How are building permit fees calculated in the Treasure Valley?

Almost every city and county in the Treasure Valley uses valuation-based permit fees, not a flat per-project charge. The jurisdiction sets a construction valuation for your project (often from the International Code Council's Building Valuation Data, or your stated project cost, whichever is greater), then applies a fee schedule of base amounts plus a per-$1,000 increment. A separate plan-review fee — commonly 20% to 50% of the permit fee depending on the city — is usually added. Because each jurisdiction adopts its own schedule and updates it periodically, the only reliable number is the one on the issuing department's current schedule, which we link for each city below.

How long does building permit review take in the Boise area?

It varies widely by jurisdiction and project size. Published residential first-review turnarounds we verified range from about 7–10 business days (Meridian, Caldwell, Boise targets) to roughly 4–6 weeks (Eagle, larger Star projects). Counties and some cities don't publish a fixed timeline at all. Revisions reset the clock, and actual times move with the department's workload — always confirm current turnaround with the issuing office before committing to a schedule.

Does a remodel always require a building permit?

Not always — but most structural, electrical, plumbing, mechanical, and exterior-envelope work does. Cosmetic finish work (paint, flooring, cabinets, countertops) is typically exempt, while additions, decks above a set height, re-siding, window changes that alter the opening, water heaters, electrical changes, and detached structures over a size threshold generally require permits. Thresholds differ by city. Iron Crest Remodel pulls the required permits for the work we perform and builds to current Treasure Valley code.

Who issues the permit for my project — the city or the county?

If your property is inside an incorporated city's limits (Boise, Meridian, Nampa, Caldwell, Eagle, Kuna, Star, Garden City), that city's building department issues the permit. If you're in an unincorporated area, the county (Ada or Canyon) Development Services department handles it. Each official department is linked below.

Treasure Valley Building Permit Fees & Timelines by City

Verified permit-fee structures, plan-review timelines, and direct links to every official building department across Ada and Canyon counties — for homeowners planning a remodel, addition, or ADU.

Every figure below was pulled from the jurisdiction's own official city or county website and verified live in June 2026 (sources linked per city). Where a fee table is published only as a scanned image or behind a firewall, we link the official schedule rather than reproduce numbers we couldn't read from source. Jurisdictions update their schedules periodically — always confirm current fees and requirements with the issuing department before budgeting.

How Building Permit Fees Work in the Treasure Valley

There is no flat “a kitchen permit costs $X” figure here — because no Treasure Valley jurisdiction charges that way. Almost every city and county uses a valuation-based fee: the building department assigns your project a construction valuation (often from the International Code Council's Building Valuation Data, or your stated project cost — whichever is greater), then applies a published schedule of base amounts plus a per-$1,000 increment.

A separate plan-review fee is usually added on top — commonly 20% to 50% of the permit fee depending on the city (for example, Boise adds 20% on residential plan review; Eagle 35%; Caldwell 40% building review plus a 35% planning review; Garden City 50% on projects over $20,000). Trade permits (electrical, plumbing, mechanical) and impact fees are typically charged separately again.

Worked example — City of Eagle

On a $60,000 remodel valuation, Eagle's schedule gives a building-permit fee of $643.75 (first $50,000) + $7 per additional $1,000 = $643.75 + $70 = $713.75, then adds 35% residential plan review (~$250) — before any trade permits. The same $60,000 in Boise lands near $658.80 permit + 20% plan review. Different cities, different schedules — which is exactly why each one is linked below.

Permit Fees & Timelines by Jurisdiction

Inside a city's limits, that city's building department issues your permit; in unincorporated areas it's the county. Each card links the official building page and the official fee schedule.

Boise

City

Fee basisverified from source: Valuation-based. Over $100,000 of valuation the building-permit fee is $913.09 for the first $100,000 plus $5.17 per additional $1,000. Residential plan review adds 20% of the permit fee.
Plan-review timeline: Published targets (working days): single-family Level 1 under 10 days, Level 2 under 14; additions/alterations Level 1 under 1 day, Level 2 under 10. Actual times vary by workload.

Official building dept Official fee schedule

Source: City of Boise PDS building-code fee schedule (10-1-21) + quarterly Permit Processing Timeframes report.

Meridian

City

Fee basisverified from source: Valuation-based. The city's residential fee worksheet computes the building-permit fee as a $50 base plus $5.50 per $1,000 of construction valuation (valuation built from per-sq-ft multipliers). Impact fees are separate. The worksheet is an estimating tool — the adopted schedule governs.
Plan-review timeline: Residential permits: 7–10 business days from submittal to approval (in-house review). Inspections next business day.

Official building dept Official fee schedule

Source: City of Meridian Community Development residential fee worksheet + KPI application/permit time-frames document.

Nampa

City

Fee basissee official schedule: Valuation-based — fees are “based on the value of work” per the city's Building Fee Schedule. The full fee table is published as a PDF on the city's fee-schedule page (linked); confirm the current figures there.
Plan-review timeline: Allow 1–2 weeks to process an application after payment is submitted.

Official building dept Official fee schedule

Source: City of Nampa Development Services FAQ + Permit Fee Schedules page (full fee table is a PDF on that page).

Caldwell

City

Fee basisverified from source: Valuation-based tiers (base fee + per-dollar increment by value range). Example tiers: $25,000–$49,999 = $326.54 base; $50,000–$99,999 = $549.65 base + $0.00565 per $. Residential building plan review adds 40% of the permit fee, plus a 35% planning/zoning review (minimum $55).
Plan-review timeline: Residential plan review: approximately 7–10 business days for the first review (may extend up to 5 more business days by workload).

Official building dept Official fee schedule

Source: City of Caldwell Building Safety Division FY2026 Building Permit Fee Chart + Building Safety Division page.

Eagle

City

Fee basisverified from source: Valuation-based (ICC Building Valuation Data). Example tiers: $25,000–$50,000 = $391.25 for the first $25,000 + $10.10 per additional $1,000; $50,000–$100,000 = $643.75 + $7 per $1,000; over $100,000 = $993.75 + $5.60 per $1,000. Residential plan review adds 35% of the permit fee.
Plan-review timeline: Plan-review turnaround (no revisions): single-family home, ADU, detached garage/shop, shed, addition, or pool ≈ 6 weeks; townhomes ≈ 6–8 weeks.

Official building dept Official fee schedule

Source: City of Eagle Building Department fee schedule (Res 20-19) + Building page plan-review turnaround.

Kuna

City

Fee basisverified from source: Valuation-based project-value table plus a $70 residential building-permit submittal fee. Example tiers: $25,001–$50,000 adds $7.20 per additional $1,000; $50,001–$100,000 adds $5.15 per $1,000. Residential structural plan review is $65 per hour (1-hour minimum).
Plan-review timeline: Not published — confirm current turnaround with the department.

Official building dept Official fee schedule

Source: City of Kuna Building Department fee-schedule PDF (project-value table).

Star

City

Fee basissee official schedule: A non-refundable residential application submittal fee of $100 applies (credited toward the permit). The building-permit fee rate table is published as an image on the city's fee page (linked) — confirm the current rates there.
Plan-review timeline: Small residential projects: 2–4 weeks. Larger residential projects: approximately 4–6 weeks. Each required revision can add ~3–4 weeks.

Official building dept Official fee schedule

Source: City of Star Building Department fee information page + permit FAQ.

Garden City

City

Fee basisverified from source: Valuation-based (ICC Building Valuation Data or actual project cost, whichever is greater). Example base tiers: $2,000–$25,000 = $150 + $17.08 per additional $1,000; $25,000–$100,000 = $542.84 + $12.32 per $1,000. Residential plan review is 50% of the permit fee for projects over $20,000 (or $155/hour under $20,000).
Plan-review timeline: Building permits require 10–15 working days to review (commercial with structural review at least 21 days). Re-submittals restart the review clock.

Official building dept Official fee schedule

Source: Garden City Development Services fee schedule (Res 1239-26) + Building Services page.

Ada County

County (unincorporated)

Fee basissee official schedule: Valuation-based per the county's Building Permit Valuation Guidelines (published as a PDF on the fees page, linked). The detailed valuation tables aren't machine-readable on the county site — confirm the current figures directly with Development Services.
Plan-review timeline: Ada County does not publish a fixed SLA; its processing notice has indicated roughly 4 weeks for building permits — confirm current turnaround with Development Services.

Official building dept Official fee schedule

Source: Ada County Development Services building & fees pages (valuation guidelines + processing-times notice).

Canyon County

County (unincorporated)

Fee basissee official schedule: The county states building permit fees “average 2% of total market value,” with residential valuation set from a price-per-square-foot value table. The detailed value table is a scanned image — confirm exact figures with the Building Department.
Plan-review timeline: Not published — confirm current turnaround with the department.

Official building dept Official fee schedule

Source: Canyon County Development Services Building Department page + 2025 permit fee schedule.

What Typically Requires a Permit

Usually requires a permit

New construction, additions, and ADUs
Structural alterations and remodels that move or remove walls
Decks above ~30 inches, and most attached structures
Re-siding, and window/door changes that alter the opening
Electrical, plumbing, mechanical (HVAC), water heaters, fireplaces
Detached structures over a size threshold (commonly 200 sq ft)
Retaining walls over 4 ft, and manufactured-home placement

Often exempt (confirm locally)

Painting, wallpaper, tiling, carpet/flooring
Cabinets and countertops (no plumbing/electrical changes)
Small detached structures under the local size threshold
Low decks not attached to the home, under the height/area limit
Sidewalks and driveways (zoning rules may still apply)

Exemption thresholds differ by jurisdiction — this is a general guide, not a substitute for your city or county's code. When Iron Crest Remodel runs your project, we determine which permits are required and pull them as part of the job.

Permits Handled, Code Met — Start with a Free Estimate

Iron Crest Remodel pulls the permits and builds to current Treasure Valley code on every project. Licensed Idaho contractor (RCE-6681702), insured, free estimates.

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