Civic Data Works · Plans catalog · City of Lathrop
City of Lathrop — preapproved ADU plans
City of Lathrop ( County) posts 6 preapproved accessory dwelling unit plans on its own website, verified 2026-08-07.
- Agency
- City of Lathrop
- County
- Plans posted
- 6
- Verified
- 2026-08-07
What’s posted
City's Pre-Approved ADU page posts 6 free, downloadable, standardized construction plan PDFs from a local HCD-grant-funded design program: Blueberry (496sf studio, gable/hip roof options), Cypress (599sf 1-bed, gable/hip), and Keith (748sf 2-bed, gable/hip).
Sources: https://www.ci.lathrop.ca.us/planning/page/pre-approved-accessory-dwelling-unit-adu, https://www.ci.lathrop.ca.us/sites/default/files/fileattachments/planning_division/page/26289/blueberry-final_plans_-_gable_v1.pdf
First fetch of the ADU program page confirmed 'FREE, standardized ADU construction plans that are pre-approved' with 6 direct PDF links. Second independent fetch of one of the actual PDFs (Blueberry studio, gable roof) confirmed it is a real 3.8MB architectural drawing set with floor plan, room labels, window/door schedules, and construction notes — not a placeholder. Clear 'posted'.
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 Lathrop’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 Lathrop’s plans have moved or you find an error, write to [email protected] and we will correct this page. Back to the full catalog.