covenants cannot prohibit ADUs (now unenforceable); HOA plan review/approval is optional but recommended and should be submitted with the permit application if obtained
- One ADU allowed per lot; up to 800 sq ft regardless of principal dwelling size, OR up to 50% of the principal dwelling's finished above-ground floor area if larger than 800 sq ft
- Total floor area of all accessory structures (including the ADU) capped at 75% of the principal structure's floor area, with specific exemptions for attached/internal ADUs
- Detached ADU height cannot exceed the height of the main house
- 3-foot all-weather (concrete or similar) sidewalk connection required linking the ADU entrance to the adjacent public sidewalk; wayfinding signage required if the ADU entrance isn't visible from the public right-of-way
- Setbacks (new detached ADU): front — not closer than the principal dwelling; rear — 5 ft; side — 5 ft
- ADUs may NOT be sold separately from the principal dwelling, and may NOT be leased/rented for tenancies of less than 30 days (no short-term rentals)
- Mobile homes, RVs, and travel trailers cannot be used as an ADU
- St. Vrain Valley School District fees must be documented as paid (contact Ryan Kragerud, Kragerud_ryan@svvsd.org, 303-682-7317)
Required documents
- RequiredAccessory Dwelling Unit Application (via ACA portal)Distinct ADU application type listed under Applications for Permit
- RequiredDevelopment Services Center Accessory Dwelling Unit Guide (Updated December 2025)City of Longmont's current ADU standards, process steps, and submittal checklists by ADU type (detached / interior-remodel-basement-finish / addition)
- RequiredEngineered, Stamped Foundation Plan and Shear Wall DesignRequired for detached ADUs and additions
- RequiredSurvey / Improvement Location Certificate (ILC)Showing existing structures and all property lines
- RequiredSite SketchExisting structures, proposed structures, drainage, grading, and all property lines
- RequiredEnergy Compliance Path / Manual J, Manual D, Manual SRequired for detached ADUs and additions
- RequiredSoils ReportRequired for detached ADUs and additions
- OptionalAsbestos Testing ReportRequired for interior-remodel/basement-finish or addition ADUs if demolition totals greater than 32 sq ft
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Total City Fees (typical range, all-inclusive) | $5,000–$10,000 | City of Longmont Development Services Center ADU Guide (Updated December 2025): 'Fees paid to the city typically range from $5,000–$10,000 and include plan review and permit fees, City and County taxes, and a number of community investment fees. The costs associated with an ADU are generally 65% less than constructing a new single-family home.' — exact figure depends on project valuation and applicable impact fees per the Primary Fee Schedule |
| Building Permit Fee — valuation-based (same Primary Fee Schedule as new construction) | Varies by valuation — see Residential Building Permit fee tiers | FY2026 Fee Manual; ADUs use the same valuation-based Primary Fee Schedule as other residential construction, plus applicable impact fees (Transportation, Parks, Recreation, Storm Drainage, ECIF) at the same rates as new construction |
Demolition Permit
Required for full or partial demolition of structures in Longmont. Fee is a flat rate distinguishing minor interior demolition from major building demolition.
Reviewed 2026-06-30 · Source
Requirements
- Building permit required for any demolition of a structure
- Interior demolition and major building demolition are tracked as distinct application types on the ACA portal ('Demolition' and 'Interior Demolition')
- Asbestos testing report required if associated demolition totals greater than 32 sq ft (per ADU Guide cross-reference; likely applies more broadly to general demolition though not independently confirmed outside the ADU context)
Required documents
- RequiredDemolition / Interior Demolition Application (via ACA portal)Online application through Accela Citizen Access; distinct forms for full/major demolition vs. interior-only demolition
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Demolition — Minor Interior | $50.00 | City of Longmont FY2026 Fee Manual, Other Permits — Residential/Commercial table |
| Demolition — Major Building | $100.00 | FY2026 Fee Manual |
Commercial Tenant Improvement Permit
VerifiedRequired for interior remodels, additions, and tenant improvements in commercial buildings in Longmont. Reviewed against the 2021 IBC with Longmont amendments and climatic/geographic design criteria; uses the same valuation-based Primary Fee Schedule with a higher commercial plan review rate.
Verified 2026-06-30 · Source
Requirements
- Building permit required for commercial remodel/tenant improvement work
- Applications submitted via the ACA portal under 'Commercial/Industrial Remodel/Addition'
- A combined Commercial Remodel/Tenant Improvement Construction Permit Application & Submittal Checklist is published by Building Services (revised January 2026) and must be followed for submittal completeness
- Commercial plan review fee rate (65% of building permit fee) applies, higher than the 50% residential rate
Required documents
- RequiredCommercial/Industrial Remodel/Addition Application (via ACA portal)Online application through Accela Citizen Access
- RequiredCombined Commercial Remodel/Tenant Improvement Construction Permit Application & Submittal Checklist (Revised 1/13/2026)City of Longmont's current commercial TI submittal checklist
- RequiredFull Construction Drawing SetArchitectural, structural, mechanical, plumbing, electrical plans as applicable to the scope
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee — valuation-based (Primary Fee Schedule) | Per the Primary Fee Schedule — $27.00 minimum, scaling to $6,448.55 + $4.20/$1,000 over $1,000,000 | City of Longmont FY2026 Fee Manual — same table used for residential and commercial |
| Plan Review Fee — commercial | 65% of the Building Permit Fee | FY2026 Fee Manual, Plan Review Fees table |
| Additional Plan Review (changes/revisions to plans) | $47.00 minimum charge (one hour); $47.00/hour for incomplete/changed submittals | FY2026 Fee Manual |
Deck / Covered Patio Permit
Required for construction of decks, patios, sunrooms, pergolas, and similar structures in Longmont. Classified as an 'Addition' under the City's building permit requirements and reviewed against the 2021 IRC and Longmont's climatic/geographic design criteria (30 psf snow load, 30-inch frost depth for footings).
Reviewed 2026-06-30 · Source
Requirements
- Building permit required for patios, sunrooms, decks, pergolas, swimming pools, and accessory buildings greater than 120 sq ft in area
- Accessory buildings 120 sq ft or less still must meet setback requirements even without a building permit
- Retaining walls over 48 inches require a building permit
- Homeowner may self-permit as own contractor on their own property
Required documents
- RequiredMiscellaneous / Residential Remodel-Addition Application (via ACA portal)Online application through Accela Citizen Access
- RequiredSite PlanProperty lines, existing structures, proposed deck/patio footprint, setbacks
- OptionalAccessory Building GuideCity of Longmont's guide covering accessory structure standards (referenced for decks and similar accessory-adjacent structures)
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee — valuation-based (Primary Fee Schedule) | Per the Primary Fee Schedule, based on project valuation | City of Longmont FY2026 Fee Manual — decks/patios are not listed as a separate flat-rate permit type; fee follows the valuation-based Primary Fee Schedule like other additions |
| Plan Review Fee | 50% of the Building Permit Fee | FY2026 Fee Manual |
Sources & verification
Verified against official sources. Last reviewed 2026-06-30.
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 Longmont building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.