ADU Permits: Berkeley vs Hayward
How do adu permits rules compare between Berkeley, CA and Hayward, CA?
Berkeley and Hayward have similar restriction levels.
Berkeley, CA
Alameda County
Berkeley processes ADU permits ministerially under Berkeley Municipal Code Section 23.304 (Accessory Dwelling Units) and California Government Code 65852.2. Applications go through the Permit Service Center; the city must act within 60 days of a complete application. Berkeley imposes design review only when state law allows.
View full Berkeley rules →Hayward, CA
Alameda County
Hayward processes Accessory Dwelling Unit and Junior ADU permits ministerially under Hayward Municipal Code section 10-1.2740 (Chapter 10 Zoning, Article 1) and California Government Code 65852.2 and 65852.22. Applications are filed with the Hayward Planning Division / Development Services Center. State law requires the City to act on a complete application within 60 days.
View full Hayward rules →Key Facts Comparison
| Fact | Berkeley | Hayward |
|---|---|---|
| Code Section | BMC 23.304 | HMC 10-1.2740 |
| Review Type | Ministerial (no hearing) | Ministerial (no hearing) |
| Decision Window | 60 days from complete app | 60 days from complete app |
| Submittal Portal | Berkeley Permit Service Center | - |
| Allowed Districts | R-1 through R-4 + multifamily | - |
| Allowed Units | - | 1 ADU + 1 JADU per SFR lot |
| Max Detached ADU | - | 1,200 sq ft, 16 ft tall (default) |
Highlighted rows indicate differences between cities.
Berkeley FAQ
How long does an ADU permit take in Berkeley?
California Government Code 65852.2(b)(1) and BMC 23.304 require the city to act on a complete ADU application within 60 days. Berkeley's actual processing time often exceeds the state minimum due to corrections; budget 3-6 months from submittal to final permit.
Does Berkeley hold a public hearing on ADU permits?
No. BMC 23.304 follows California Government Code 65852.2 and makes ADU and JADU review strictly ministerial - the planner applies objective standards without discretionary review, public hearings, or neighbor notification.
Where do I file a Berkeley ADU application?
Through the Berkeley Permit Service Center online portal. Required submittals include the building permit application, site plan, floor plans, elevations, Title 24 energy forms, structural calculations, and (if applicable) historic resource review under BMC 23.328.
Hayward FAQ
How long does an ADU permit take in Hayward?
California Government Code 65852.2(b)(1) and HMC 10-1.2740 require Hayward to act on a complete ADU application within 60 days. Practical timelines depend on plan-check corrections - expect 3-6 months from submittal to permit issuance through the Hayward Development Services Center.
Does Hayward hold a public hearing on ADU applications?
No. HMC 10-1.2740 implements California Government Code 65852.2 and makes ADU/JADU permits ministerial. Hayward applies objective standards only - no Planning Commission hearing, no neighborhood notice, and no discretionary design review.
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