Building Permit Fees in Napa, CA (2026)

What common projects cost

Kitchen or bath remodel

$25,000 value, remodel 300 sq ft

$2,039.44

$1,939.23 building permit + $3.25 strong motion instrumentation program (smip) tax, residential + $96.96 advanced planning

Room addition

$75,000 value, addition 400 sq ft

$2,231.79

$2,116.23 building permit + $9.75 strong motion instrumentation program (smip) tax, residential + $105.81 advanced planning

New single-family home

$350,000 value, new single-family 2,400 sq ft

$9,582.43

$9,082.79 building permit + $45.50 strong motion instrumentation program (smip) tax, residential + $454.14 advanced planning

How Napa calculates your permit fee

The city charges a building permit fee using a fee table based on floor area.

The fee table

Single family dwellings (CBC Group R-3), new construction

Floor area	Fee
1 sq ft – 1,000 sq ft	$3,086.00 for the first 1 sq ft + $2.91 per additional sq ft or fraction
1,001 sq ft – 2,500 sq ft	$5,991.00 for the first 1,001 sq ft + $2.21 per additional sq ft or fraction
2,501 sq ft – 4,000 sq ft	$9,313.00 for the first 2,501 sq ft + $2.30 per additional sq ft or fraction
4,001 sq ft – 6,000 sq ft	$12,757.00 for the first 4,001 sq ft + $1.32 per additional sq ft or fraction
6,001 sq ft – 8,000 sq ft	$15,389.00 for the first 6,001 sq ft + $1.00 per additional sq ft or fraction

Residential remodels and additions (R-3), new added or structurally remodeled area

Floor area	Fee
1 sq ft – 200 sq ft	$1,647.00 for the first 1 sq ft + $0.59 per additional sq ft or fraction
201 sq ft – 600 sq ft	$1,764.00 for the first 201 sq ft + $1.77 per additional sq ft or fraction
601 sq ft – 1,000 sq ft	$2,471.00 for the first 601 sq ft + $3.25 per additional sq ft or fraction
1,001 sq ft – 1,500 sq ft	$3,772.00 for the first 1,001 sq ft + $2.40 per additional sq ft or fraction
1,501 sq ft – 2,000 sq ft	$4,970.00 for the first 1,501 sq ft + $1.59 per additional sq ft or fraction

Commercial uses (CBC A, B, E, F, H, I, M), structural

Floor area	Fee
1 sq ft – 500 sq ft	$3,562.00 for the first 1 sq ft + $4.42 per additional sq ft or fraction
501 sq ft – 2,000 sq ft	$5,771.00 for the first 501 sq ft + $1.82 per additional sq ft or fraction
2,001 sq ft – 5,000 sq ft	$8,496.00 for the first 2,001 sq ft + $2.58 per additional sq ft or fraction
5,001 sq ft – 10,000 sq ft	$16,229.00 for the first 5,001 sq ft + $2.66 per additional sq ft or fraction
10,001 sq ft – 25,000 sq ft	$29,535.00 for the first 10,001 sq ft + $1.55 per additional sq ft or fraction

Commercial tenant improvement, non-structural

Floor area	Fee
1 sq ft – 500 sq ft	$2,135.00 for the first 1 sq ft + $3.26 per additional sq ft or fraction
501 sq ft – 2,000 sq ft	$3,763.00 for the first 501 sq ft + $1.42 per additional sq ft or fraction
2,001 sq ft – 5,000 sq ft	$5,892.00 for the first 2,001 sq ft + $1.26 per additional sq ft or fraction
5,001 sq ft – 10,000 sq ft	$9,660.00 for the first 5,001 sq ft + $0.92 per additional sq ft or fraction
10,001 sq ft – 25,000 sq ft	$14,272.00 for the first 10,001 sq ft + $0.40 per additional sq ft or fraction

Surcharges

Strong Motion Instrumentation Program (SMIP) tax, residential: $0.13 per $1,000 of value
Strong Motion Instrumentation Program (SMIP) tax, commercial: $0.28 per $1,000 of value
Advanced Planning Fee: 5% of the permit fee

What counts as project value

Floor area (square feet). Building permit fees for new construction, additions and major remodels (2.1.1-2.1.36) are priced by square footage: a base fee for the band plus a per-SF fee 'for each additional SF'. Valuation is used only for SMIP tax ('Per $1000 of valuation') and some commercial minor permits (1% of valuation); the schedule does not say how valuation is determined.

Worked example: a $350,000 new home

Building permit fee: $5,991.00 for the first 1,001 sq ft + $2.21 × 1,399 per sq ft over = $9,082.79
Strong Motion Instrumentation Program (SMIP) tax, residential: $350,000.00 ÷ 1,000 × $0.13 = $45.50
Advanced Planning Fee: 5% of $9,082.79 = $454.14
Total before trade permits: $9,582.43.

Fees people miss

May also apply (not in the totals above)

Construction & Demolition Admin Fee: when the project is covered by the construction and demolition debris recycling rules (NMC 15.32); $695.00 on the standard projects.

Fee	Amount
Land Development Excise Tax, residential	$125.00 per dwelling unit
Land Development Excise Tax, commercial	$0.01 per sq ft of gross floor area
Water efficient landscape review, 500-2,499 sq ft landscapeWhen: project has 500-2,499 sq ft of landscape area	$225.00 per project
Water efficient landscape review, 2,500 sq ft or moreWhen: project has 2,500 sq ft or more of landscape area	$400.00 per project
High performance building inspection and verificationWhen: when high performance building rules (NMC 15.30.100) apply	25% of building permit fees minus building plan check
Residential kitchen or bathroom remodel (no added area)	$612.00 each
Residential repeat/subsequent lot plan checkWhen: repeat plan on subsequent lot	$807.00 each
Residential permit processing (minimum fee, section 2.2 permits)	$244.00 each
Plan review for minor permits (if required)When: when plan review is required for a section 2.2 permit	$244.00 per hour
Commercial other permit processing	greater of $244 minimum or 1% of valuation
Fire plan check for minor permits (section 2.2)	25% of building permit fee
Planning plan check for minor permits (section 2.2)	10% of building permit fee

2 more fees

Work commenced without permit: up to 10 times the permit cost
Demolition permit: $367.00 per hour

How to apply

Gather your plans and your project's total value and floor area.
Submit to Community Development Department, Building Division online through eTRAKiT.
Pay the permit and plan review fees when invoiced.
Questions: 707-257-9500 · City Hall, 955 School Street, Napa, CA 94559

Source record

Effective: 2025-02-03
Verified: 2026-11-05
Issuer: Community Development Department, Building Division
Valuation: Floor area (square feet)
Confidence: high

What this page does not cover (10)

Band start: the table prints Min Sq Ft (1, 1,001, 2,501 ...), Max Sq Ft, Base Fee and 'Fee per SF (for each additional SF)' but does not say what 'additional' is counted from. Two readings: (A) SF above the printed Min Sq Ft (modelled), or (B) SF above Min Sq Ft minus 1 (i.e. above the previous band's Max). They differ by exactly one SF at the band rate (at most $4.42; 2,400 sq ft house $9,082.79 vs $9,085.00; 300 sq ft remodel $1,939.23 vs $1,941.00), under 0.1% of any standard fee, so reading A is kept rather than leaving the projects uncomputed (QA 2026-11-05; confirm with the Building Division). Printed bases do not chain under either reading (e.g. 3,086 + 2.91 x 999 = 5,993.09, or x 1,000 = 5,996, vs next base 5,991; 12,757 + 1.32 x 1,999 = 15,395.68 vs 15,389); differences under 2%; bases used as printed.
Single-family table stops at 8,000 sq ft; residential remodel/addition table stops at 2,000 sq ft; commercial tables at 25,000 sq ft. Larger projects not covered by the schedule.
Multifamily/other R (2.1.6-2.1.10), storage S (2.1.11-2.1.15), shell buildings (2.1.16-2.1.20) and ADU/JADU ($2,125 flat up to 1,200 sq ft, 2.1.36) tables not modelled as variants (the scope enum cannot separate them from single-family/commercial).
Construction & Demolition Admin Fee ($695 per application) applies under NMC 15.32; which permits are covered is not stated in the schedule. Stored as a conditional additional fee.
Advanced Planning Fee (5%) applies only when the building fee is $1,000 or more; all modelled tables exceed $1,000, so the threshold is not modelled.
Affordable and workforce housing units pay 50% of the building permit fee (not modelled).
The schedule does not list the California Building Standards Commission fee ($1 per $25,000) or a SMIP minimum; not recorded.
How valuation is determined (for SMIP) is not stated.
Section 2.2 is titled 'Other Building Permit Fees (including Mechanical, Plumbing and Electrical)' but lists no itemized trade fees; whether trade work on new construction is covered by the 2.1 fees is not stated. Trade fees not extracted.
Latest posted schedule is effective July 1, 2025 (fees effective Feb 3, 2025); no FY2026-27 schedule appears in the city's archive as of 2026-11-05.

Separate electrical, plumbing, mechanical, fire, impact, utility and school fees are usually not included unless they are listed. BuildingPermitCost is not a government permit office, and this is not legal advice.

Report an error · How we verify fees

How Napa compares

A $25,000 remodel costs $2,039.44 in Napa: about 5.4 times the national median of $380.00, and the 7th highest of 43 places we cover in California (state median $1,263.01).

A $75,000 addition costs $2,231.79 in Napa: about 2.7 times the national median of $820.58, and the 20th lowest of 45 places we cover in California (state median $2,473.00).

A $350,000 new home costs $9,582.43 in Napa: about 3.3 times the national median of $2,918.63, and the 14th highest of 47 places we cover in California (state median $6,927.50).

Same standard projects everywhere, including plan review and required surcharges. All California places · Compare side by side

Napa permit fee FAQ

How much is a building permit in Napa, CA?

A $25,000 remodel: $2,039.44. A $75,000 addition: $2,231.79. A $350,000 new single-family: $9,582.43. These include every fee the schedule applies to that project; trade permits are separate.

Is plan review included in the Napa permit fee?

Napa lists no separate plan review fee for these projects.

How does Napa determine project value?

Floor area (square feet). Building permit fees for new construction, additions and major remodels (2.1.1-2.1.36) are priced by square footage: a base fee for the band plus a per-SF fee 'for each additional SF'. Valuation is used only for SMIP tax ('Per $1000 of valuation') and some commercial minor permits (1% of valuation); the schedule does not say how valuation is determined.

When did these Napa fees take effect?

The schedule is effective Feb 3, 2025 (“Master Fee Schedule effective July 1, 2025; building permit fees 'Fee Effective February 3, 2025' (R2024-124)”). We last checked it against the official source on Nov 5, 2026.