You are viewing the permanent link for the record currently in effect, published 2026-06-29.
Nampa building permits
VerifiedNampa, Idaho — as published 2026-06-29.
Verified 2026-06-29 · Source
Codes adopted
2018 International Residential Code (IRC)2018 International Building Code (IBC)2018 International Existing Building Code (IEBC)2018 International Fire Code (IFC)2018 International Energy Conservation Code (IECC) — Residential and Commercial2018 International Mechanical Code (IMC)2018 International Fuel Gas Code (IFGC)2017 Idaho State Plumbing Code2023 National Electrical Code (NEC)2009 ICC/ANSI/A117.1 (Accessibility)2015 NFPA A30 Code for Motor Fuel Dispensing Facilities and Repair Garages2015 NFPA 99 Health Care Facilities Code
Permit types & fees
Residential Building Permit (New Construction)
VerifiedRequired for all new one- and two-family dwellings in Nampa. Covers new single-family homes, duplexes, and associated systems. Apply online through the CSS portal or in person at 500 12th Ave S.
Verified 2026-06-29 · Source
Requirements
- Verify proposed use with Planning & Zoning before applying
- Submit application through CSS online portal or in person
- Plans must comply with 2018 IRC and 2018 IECC
- Planning & Zoning Initial Review of Compliance required before submittal
- Approved plans must remain on site during all inspections
- Permit communication sent via email from noreply@cityofnampa.us — do not mark as spam
Required documents
- RequiredNew Residential Building Permit Application & Checklist (Feb 2026)Official Nampa building permit application and submittal checklist for new residential construction; available at cityofnampa.us/DocumentCenter/View/20380
- RequiredConstruction DrawingsComplete plan set including site plan, floor plans, elevations, sections, and structural details
- RequiredEnergy Code Compliance DocumentationRescheck or equivalent demonstrating compliance with 2018 IECC
- OptionalIECC System Commissioning FormRequired for HVAC commissioning per 2018 IECC; available on city website
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit — valuation $1 to $500 | $22.20 flat | Nampa Exhibit A Schedule of Permit Fees (Dec 21, 2021) |
| Building Permit — valuation $501 to $2,000 | $22.20 for first $500, plus $2.88 per each additional $100 | — |
| Building Permit — valuation $2,001 to $25,000 | $65.40 for first $2,000, plus $13.23 per each additional $1,000 | — |
| Building Permit — valuation $25,001 to $50,000 | $369.69 for first $25,000, plus $9.55 per each additional $1,000 | — |
| Building Permit — valuation $50,001 to $100,000 | $608.44 for first $50,000, plus $6.61 per each additional $1,000 | — |
| Building Permit — valuation $100,001 to $500,000 | $938.94 for first $100,000, plus $5.29 per each additional $1,000 | — |
| Plan Review Fee | 65% of the building permit fee | Assessed at intake; Nampa Exhibit A item 6 |
| New Residential (R-3/R-4) Plumbing/Mechanical/Electrical sub-permit — under 2,000 sq ft habitable area | $180.00 per dwelling unit | Nampa Exhibit A — New Group R sub-contractor permit fee |
| New Residential (R-3/R-4) Plumbing/Mechanical/Electrical sub-permit — 2,000+ sq ft habitable area | $325.00 per dwelling unit | — |
| Reinspection (after first reinspection for same item) | $55.00 flat fee | — |
Residential Addition / Remodel Permit
VerifiedRequired for additions, remodels, and structural alterations to existing one- and two-family dwellings in Nampa. Covers room additions, garage conversions, basement finishes, deck construction, and structural modifications.
Verified 2026-06-29 · Source
Requirements
- Finishing an attic, garage, or basement to create living space
- Adding a room, garage, carport, or attached structure
- Moving, removing, or adding walls
- Decks more than 12 inches above grade
- Retaining walls 4 feet or more in height (bottom of footing to top of wall), or 2-foot retaining walls with a slope/surcharge
- Build or enclose a patio cover, porch, or carport
- Replacement of windows or doors where the opening is structurally modified
Required documents
- RequiredResidential Addition Building Permit Application & Checklist (Oct 2024)Official Nampa addition permit application; available at cityofnampa.us/DocumentCenter/View/18792
- OptionalResidential Remodel Permit Application & Checklist (Oct 2024)For remodel scope; available at cityofnampa.us/DocumentCenter/View/18793
- RequiredConstruction DrawingsPlans showing scope of work, dimensions, structural details, and connection to existing structure
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit — valuation-based per Exhibit A Table | $22.20 (≤$500); $22.20 + $2.88/$100 ($501–$2,000); $65.40 + $13.23/$1,000 ($2,001–$25,000); $369.69 + $9.55/$1,000 ($25,001–$50,000); etc. | Nampa Exhibit A Schedule of Permit Fees (Dec 2021) |
| Plan Review Fee | 65% of the building permit fee | Assessed at intake |
| Plumbing extras (additions/remodels) — fixtures | $36.00 base + $15.00 per fixture | Nampa Exhibit A — Miscellaneous Fees for Plumbing sub-trade permits |
| Electrical extras (additions/remodels) — each circuit extension | $36.00 base + $15.00 per circuit extension | Nampa Exhibit A — Miscellaneous Fees for Electrical sub-trade permits |
| Mechanical extras (additions/remodels) — equipment | $36.00 base + $15.00 per piece of mechanical equipment | Nampa Exhibit A — Miscellaneous Fees for Mechanical sub-trade permits |
| Reinspection (after first reinspection for same item) | $55.00 flat fee | — |
Residential Electrical Permit
VerifiedRequired for all electrical wiring installations, equipment changes, or wiring modifications in Nampa residences, including panel upgrades, new circuits, service changes, and EV charger installations. All work must comply with the 2023 National Electrical Code.
Verified 2026-06-29 · Source
Requirements
- All electrical wiring installations, equipment changes, or any wiring installations require a permit before commencing work
- Work must be performed by a state-licensed journeyman electrician employed by a state-licensed electrical contractor
- Homeowner exception: owner of a single-family or two-family dwelling (R-3/U-1 occupancy) may perform own electrical work if residing in the dwelling within 12 months after completion
- Hardship exception: immediate family member may perform work for a family member unable to perform it themselves
Required documents
- RequiredElectrical Permit Application (2024)Nampa Building Department electrical permit application; available at cityofnampa.us/DocumentCenter/View/18813
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| New residential dwelling (R-3/R-4) electrical — under 2,000 sq ft habitable area | $180.00 per dwelling unit | Nampa Exhibit A — New Group R sub-contractor permit fee (includes plumbing, electrical, and mechanical under same flat rate) |
| New residential dwelling (R-3/R-4) electrical — 2,000+ sq ft habitable area | $325.00 per dwelling unit | — |
| Residential electrical (additions/remodels) — base fee | $36.00 base | Nampa Exhibit A — base fee applies to all residential sub-trade permits for additions/remodels |
| Main or sub-main electrical service (residential, additions/remodels) | $55.00 | Nampa Exhibit A — Electrical Extras: 'Main and Sub-Main electrical services (residential only) $55.00' |
| Each circuit extension (residential, additions/remodels) | $15.00 per circuit | Nampa Exhibit A — Electrical Extras |
| Miscellaneous electrical equipment (residential, additions/remodels) | $15.00 per item | Nampa Exhibit A — Electrical Extras |
| Temporary electrical service (residential only) | $55.00 | Nampa Exhibit A — Electrical Extras |
| Reinspection (after first reinspection for same item) | $55.00 flat fee | — |
Residential Plumbing Permit
VerifiedRequired for all plumbing piping and drainage work in Nampa residences, including fixture additions, water and sewer line work, and water heater replacements. Governed by the 2017 Idaho State Plumbing Code.
Verified 2026-06-29 · Source
Requirements
- All plumbing piping and drainage work except emergency repairs to leaks or replacing broken fixtures in kind
- Must be performed by a state-licensed journeyman plumber employed by an Idaho-licensed plumbing contractor
- Excavation contractors for sewer/water service lines outside the building envelope must hold Idaho health district septic certification or Idaho public works excavator license
- Homeowner exception: owner of R-3/U-1 occupancy may perform own plumbing if residing in dwelling within 180 days after completion
- Hardship exception: immediate family member may perform work for family member unable to do so
Required documents
- RequiredPlumbing Permit Application (2024)Nampa Building Department plumbing permit application; available at cityofnampa.us/DocumentCenter/View/18815
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| New residential dwelling (R-3/R-4) plumbing — under 2,000 sq ft habitable area | $180.00 per dwelling unit | Nampa Exhibit A — New Group R sub-contractor permit fee (covers installations within the dwelling unit) |
| New residential dwelling (R-3/R-4) plumbing — 2,000+ sq ft habitable area | $325.00 per dwelling unit | — |
| Residential plumbing (additions/remodels) — base fee | $36.00 base | Nampa Exhibit A — base fee for all residential sub-trade addition/remodel permits |
| Sewer line (new or replacement) | $55.00 | Nampa Exhibit A — Plumbing Extras |
| Water line (new or replacement) | $55.00 | Nampa Exhibit A — Plumbing Extras |
| Fixtures (additions and remodels) — per fixture | $15.00 per fixture | Nampa Exhibit A — Plumbing Extras; applies per toilet, sink, shower, bathtub, water heater, etc. |
| Reinspection (after first reinspection for same item) | $55.00 flat fee | — |
Residential Mechanical / HVAC Permit
VerifiedRequired for all mechanical equipment installations in Nampa residences, including furnaces, air conditioners, heat pumps, gas piping, ductwork, gas fireplaces, and HVAC replacements. Governed by the 2018 International Mechanical Code and 2018 International Fuel Gas Code.
Verified 2026-06-29 · Source
Requirements
- All mechanical equipment installations require a permit before work begins
- Must be performed by a licensed mechanical contractor holding a valid Idaho Contractor's License
- Gas piping installers must hold a state of Idaho gas piping license
- Homeowner exception: owner of R-3/R-4/U occupancy may perform own mechanical work if residing in dwelling within 180 days after completion
- Hardship exception: immediate family member may perform work for family member unable to do so
- Unvented gas fireplaces require supplemental whole-house ventilation strategy (Nampa local amendment to IMC section 903)
Required documents
- RequiredMechanical Permit Application (2024)Nampa Building Department mechanical permit application; available at cityofnampa.us/DocumentCenter/View/18814
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| New residential dwelling (R-3/R-4) mechanical — under 2,000 sq ft habitable area | $180.00 per dwelling unit | Nampa Exhibit A — New Group R sub-contractor permit fee (covers installations within the dwelling unit) |
| New residential dwelling (R-3/R-4) mechanical — 2,000+ sq ft habitable area | $325.00 per dwelling unit | — |
| Residential mechanical (additions/remodels) — base fee | $36.00 base | Nampa Exhibit A — base fee for all residential sub-trade addition/remodel permits |
| Mechanical equipment (residential, additions/remodels) — per appliance | $15.00 per piece of equipment | Nampa Exhibit A — Mechanical Extras: 'Mechanical equipment (residential only) $15.00' |
| Venting without new appliance (residential only) | $15.00 | Nampa Exhibit A — Mechanical Extras |
| Gas piping pressure test | $15.00 | Nampa Exhibit A — Mechanical Extras |
| Reinspection (after first reinspection for same item) | $55.00 flat fee | — |
Residential Roofing Permit (Re-roof)
VerifiedRequired for re-roofing existing residential structures in Nampa, including both overlay and complete tear-off/re-roof projects. Also required for replacement of siding or stucco on existing homes.
Verified 2026-06-29 · Source
Requirements
- Complete roof replacement (tear-off and re-roof)
- Re-roofing overlay
- Replacement of siding or stucco on existing house
Required documents
- RequiredResidential Reroof Permit ApplicationNampa Building Department reroof application; available at cityofnampa.us/DocumentCenter/View/18246
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Residential Reroof — building permit (valuation-based) | Per Exhibit A valuation table; residential re-roofs typically fall in $22.20–$65.40 range for most projects | Nampa Exhibit A Schedule of Permit Fees (Dec 2021) |
| Plan Review Fee | 65% of the building permit fee | Assessed at intake |
| Reinspection (after first reinspection for same item) | $55.00 flat fee | — |
Solar Photovoltaic (PV) Permit
VerifiedRequired for installation of rooftop or ground-mounted solar photovoltaic systems on residential properties in Nampa. A dedicated Solar Permit Application packet is available from the city.
Verified 2026-06-29 · Source
Requirements
- Rooftop solar panel installation
- Ground-mounted solar array installation
- Submit the Nampa Solar Permit Application packet
- Electrical work must comply with 2023 NEC
- Structural roof load calculations required
Required documents
- RequiredResidential Solar Permit Application PacketNampa's dedicated solar permit application packet; available at cityofnampa.us/DocumentCenter/View/15796
- RequiredSolar Site PlanRoof plan or ground layout showing panel placement and access pathways
- RequiredElectrical Single-Line DiagramSystem wiring from panels to inverter to main panel
- RequiredStructural Analysis / Roof Load CalculationConfirming existing roof structure can support panel weight; roof snow load in Nampa is 25 PSF minimum
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Solar permit — building permit (valuation-based) | Per Exhibit A valuation table based on project value | Nampa Exhibit A Schedule of Permit Fees (Dec 2021) |
| Plan Review Fee | 65% of the building permit fee | Assessed at intake |
| Electrical sub-permit for solar wiring (additions/remodels) | $36.00 base + $15.00 per circuit extension + $15.00 miscellaneous equipment | Nampa Exhibit A — Electrical Extras |
| Reinspection (after first reinspection for same item) | $55.00 flat fee | — |
Electric Vehicle (EV) Charger Permit
VerifiedNampa does not publish a separate EV-charger permit type, but its Residential Electrical Permit page explicitly names EV charger installations as covered work: the permit is 'required for all electrical wiring installations, equipment changes, or wiring modifications in Nampa residences, including panel upgrades, new circuits, service changes, and EV charger installations.' Work must comply with the 2023 NEC and is billed under the same Electrical Extras fee lines used for any new circuit, service, or equipment addition.
Verified 2026-07-20 · Source
Requirements
- A permit is required before commencing any EV charger installation, whether it is a new dedicated circuit, an equipment/outlet addition, or a panel/service upgrade
- Work must be performed by a state-licensed journeyman electrician employed by a state-licensed electrical contractor, per the 2023 National Electrical Code
- Homeowner exception: the owner of a single-family or two-family (R-3/U-1) dwelling may perform the EV charger circuit work themselves if residing in the dwelling within 12 months after completion
- Apply via the Electrical Permit Application (2024) form to the Nampa Building Department
Required documents
- RequiredElectrical Permit Application (2024)Nampa Building Department electrical permit application; describe scope as EV charger installation (new circuit/equipment or service upgrade)
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Residential electrical (additions/remodels) — base fee | $36.00 base | Nampa Exhibit A — base fee applies to all residential sub-trade permits for additions/remodels, including an EV charger circuit |
| Each circuit extension (residential, additions/remodels) — applies to a new dedicated EV charger circuit | $15.00 per circuit | Nampa Exhibit A — Electrical Extras |
| Miscellaneous electrical equipment (residential, additions/remodels) — applies to the EV charger unit itself | $15.00 per item | Nampa Exhibit A — Electrical Extras |
| Main or sub-main electrical service (residential, additions/remodels) — applies if a panel/service upgrade is needed for a higher-amperage Level 2 charger | $55.00 | Nampa Exhibit A — Electrical Extras |
Accessory Dwelling Unit (ADU) Permit
VerifiedRequired for construction of a new accessory dwelling unit on a residential property in Nampa. Nampa provides a dedicated ADU Building Permit Application & Checklist.
Verified 2026-06-29 · Source
Requirements
- Verify ADU is permitted in the property's zoning district with Planning & Zoning
- Submit Residential ADU Building Application & Checklist
- Plans must comply with 2018 IRC
- Trade sub-permits (electrical, plumbing, mechanical) required separately
Required documents
- RequiredResidential ADU Building Application & Checklist (Oct 2024)Nampa's dedicated ADU permit application and checklist; available at cityofnampa.us/DocumentCenter/View/18798
- RequiredConstruction DrawingsFull construction drawings including site plan, floor plans, elevations, and structural details
- RequiredEnergy Code Compliance DocumentationRescheck or equivalent demonstrating 2018 IECC compliance for the ADU
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| ADU Building Permit — valuation-based per Exhibit A | Per Nampa Exhibit A valuation table; plan review is 65% of permit fee | Nampa Exhibit A Schedule of Permit Fees (Dec 2021) |
| Reinspection (after first reinspection for same item) | $55.00 flat fee | — |
Accessory Structure Permit
VerifiedRequired for detached sheds, garages, barns, pole barns, and similar accessory structures on residential properties in Nampa when the structure exceeds 200 square feet. Structures of any size require a permit if hardwired with a 120V electrical system.
Verified 2026-06-29 · Source
Requirements
- Detached accessory structure exceeding 200 square feet requires a building permit
- Any structure hardwired with a 120V electrical system requires a permit regardless of size
- Structures under 200 sq ft with no electrical do not require a permit (confirm with Planning & Zoning re: setbacks and easements)
- Pole barn type structures require structural engineering by an Idaho-licensed engineer
- Standalone gazebo/pergola structures exceeding 200 sq ft require a permit
Required documents
- RequiredAccessory Structure Permit Application & Checklist (Oct 2024)Nampa's dedicated accessory structure application; available at cityofnampa.us/DocumentCenter/View/18803
- OptionalPole Barn HandoutNampa guidance for pole barn construction; available at cityofnampa.us/DocumentCenter/View/15867
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Accessory Structure — building permit (valuation-based) | Per Exhibit A valuation table; plan review is 65% of permit fee | Nampa Exhibit A Schedule of Permit Fees (Dec 2021) |
| Reinspection (after first reinspection for same item) | $55.00 flat fee | — |
Residential Pool Permit
VerifiedRequired for in-ground and above-ground swimming pools on residential properties in Nampa when the pool exceeds 48 inches in depth or 5,000 gallons. Prefabricated above-ground pools less than 48 inches deep and under 5,000 gallons accessory to an R-3 occupancy are exempt from permit requirements.
Verified 2026-06-29 · Source
Requirements
- In-ground swimming pools require a building permit
- Above-ground pools exceeding 48 inches in depth or 5,000 gallons require a permit
- Prefabricated above-ground pools less than 48 inches deep, under 5,000 gallons, installed entirely above ground, accessory to R-3 — exempt
- Electrical work for pool bonding and pump requires a separate electrical permit
- Fencing around pool required per IRC
Required documents
- RequiredResidential Pool Permit Application & Checklist (Oct 2024)Nampa's dedicated pool permit application; available at cityofnampa.us/DocumentCenter/View/18794
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Pool permit — building permit (valuation-based) | Per Exhibit A valuation table; plan review is 65% of permit fee | Nampa Exhibit A Schedule of Permit Fees (Dec 2021) |
| Reinspection (after first reinspection for same item) | $55.00 flat fee | — |
Commercial Building Permit (New Construction & Additions)
VerifiedRequired for new commercial building structures (complete buildings or shell buildings) and for additions to existing commercial buildings in Nampa. Apply via the New Commercial Permit Application (or New Commercial Shell Application for shell-only projects) through the CSS online portal; a Planning & Zoning Initial Review of Compliance is required before submittal.
Verified 2026-08-02 · Source
Requirements
- Verify the proposed use and obtain Planning & Zoning's Initial Review of Compliance approval before submitting the building permit application
- Submit the New Commercial Permit Application (or New Commercial Shell Application for a shell-only building, or Commercial Addition Application for an addition) through the CSS online portal
- Plans must comply with the city's current adopted codes: 2018 IBC, 2018 IECC (commercial), 2018 IMC, 2018 IFGC, 2023 NEC, 2017 Idaho State Plumbing Code, 2009 ICC/ANSI/A117.1, and City Ordinances
- All plan sets must be Arch D size (24 by 36 inches) and drawn to scale; architectural sheets must be stamped by an Idaho-licensed architect; structural, mechanical, electrical, and plumbing sheets must be stamped by an Idaho-licensed engineer
- A registered building contractor or the building owner may purchase the building permit; licensed Mechanical, Electrical, and Plumbing contractors must separately purchase their own trade permits — homeowner (residential) permits are not valid for commercial work
- Applicant must certify an Idaho Contractor Registration Number (per Idaho Code 54-5209) or certify an exemption under Idaho Code 54-5205 on the application
- Submit a Statement of Special Inspections (as a standalone document or noted on the plan set) whenever structural special inspections are required
- Project value declared on the application must include the total construction cost plus all improvements within the building — finish work, painting, roofing, electrical, plumbing, HVAC, elevators, fire extinguishing systems — and on-site improvements such as paving, sidewalks, ramps, stairs, utilities, grading, and site prep
Required documents
- RequiredNew Commercial Permit Application (Feb 2026)Nampa's commercial building permit application for new complete buildings and additions; collects project value, IBC construction type, occupancy group, building height/stories, elevator count, fire sprinkler/alarm status, and the full project team (applicant, owner, contractor, tenant, foreman, design professional, structural/civil engineer, landscape architect). Available at cityofnampa.us/DocumentCenter/View/20273
- OptionalNew Commercial Shell ApplicationAlternate application for a shell-only (core-and-shell) commercial building with no tenant designated yet; available at cityofnampa.us/DocumentCenter/View/19175
- RequiredCommercial Building Permit Checklist (revised Nov 5, 2024)Nampa's full submittal checklist covering architectural, structural, electrical, mechanical, and plumbing plans, plus waste water data disclosure, floodplain, soils report, civil site plan, grading plan, traffic study, storm drainage calculations, storm water O&M plan, and landscape plan requirements as applicable; available at cityofnampa.us/DocumentCenter/View/19171
- RequiredPlanning & Zoning Initial Review of ComplianceConfirms the proposed project complies with zoning entitlements, development agreement, and design review conditions; must be completed before the building permit submittal
- OptionalStatement of Special InspectionsRequired for structural special inspections on commercial projects; may be a standalone submittal or noted on the plan set. Available at cityofnampa.us/DocumentCenter/View/18730
- RequiredEnergy Code Compliance (Commercial ComCheck)ComCheck reports for the building envelope, mechanical system, and interior/exterior lighting systems, required per 2018 IECC
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit — valuation $1 to $500 | $22.20 flat | Nampa Exhibit A Schedule of Permit Fees (Dec 21, 2021); same valuation table applies to building permits for all occupancies unless otherwise stated |
| Building Permit — valuation $501 to $2,000 | $22.20 for first $500, plus $2.88 per each additional $100 | — |
| Building Permit — valuation $2,001 to $25,000 | $65.40 for first $2,000, plus $13.23 per each additional $1,000 | — |
| Building Permit — valuation $25,001 to $50,000 | $369.69 for first $25,000, plus $9.55 per each additional $1,000 | — |
| Building Permit — valuation $50,001 to $100,000 | $608.44 for first $50,000, plus $6.61 per each additional $1,000 | — |
| Building Permit — valuation $100,001 to $500,000 | $938.94 for first $100,000, plus $5.29 per each additional $1,000 | — |
| Building Permit — valuation $500,001 to $1,000,000 | $3,054.94 for first $500,000, plus $4.49 per each additional $1,000 | Commercial projects are far more likely than residential ones to reach this tier |
| Building Permit — valuation $1,000,000 and up | $5,299.94 for first $1,000,000, plus $3.45 per each additional $1,000 | — |
| Plan Review Fee | 65% of the building permit fee | Nampa Exhibit A item 5: 'Plan review fees for all Building Occupancies shall be assessed at 65% of the building permit fee'; invoiced at intake |
| Commercial MEP sub-contractor permit — valuation-based | 2.68% of project value up to $20,000; $536.00 plus 1.61% of the portion exceeding $20,000 (up to $50,000); $1,019.00 plus 0.80% of the portion exceeding $50,000 (up to $100,000); $1,419.00 plus 0.54% of the portion exceeding $100,000 above that | Nampa Exhibit A — Commercial Project Subcontractor Scope of Work Valuation Table, quoted as printed. The source PDF's own top bracket is labeled 'Project value over $1,000,000' even though the formula continues from the $100,000 breakpoint — an apparent labeling inconsistency in the city's own Dec 21, 2021 document, reproduced here rather than silently corrected. Add the $36.00 base fee below. |
| Commercial sub-trade Base Permit Fee | $36.00 | Applies to all MEP permits in this section per Nampa Exhibit A |
| Reinspection (after first reinspection for same item) | $55.00 flat fee | — |
| Inspections outside normal business hours | $72.00 per hour (one hour minimum) | Nampa Exhibit A Miscellaneous Fees |
| Plan review for revisions after the second plan review, or for revisions after permit issuance | $72.00 per hour (one hour minimum) | Nampa Exhibit A Miscellaneous Fees |
Commercial Tenant Improvement (TI) Permit
VerifiedRequired for finishing or remodeling an existing commercial building or tenant lease space in Nampa, and for any change of occupancy classification. Nampa issues four related products depending on the scenario: a Tenant Improvement permit ending in a Certificate of Completion (no new tenant), a Tenant Improvement (Occupancy Only) permit for a new shell/complete building with a tenant already designated, a Tenant Improvement permit ending in a Certificate of Occupancy (new tenant or occupancy-classification change), and a construction-free Certificate of Occupancy Only application for a like-for-like change of tenant or owner with no occupancy-classification change.
Verified 2026-08-02 · Source
Requirements
- A TI permit is required for tenant improvements, including finishing or remodeling of an existing building or tenant space, per Nampa's Commercial FAQ
- A TI permit is also required for any Change of Occupancy for an existing commercial building or tenant space, even without significant remodeling
- Per Nampa's Commercial FAQ, changes to or within certain use categories always require a TI permit due to differing code requirements: hospitals, medical or dental offices, custodial care and halfway houses, daycares, schools, hair salons, barbershops, restaurants, assembly uses, and storage or factory uses
- A simple change of tenant or building owner with no change in occupancy classification and no remodeling may instead use a Certificate of Occupancy Only application in place of a full TI permit (the FAQ's own example: a law office converting to an accounting office)
- Obtain any necessary entitlements for the specific tenant use from Planning & Zoning — they determine whether the use is allowed or requires a Conditional Use Permit — before or at submittal
- Tenant identity, specific use, and occupancy classification must be provided at the time of TI application
- A registered building contractor or the building owner may apply; licensed Mechanical, Electrical, and Plumbing contractors must separately purchase their own trade permits for MEP work
- A separate sign permit, installed by an Idaho-registered contractor and obtained through Planning & Zoning, is required after the TI if new signage is planned
Required documents
- RequiredCommercial Tenant Improvement ApplicationStandard TI application for remodeling an existing building or tenant space, ending in a Certificate of Completion or Certificate of Occupancy depending on scenario; available at cityofnampa.us/DocumentCenter/View/19176
- OptionalCommercial Tenant Improvement Occupancy Only Application (Dec 2025)For a TI to a new shell or new complete building where a tenant is already designated at the time of application; available at cityofnampa.us/DocumentCenter/View/20131
- OptionalCertificate of Occupancy Only Application (Feb 2023)For a like-for-like change of tenant or building owner with no occupancy-classification change and no construction — used instead of a full TI permit; available at cityofnampa.us/DocumentCenter/View/16279
- RequiredCommercial Building Permit Checklist (revised Nov 5, 2024)Applies to TI plan submittals for the applicable scope of work — architectural, structural, electrical, mechanical, and/or plumbing plans depending on what the tenant improvement touches; available at cityofnampa.us/DocumentCenter/View/19171
- OptionalEnergy Code Compliance (ComCheck)Required if the tenant improvement alters the building envelope, mechanical systems, or lighting, per 2018 IECC
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit — valuation-based per Nampa Exhibit A Schedule of Permit Fees | $22.20 flat (≤$500) up to $5,299.94 for the first $1,000,000 plus $3.45 per additional $1,000 above that — same valuation table used for all Nampa building permits | Nampa Exhibit A Schedule of Permit Fees (Dec 21, 2021); applies unless otherwise stated |
| Plan Review Fee | 65% of the building permit fee | Nampa Exhibit A item 5: assessed for all Building Occupancies, invoiced at intake |
| Commercial MEP sub-contractor permit — valuation-based | 2.68% of project value up to $20,000; $536.00 plus 1.61% of the portion exceeding $20,000 (up to $50,000); $1,019.00 plus 0.80% of the portion exceeding $50,000 (up to $100,000); $1,419.00 plus 0.54% of the portion exceeding $100,000 above that | Nampa Exhibit A — Commercial Project Subcontractor Scope of Work Valuation Table, quoted as printed (the source's own top-bracket label reads 'over $1,000,000' though the formula continues from the $100,000 breakpoint — reproduced as-is rather than silently corrected). Add the $36.00 base fee below. |
| Commercial sub-trade Base Permit Fee | $36.00 | Applies to all MEP permits in this section per Nampa Exhibit A |
| Reinspection (after first reinspection for same item) | $55.00 flat fee | — |
Sources & verification
Verified against official sources. Last reviewed 2026-06-29.
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 Nampa building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.