ADU Rules in Butte County, California

We track 1 city in Butte 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

1,200 sq ft

Build Costs From

$130,000

Pre-approved Plans

0 of 1 cities

Butte County Cities Compared

City	Max detached	Height	Permit fees	Build cost
Chico	1,200 sq ft	25 ft (detached, on a lot with a single-family home)	$5,000 – $10,000	$130,000 – $265,000

Chico ADU rules

Chico gives away pre-approved ADU building plans, 14 designs in its ADU Catalog including a two-story option, and grant-funded free site plan preparation. That can remove most design costs for a homeowner. Older neighborhoods near CSU Chico have large lots but mature trees, so tree protection rules can shape where a unit goes.

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.