Compare · Updated Oct 18, 2026
ADU fees side by side, at four sizes
Modeled totals for a detached ADU next to a 2,000 sq ft main home (example assumption), law in force today. Tap a column to sort.
- 01Mountain ViewSanta Clara County$7,240–$47,067
- 02HaywardAlameda County$7,563–$17,821
- 03WatsonvilleSanta Cruz County$9,757–$16,913
- 04Santa Cruz CountySanta Cruz County$6,167–$16,316
- 05San JoséSanta Clara County$8,785–$15,397
- 06Santa CruzSanta Cruz County$7,463–$13,748
- 07MilpitasSanta Clara County$5,964–$12,464
- 08Palo AltoSanta Clara County$2,000–$12,035
- 09San MateoSan Mateo County$7,234–$11,269+
- 10Redwood CitySan Mateo County$9,199
- 11Morgan HillSanta Clara County$0–$8,384
- 12FremontAlameda County$1,153–$7,188+
- 13CampbellSanta Clara County$496–$5,143+
- 14BerkeleyAlameda County$1,062–$5,098+
- 15CapitolaSanta Cruz County$545–$4,983+
- 16SunnyvaleSanta Clara County$432–$4,468+
- 17Los GatosSanta Clara County$68–$4,403+
- 18Scotts ValleySanta Cruz County$0–$4,395+
- 19GilroySanta Clara County$0–$4,135+
- 20Long BeachLos Angeles County$0–$4,035
- 21San FranciscoSan Francisco County$0–$4,035+
- 22OaklandAlameda County$3,878+
| Berkeley+Alameda County | $1,062 | $1,062–$5,098 | $1,062–$6,442 | $1,062–$7,518 | $0 | 117 |
|---|---|---|---|---|---|---|
| Campbell+Santa Clara County | $496–$982 | $496–$5,143 | $9,824–$15,941 | $9,824–$17,117 | $9,328 | 340 |
| Capitola+Santa Cruz County | $545–$948 | $545–$4,983 | $545–$6,328 | $545–$7,404 | $0 | 18 |
| Fremont+Alameda County | $1,153–$3,153 | $1,153–$7,188 | $1,153–$8,533 | $1,153–$9,609 | $0 | 188 |
| Gilroy+Santa Clara County | $0–$100 | $0–$4,135 | $9,959–$15,439 | $11,951–$18,507 | $9,959 | 29 |
| HaywardAlameda County | $5,913–$12,136 | $7,563–$17,821 | $12,592–$24,195 | $13,670–$26,349 | $3,379 | 56 |
| Long BeachLos Angeles County | $0 | $0–$4,035 | $2,366–$7,746 | $2,366–$8,822 | $2,366 | 644 |
| Los Gatos+Santa Clara County | $68–$268 | $68–$4,403 | $2,068–$7,848 | $2,468–$9,404 | $2,000 | 128 |
| MilpitasSanta Clara County | $4,757–$6,632 | $5,964–$12,464 | $6,769–$15,201 | $7,640–$17,618 | $0 | 49 |
| Morgan HillSanta Clara County | $0–$2,893 | $0–$8,384 | $21,128–$32,306 | $25,353–$38,767 | $21,128 | 31 |
| Mountain ViewSanta Clara County | $7,240–$43,032 | $7,240–$47,067 | $8,997–$51,548 | $9,348–$53,252 | $3,137 | 86 |
| Oakland+Alameda County | $0 | $3,878 | $5,170 | $6,204 | $0 | 192 |
| Palo AltoSanta Clara County | $2,000–$8,000 | $2,000–$12,035 | $24,613–$35,993 | $29,136–$41,592 | $22,613 | 136 |
| Redwood CitySan Mateo County | $4,661 | $9,199 | $5,170 | $6,204 | $0 | 63 |
| San Francisco+San Francisco County | $0 | $0–$4,035 | $0–$5,380 | $0–$6,456 | $0 | 171 |
| San JoséSanta Clara County | $7,030–$9,608 | $8,785–$15,397 | $14,045–$29,202 | $15,443–$31,676 | $8,900 | 502 |
| San Mateo+San Mateo County | $5,761 | $7,234–$11,269 | $8,702–$20,090 | $9,876–$23,542 | $6,008 | 151 |
| Santa CruzSanta Cruz County | $6,095–$7,592 | $7,463–$13,748 | $12,785–$21,165 | $14,590–$24,646 | $3,958 | 79 |
| Santa Cruz CountySanta Cruz County | $4,277–$8,667 | $6,167–$16,316 | $19,702–$31,872 | $22,034–$36,638 | $12,794 | 43 |
| Scotts Valley+Santa Cruz County | $0–$360 | $0–$4,395 | $17,183–$23,110 | $19,160–$26,200 | $17,370 | 9 |
| Sunnyvale+Santa Clara County | $432 | $432–$4,468 | $2,353–$8,701 | $2,759–$10,377 | $2,548 | 107 |
| WatsonvilleSanta Cruz County | $4,210–$11,065 | $9,757–$16,913 | $26,391–$33,847 | $30,279–$37,976 | $13,671 | 24 |
+ Totals leave out valuation-based building fees or fees we couldn’t model; see each place’s page. Ranges: low counts fees that always apply, high adds fees that may apply. Permits: HCD Annual Progress Report data.