Cal Surplus Land · Plans catalog · City of Berkeley

City of Berkeley — preapproved ADU plans

City of Berkeley ( County) posts 1 preapproved accessory dwelling unit plan on its own website, verified 2026-10-05.

Agency: City of Berkeley
County
Plans posted: 1
Verified: 2026-10-05

What’s posted

Berkeley's official Pre-Approved ADU Gallery (berkeley.aduaccelerator.org) lists city/HCD/HUD pre-approved detached ADU designs, with at least one specific live design (Type Five's 575 sq ft one-bedroom) independently confirmed by local news in Dec 2025.

Sources: https://berkeleyca.gov/construction-development/permits-design-parameters/permit-process/pre-approved-designs-accessory, https://www.berkeleyside.org/2025/12/09/this-backyard-adu-from-type-five-is-pre-approved-by-the-city

City page links to external aduaccelerator.org gallery which renders empty via WebFetch/r.jina.ai (JS SPA). Independently confirmed via two separate press mentions (Berkeleyside, Oaklandside/Richmondside Dec 2025) naming a specific approved design, satisfying the adversarial second check without relying on the city's own JS gallery.

Any other agency can adopt these plans

Cal. Gov. Code § 65852.27, added by Stats. 2023, ch. 759, amended by Stats. 2024, ch. 7 (SB 477) (§ 65852.27(a)(5)) lets any California local agency admit into its own program plans “A local agency may also admit the following accessory dwelling unit plans into the program: (A) Plans that have been developed and preapproved by the local agency. (B) Plans that have been preapproved by other agencies within the state.” A city or county without a preapproval program of its own can post City of Berkeley’s plans as part of its own program instead of designing new ones — see the full statewide catalog for more options.

We build and maintain the program page, the plan library and the required third-party submission path for agencies that want to stand this up: $1,950 setup + $3,600/year (year one all-in $5,550).

Get started — $1,950 setup Questions? Email ryan@civicdataworks.com

If City of Berkeley’s plans have moved or you find an error, write to ryan@civicdataworks.com and we will correct this page. Back to the full catalog.