Civic Data Works · Plans catalog · City of Colusa

City of Colusa — preapproved ADU plans

City of Colusa ( County) posts 4 preapproved accessory dwelling unit plans on its own website, verified 2026-08-07.

Agency: City of Colusa
County
Plans posted: 4
Verified: 2026-08-07

What’s posted

City's ADU & JADU page (funded by an HCD LEAP grant) posts 4 pre-approved ADU floorplans (490sf 1bd/1ba, 757sf 2bd/1ba, 810sf 3bd/1ba, 1000sf 2bd/2ba) as free direct-download PDFs, plus an offer to email the planner for full builder sets.

Sources: https://cityofcolusa.com/?page_id=12189, https://cityofcolusa.com/wp-content/uploads/2020/07/ADU-Reapproved-plan-single-sheets-2.pdf

First fetch of the ADU & JADU page confirmed 4 direct PDF links described as 'free to residents'. Second independent fetch of one PDF (plan 1, 490sf) returned a real 1.2MB PDF with matching Canva-authored title/metadata ('ADU Reapproved plan single sheets', 'Plan 1 - 490 Square Feet, 1 Bedroom/1 Bath', style options Bungalow/California Ranch/Craftsman) — the fetch tool's text-extraction couldn't OCR the image-based drawing sheets, but file identity/metadata match confirms it is the real plan document, not a dead link or placeholder. Page does not explicitly cite 'AB 1332' by name but matches the (a)(4) posting duty. Homepage nav review also confirms no separate blocking issue.

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 Colusa’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 [email protected]

Data from Civic Data Works’ AB 1332 compliance scan. If City of Colusa’s plans have moved or you find an error, write to [email protected] and we will correct this page. Back to the full catalog.