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Permit guides
ADU Permits in Ceres: a Homeowner's Guide
Ceres keeps it simple: five named ADU designs under a streamlined process, plus the county's plan library — just mind the counter hours before you visit.
Last updated October 2026. Rules change; always confirm current requirements with the city before you build.
Who handles your permit
The City of Ceres Planning & Building Division runs ADU permits from 2220 Magnolia Street, Ceres — (209) 538-5700. Counter hours matter here: the Building Division is open primarily Tuesdays through Fridays, 8:00 AM to 5:00 PM, with limited service on Mondays. The building technician ((209) 538-5753, Tuesday–Friday) is the first call for ADU questions.
What you can build
5 named plansStreamlined options: 260 Studio, 562 Serenity, 744 Comodo, 798 Trek, 896 Double
Tue–FriCounter service 8–5, primarily Tuesday–Friday; limited Mondays
+County setMore free plans via Stanislaus County's ADU library
1,200 sq ftDetached ADU max under state law
60 daysState-required decision on a complete application
500 sq ftJunior ADU max, carved from existing space
Ceres's streamlined ADU process
Ceres offers a streamlined process for ADUs with five distinct plan sets available when you submit a building permit application: the 260 Studio (260 sf), 562 Serenity (562 sf, 1-bedroom), 744 Comodo (744 sf, 1-bedroom), 798 Trek (798 sf, 1-bedroom above a garage), and 896 Double (896 sf, 2-bedroom).
Beyond those five, Ceres points homeowners to additional free plans from the Stanislaus County ADU library — the same pre-drawn set developed for Ceres, Modesto, Oakdale, Riverbank, Turlock, and Waterford. Either way, you supply the site plan showing where the unit sits on your lot.
What goes into the submittal
- Building permit application — Ceres's residential application, with proof of ownership or contractor on the city's contractor information system.
- Three sets of scaled plans (1/4" = 1'-0"): foundation, floor plan, all exterior elevations, electrical, mechanical, and sectional drawings in two directions.
- Energy calculations and truss engineering (two sets each), with engineer's wet signature on trusses.
- Three sets of plot plans showing setbacks, easements, and existing structures.
- Application fees at submittal — the applicant agrees to pay plan check fees whether or not a permit ultimately issues.
Where applications usually get stuck
- Monday visits. The counter runs limited service on Mondays — schedule plan pickups and questions for Tuesday through Friday.
- Plan-set completeness. Ceres's checklist is specific about copies and wet signatures; an incomplete package isn't processed.
- Agricultural buffers. Ceres's southern and eastern edges meet working farmland — ag compatibility and buffer questions come up on fringe lots.
- Utility coordination. Water, sewer, and electric capacity are verified during review — older services may need upsizing.
- Flood awareness. Low-lying areas near the Tuolumne River corridor can trigger extra floodplain review.
Not sure where to start? That's the part we do. We look at your property, map the requirements, coordinate the plans and specialists, and manage the submittal and corrections — one point of contact.