ADU Rules in Stanislaus County, California

We track 1 city in Stanislaus County. Each city writes its own ADU ordinance on top of California law, so size limits, fees, and design rules differ from one city to the next.

Cities

Max Detached Size

1,000 sq ft

Build Costs From

$90,000

Pre-approved Plans

1 of 1 cities

Stanislaus County Cities Compared

City	Max detached	Height	Permit fees	Build cost
Modesto	1,000 sq ft	16 ft	$3,500 – $8,500	$90,000 – $195,000

Modesto ADU rules

Modesto homeowners can use free detached ADU plans developed by Stanislaus County with Modesto and other county cities, in seven designs with several exterior finishes. The city's ADU Express program offers same-day approvals for complete plan sets prepared by a professional designer, architect or engineer. Modesto has also funded an ADU loan program through Measure H.

Rules that apply in every California city are summarized in our California ADU law guide. See all California cities or compare every city side by side.