Published: 12 Oct 2026 · Last verified: 10 Oct 2026 · Next review: Jan 2027 Cost figures are re-checked against permit records quarterly. Changes are logged in Corrections.
Santa Barbara’s building permit for an 800 sq ft ADU costs $22,566. Fullerton charges $1,223 for the same piece of paper. That is not a typo — it is roughly an 18x multiple, the highest permit bill this series has published, and it single-handedly makes Santa Barbara the most expensive fee environment we have priced.
The city’s fee schedule (Resolution No. 2026-059, FY 2027) prices new R-3 dwellings by square footage with unusual transparency: a $23,704 base for 1,000 sq ft ($17,383 permit + $6,321 plan check), scaled proportionally — 800/1,000 × $23,704 = $18,963 ($13,906 permit + $5,057 plan check). Then come the mandatory add-ons: an 8% technology fee ($1,517) and an 11% growth-management / general plan update fee ($2,086), both levied on projects creating new square footage. Total: $22,566. This is the schedule’s own methodology, not our estimate.
The counterweight is equally stark: Santa Barbara levies no development impact fees at all. The full fee schedule contains zero DIF line items. The 750 sq ft cliff — the defining feature of most coastal California ADU fee structures — is moot here. And when the ADU shares the lot’s existing water meter (the standard case under state law), sewer and water capacity charges are $0. The city’s fee philosophy is concentrated, not diffuse: one enormous permit bill, nothing else.
The Preapproved ADU Program (May 2025, implementing AB 1332) is the city’s answer to its own permit pricing. Ready-to-use designs get a 25% plan-check discount — a flat $2,369 for 501–800 sq ft versus the standard $5,057 — plus review in half the standard time and staff review within 10 business days. On an $18,963 standard permit path, the program saves roughly $2,700 in plan check alone.
The short answer
| 800 sq ft detached ADU · Santa Barbara · 2026 | Amount |
|---|---|
| Total build cost (see assumptions) | ~$327,000 |
| Cost per square foot | ~$409 |
| Largest single line | Systems + interior, $147,000 |
| Building permit + plan check + add-ons | ~$22,566 (series high) |
| DIF — city impact fees | $0 (no program) |
| School district fee (SBUSD) | $4,136 |
| Sewer / water capacity | $0 (shared meter) |
| Preapproved ADU program | 25% plan-check discount |
| 750 sq ft cliff | Moot — no DIF to waive |
The full line-item breakdown
Six phases. The same six used on every build in this series.
| Phase | Cost | Share |
|---|---|---|
| Soft costs (design, permits, fees) | ~$39,000 | 12% |
| Site work + foundation | $38,000 | 12% |
| Framing + structure | $48,000 | 15% |
| Building envelope | $42,000 | 13% |
| Systems + interior | $147,000 | 45% |
| Landscaping & hardscape | $13,000 | 4% |
| Total | ~$327,000 | ~$409 / sq ft |
The fee autopsy
Every fee line we found, with exactly what it is and where it came from.
| Fee line | Amount | Source / status |
|---|---|---|
| Design & engineering | $12,000 | Series baseline reduced — Preapproved ADU Program cuts design time; site-specific work still costs money |
| Building permit | $13,906 | 0.8 × $17,383 — Res. 2026-059, R-3 New Dwellings |
| Plan check | $5,057 | 0.8 × $6,321 — same schedule (preapproved: $2,369 flat) |
| Technology fee | $1,517 | 8% of total permit fee — same schedule |
| Growth management fee | $2,086 | 11% of permit fee — same schedule |
| School fee (SBUSD) | $4,136 | $5.17/sq ft × 800 — SBUSD Res. 2025-26-02 ($5.38 SAB max not yet adopted) |
| City DIF | $0 | No DIF program found — full schedule search, zero matches |
| Sewer / water capacity | $0 | Shared existing meter — SBMC 14.08; fixture-unit formula only if separately metered |
Against the series baseline
| Santa Barbara | LA County baseline | |
|---|---|---|
| Total | ~$327,000 | $320,000 |
| Per sq ft | ~$409 | $400 |
| Building permit + plan check | ~$22,566 (series high) | carried |
| DIF | $0 | carried |
| School fee | $4,136 ($5.17) | $4,304 |
| Sewer capacity charge | $0 (shared meter) | carried |
| Preapproved ADU program | 25% plan-check discount | none |
| ADU permits 2022–2024 (HCD) | 347, 48th statewide | — |
The $7,000 premium over the baseline is the permit bill minus the missing DIF: $22,566 in permits against $0 in impact fees. No other city in the series concentrates its fee load this extremely. Use the preapproved program and the honest total drops toward $324,000 — still the priciest fee stack we have published, but with review in half the time.
A note on SB 1117
Signed September 2026, effective January 2027: for a homeowner’s first two ADUs, impact fees may apply only to square footage above 750, calculated marginally. Santa Barbara has no impact fees, so SB 1117 changes nothing on the DIF line — there is nothing to prorate. The permit fee, which is the actual story here, is outside SB 1117’s scope entirely. School fees are outside SB 1117’s impact-fee definition and stay at $4,136.
Sources
- City of Santa Barbara Fee Schedule FY 2027 (Res. 2026-059): https://santabarbaraca.gov/sites/default/files/2026-07/Resolution%202026-059.pdf
- SBUSD Developer Fees: http://sbunified.community.diligentoneplatform.com/document/49b43ad4-2259-4ca8-a552-f7e961aa109f
- Preapproved ADU Program: https://santabarbaraca.gov/news/new-preapproved-adu-program
See also: Compare ADU costs across cities · How to read an ADU bid · ADU soft costs
Disclaimer
Model estimate, not a quote. Fees change; the preapproved plan-check discount assumes program eligibility, and separately metered ADUs face fixture-unit capacity charges ($376.97/water FU, $137.77/sewer FU). Always verify current fees with the City of Santa Barbara Community Development Department before budgeting.