Civic Data Works · Plans catalog · City of Hawthorne
City of Hawthorne — preapproved ADU plans
City of Hawthorne ( County) posts 3 preapproved accessory dwelling unit plans on its own website, verified 2026-08-06.
- Agency
- City of Hawthorne
- County
- Plans posted
- 3
- Verified
- 2026-08-06
What’s posted
The city has a dedicated Pre-Approved ADU Plans Program page (explicitly citing AB 1332) posting three pre-approved detached one-story plans - 1 bedroom/1 bath, 3 bedroom/1 bath, and 3 bedroom/2 bath - each with the plan document, structural calculations, and energy analysis report available for download, plus a Pre-Approved ADU Permit Guide, Checklist, and FAQ.
Gap from a fully compliant program: No third-party designer submission path or applicant contact listing was visible on the page; all three plan sets appear to be city-provided.
Source: https://www.cityofhawthorne.org/departments/planning/pre-approved-adu-plans
cityofhawthorne.org returned HTTP 403 to direct fetches; page read in full via reader proxy of the live URL (r.jina.ai), which rendered the complete program page: three named plan sets each with plan document + structural calculations + energy analysis report download links, plus permit guide/checklist/FAQ documents and Citizen Self Service submission instructions. Adversarially re-verified 2026-08-06 by an independent re-fetch agent: Fetched cityofhawthorne.org/departments/planning/pre-approved-adu-plans via proxy (direct fetch 403s). Confirms 3 detached single-story plans -- Plan 1 (1bd/1ba), Plan 2 (3bd/1ba), Plan 3 (3bd/2ba) -- each with downloadable full construction plans, structural calculations, and building energy analysis reports directly on the page.
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 Hawthorne’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 Hawthorne’s plans have moved or you find an error, write to [email protected] and we will correct this page. Back to the full catalog.