City of Nampa Building Permits — The Complete Guide
Nampa's Department of Building Safety issues residential permits in-house with a valuation-based fee schedule (Exhibit A, eff. Mar 1, 2022) and a 65% plan review adder — one of the higher percentages in the Treasure Valley, offset by 1–2 week turnaround. Here is the full workflow.
Quick answer
City of Nampa Department of Building Safety ((208) 468-4430) issues building permits for parcels inside Nampa city limits. Fees use Nampa's Schedule of Permit Fees, Exhibit A (effective March 1, 2022): $369.69 base on the $25k–$50k tier ($9.55 per additional $1,000); $608.44 on the $50k–$100k tier ($6.61 per additional $1,000); $938.94 on the $100k–$500k tier ($5.29 per additional $1,000). Plan review adds 65% of the building permit fee. Turnaround runs 1 to 2 weeks after payment. Portal: cityofnampa.us/428/Residential-Permit-Applications.
Quick answer
The City of Nampa Department of Building Safety. Nampa runs its own in-house building department, handling plan review, permit issuance, and inspection scheduling from City Hall. Main phone (208) 468-4430.
Nampa runs its own in-house building department, with plan review, permit issuance, and inspection scheduling handled from City Hall. Only parcels inside Nampa city limits fall under Nampa authority; rural Canyon County parcels (Middleton fringe, Melba, Marsing area) go through Canyon County Development Services.
Nampa Building Safety at a Glance
- Department
- Department of Building Safety
- County
- Canyon County
- Portal — Residential Applications
- https://www.cityofnampa.us/428/Residential-Permit-Applications
- Fee Schedule
- https://www.cityofnampa.us/167/Permit-Fee-Schedules
- Main phone
- (208) 468-4430
- Fee formula
- Valuation-based. Building-permit fee per the city's Schedule of Permit Fees: $369.69 for the first $25,000 + $9.55 per additional $1,000 (to $50k); $608.44 + $6.61 per $1,000 (to $100k); $938.94 + $5.29 per $1,000 (to $500k). Plan review is 65% of the building-permit fee. Trade (plumbing/mechanical/electrical) sub-permits are charged separately.
- Plan review
- 65% of building permit fee
- Plan review timeline
- Allow 1–2 weeks to process an application after payment is submitted.
- Fee schedule effective date
- Schedule of Permit Fees (Exhibit A, Res 86-2021), eff. Mar 1, 2022
- Source
- City of Nampa Building Safety — Schedule of Permit Fees (Exhibit A to Resolution 86-2021) + Development Services FAQ. The schedule doesn't state how a partial $1,000 of valuation is charged.
When Nampa is the Right Authority
Nampa Building Safety issues your permit only if the parcel is inside Nampa city limits. If your property is in unincorporated Canyon County (rural Nampa/Middleton fringe, Melba, Marsing area), Canyon County Development Services is the correct authority.
Confirm your parcel's jurisdiction at the Canyon County Assessor property lookup.
Canyon County Development ServicesNampa uses a valuation-based Schedule of Permit Fees (Exhibit A, effective March 1, 2022). Plan review adds a flat 65% on top of the building permit fee — one of the higher plan-review percentages in the Treasure Valley.
| Valuation Range | Fee Structure |
|---|---|
| $25,000 – $50,000 | $369.69 for the first $25,000 + $9.55 for each additional $1,000 |
| $50,000 – $100,000 | $608.44 for the first $50,000 + $6.61 for each additional $1,000 |
| $100,000 – $500,000 | $938.94 for the first $100,000 + $5.29 for each additional $1,000 |
Source: City of Nampa Department of Building Safety — Schedule of Permit Fees (Exhibit A), eff. Mar 1, 2022. Plus 65% plan review on the building permit fee. Trade permits (plumbing, mechanical, electrical) separate. Confirm current fees before applying — schedules update.
Plan Review Rate
65%
of the building permit fee. Higher than Boise (20%) and Eagle (35%); comparable to Caldwell's combined 40% + 35%.
Plan Review Turnaround
1–2 weeks
after payment is submitted. Per Nampa Development Services FAQ. Revisions reset the clock.
Worked examples using Exhibit A tiers and the 65% plan review adder. Trade permits (plumbing, electrical, mechanical) and impact fees are listed separately.
Cosmetic kitchen refresh (no permit trigger)
Valuation: N/A
No Nampa permit required for cabinet paint, counter swap at existing sink, appliance swap on existing circuits.
Bathroom remodel — same layout, plumbing rough-in
Valuation: $30,000
$369.69 + $47.75 ($9.55 × 5) = $417.44 building + $271.34 plan review (65%). Trade permits separate.
Kitchen remodel — new circuits, fixture relocation
Valuation: $50,000
$608.44 building (top of $25k–$50k tier) + $395.49 plan review (65%). Trade permits separate.
Primary suite addition (500 sf living area)
Valuation: $180,000
$938.94 + $423.20 ($5.29 × 80) = $1,362.14 building + $885.39 plan review (65%). Impact fees + trade permits separate.
The questions Iron Crest is asked most about Nampa permits. Every fee, timeline, and tier on this page traces back to Nampa's Schedule of Permit Fees (Exhibit A) via the Iron Crest permit-jurisdictions dataset.
Who issues building permits inside the City of Nampa?
The City of Nampa Department of Building Safety. Nampa runs its own in-house building department, handling plan review, permit issuance, and inspection scheduling from City Hall. Main phone (208) 468-4430. Portal: cityofnampa.us/428/Residential-Permit-Applications for residential permits and cityofnampa.us/167/Permit-Fee-Schedules for the fee schedule. If your parcel sits outside Nampa city limits (rural Canyon County acreage between Nampa and Middleton, or between Nampa and Melba), Canyon County Development Services is the correct authority. The Canyon County Assessor parcel record confirms the correct jurisdiction.
How are Nampa residential building permit fees calculated?
Nampa uses a valuation-based Schedule of Permit Fees (Exhibit A, effective March 1, 2022). The building permit fee tiers: $25,000–$50,000 valuation = $369.69 for the first $25,000 plus $9.55 for each additional $1,000; $50,000–$100,000 = $608.44 plus $6.61 for each additional $1,000; $100,000–$500,000 = $938.94 plus $5.29 for each additional $1,000. Plan review adds 65% of the building permit fee — one of the higher plan-review percentages in the Treasure Valley (vs. Boise 20%, Meridian no separate residential percentage, Eagle 35%, Caldwell 40% + 35% planning + 20% engineering). Trade sub-permits (plumbing, mechanical, electrical) are charged separately.
How long does Nampa plan review take?
Nampa's Development Services FAQ states: allow 1 to 2 weeks to process a permit application after payment is submitted. This is materially faster than Eagle (~6 weeks) and comparable to Boise, Meridian, and Caldwell. Iron Crest builds 1 to 2 weeks of Nampa permit lead time into every project schedule. Revisions reset the clock — any change of scope after submittal restarts the review timer. On kitchen and bath remodels with clean scope and no structural changes, Nampa typically clears review at the fast end of the range.
Why does Nampa charge 65% plan review when Boise only charges 20%?
The plan-review percentage each Idaho jurisdiction charges reflects its own department budget model and workload — it is not a state-mandated figure. Nampa's 65% plan review on the building permit fee is on the high end of Treasure Valley cities (Boise 20%, Meridian no separate residential percentage, Eagle 35%, Caldwell 40% + 35% planning + 20% engineering review, Garden City 50% over $20K). What this means in practice: for the same $50,000 kitchen remodel, Nampa charges more in plan review than Boise, but Nampa's base building permit fee tier ($369.69 base + increments) tends to price in the same range as Boise's Table 1-A. The total paper cost is closer than the plan-review percentage alone suggests — but Nampa is typically not the cheapest jurisdiction for larger projects. Always run the actual valuation through the current fee schedule.
Are sub-permits for plumbing, electrical, and mechanical separate in Nampa?
Yes. Nampa itemizes trade permits (plumbing, mechanical, electrical) separately from the base building permit. Additionally, under Idaho law, plumbing (§ 54-2601) and electrical (§ 54-1001) are state-licensed trades — the licensed plumber or electrician on the project pulls the trade permit through the state licensing framework. Mechanical permits are typically issued alongside the building permit. On any kitchen or bath project with new plumbing lines, added or moved electrical circuits, or new HVAC ductwork, expect a permit for each trade. Iron Crest coordinates the full permit stack on client projects.
What building code does Nampa use?
Nampa applies the 2018 International Residential Code (IRC) as adopted statewide by Idaho Code § 39-4109. IRC chapters that matter most for kitchen and bath remodels: R303 (natural light and ventilation, including bath exhaust CFM), R311 and R312 (stairways, guards, handrails), R403.1.4.1 (footing depth — Treasure Valley design 24 inches for heated structures), M1503 (kitchen range hood and make-up air), and P2905 (water supply pipe sizing). Nampa may have local amendments — confirm current code adoption with the Department of Building Safety at design time.
Does Nampa require a permit for interior cosmetic work?
No. Like the rest of Idaho, Nampa exempts cosmetic-only interior work. Cabinet paint or door swap on the same footprint, countertop replacement without moving plumbing, faucet or fixture swap at existing rough-ins, appliance swap on matching electrical service, flooring replacement without subfloor structural work, tile backsplash without backer-board removal, and interior paint do not require a Nampa permit. Once scope adds new plumbing supply or drain, new or modified electrical circuits, or any structural change (wall removal, new opening, new beam), permit territory begins.
What Nampa neighborhoods and subdivisions have HOA architectural review?
Nampa has fewer high-friction HOA subdivisions than Meridian or Eagle, but planned developments on the east and north sides of the city — closer to the Meridian border — do have architectural committees. HOA architectural review generally applies only to exterior-visible work: siding, roof, windows, deck, addition footprint, exterior lighting. Interior kitchen and bathroom remodels almost never trigger HOA review. When both apply, run the HOA submission in parallel with the Nampa plan review rather than in series — the two paths typically fit inside Nampa's 1–2 week window.
What does a typical Nampa kitchen or bath remodel cost in permits?
For a $30,000 bathroom remodel in Nampa: building permit = $369.69 base + $47.75 ($9.55 × 5) = $417.44, plus 65% plan review = $271.34, for a paper total of about $689 before trade permits. For a $50,000 kitchen remodel: building permit = $608.44 base (top of the $25k–$50k tier), plus 65% plan review = $395.49, total about $1,004 before trades. Trade permits (plumbing, electrical, mechanical) typically add $150–$400 combined. Larger projects: for a $180,000 addition, building permit = $938.94 + $423.20 ($5.29 × 80) = $1,362.14 + 65% plan review = $885.39, total about $2,247 before trades and impact fees.
Does Iron Crest Remodel pull City of Nampa permits directly?
Yes. Iron Crest Remodel is Idaho-registered (RCE-6681702) and pulls Nampa Department of Building Safety permits for projects inside Nampa city limits — kitchens, bathrooms, tub-to-shower conversions, and structural interior work across Nampa's east side, west side, and downtown neighborhoods. We handle the residential permit application, valuation input, plan set, plan-review response, and inspection scheduling. Nampa is inside Iron Crest's regular Treasure Valley service area alongside Boise, Meridian, Eagle, Caldwell, Kuna, Middleton, and Emmett.
Nampa Residential Permit Applications
Application forms and submittal instructions for residential permits.
Nampa Permit Fee Schedules
Schedule of Permit Fees (Exhibit A), effective March 1, 2022.
Idaho Code § 39-4109 (statewide code adoption)
Idaho adopts the 2018 IRC statewide. Nampa applies it with local amendments.
Idaho Code § 54-1001 (electrical licensing)
Electrical is a state-licensed trade in Idaho — pulled outside Nampa's fee schedule.
Idaho Code § 54-2601 (plumbing licensing)
Plumbing is a state-licensed trade in Idaho — pulled outside Nampa's fee schedule.
Iron Crest Treasure Valley Permit Guide
Side-by-side jurisdiction comparison across Ada and Canyon counties.
Remodeling Inside Nampa City Limits?
Iron Crest Remodel (RCE-6681702) pulls Nampa Department of Building Safety permits for kitchens, bathrooms, tub-to-shower conversions, and structural interior work. Plan set, valuation, application, and inspection scheduling handled end-to-end.