Civic Data Works · Plans catalog · County of Plumas
County of Plumas — preapproved ADU plans
County of Plumas ( County) posts 4 preapproved accessory dwelling unit plans on its own website, verified 2026-08-07.
- Agency
- County of Plumas
- County
- Plans posted
- 4
- Verified
- 2026-08-07
What’s posted
The county's ADU page hosts 4 free preapproved plan types (Type A-D, 705-1,200 sf) plus an Idea Book, each with its own downloadable PDF construction document set (architectural, structural, elevations), stated as provided by the County at no cost and already pre-plan-checked.
Sources: https://www.plumascounty.us/3285/Accessory-Dwelling-Units-ADU-Pre-Approve, https://www.plumascounty.us/DocumentCenter/View/48579
Second independent WebFetch of the Type A plan document (DocumentCenter/View/48579) confirmed a real oversized file (exceeded the 10MB fetch limit), consistent with an actual multi-sheet construction plan set rather than a placeholder.
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 County of Plumas’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 County of Plumas’s plans have moved or you find an error, write to [email protected] and we will correct this page. Back to the full catalog.