Civic Data Works · Plans catalog · City of Mountain House
City of Mountain House — preapproved ADU plans
City of Mountain House ( County) posts 8 preapproved accessory dwelling unit plans on its own website, verified 2026-08-06.
- Agency
- City of Mountain House
- County
- Plans posted
- 8
- Verified
- 2026-08-06
What’s posted
The city's Pre-Approved ADU Plans page lists 8 distinct named/numbered plans (COMH ADU Plan 1 through 8, ranging 350-1200 sq ft, including a garage-above unit and 1BR/2BR options), each a hyperlinked downloadable document in the city's Document Center.
Source: https://www.mountainhouseca.gov/443/Pre-Approved-ADU-Plans
Searched 'Mountain House California preapproved ADU plans' and fetched the agency's page directly, confirming all 8 plans are live downloadable documents. Mountain House incorporated as a city in 2024 (formerly a CSD in San Joaquin County) per task brief; this is its own current municipal page. Adversarially re-verified 2026-08-06 by an independent re-fetch agent: Page lists 8 named plans (COMH ADU Plan 1-8, 350-1200 sqft) with documents hosted on the city's own DocumentCenter (/DocumentCenter/View/ URLs).
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 Mountain House’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).
Data from Civic Data Works’ AB 1332 compliance scan. If City of Mountain House’s plans have moved or you find an error, write to [email protected] and we will correct this page. Back to the full catalog.