ADU Regulations in Davis, California (2026)
Summary from local ordinance data. Verify with city planning for your specific lot.
Regulations at a glance
| Rule | Value |
|---|---|
| Max ADU Size | 1200 sq ft |
| Side Setback | 4 ft |
| Rear Setback | 4 ft |
| Max Height | 16 ft |
| Approval Type | Ministerial (by-right) per Gov Code §65852.2 |
| Parking Requirements | Often waived per state law; check local ordinance |
Local rules & notes
Ordinance Null and Void: HCD states that if the existing ordinance does not meet state law requirements, it is null and void, and the city must apply state standards directly. HOA Restrictions Invalid: Homeowners' Associations cannot influence or prohibit ADU approval; such restrictions are void. Unpermitted ADU Amnesty: Local agencies cannot deny permits for unpermitted ADUs built before Jan 1, 2020, solely due to building code violations unless there is a health/safety issue.
For the official ordinance and latest updates, check your city or county planning department.
Frequently asked questions about ADU regulations in Davis
What is the maximum ADU size in Davis, California?
In Davis, the maximum ADU size is typically 1200 square feet, depending on whether the unit is attached or detached. California state law allows up to 1,200 sq ft for detached ADUs and 800 sq ft for attached in many jurisdictions; Davis may follow state defaults or have local limits. Verify with Davis planning for your specific lot.
What are the setback requirements for ADUs in Davis?
In Davis, typical setback requirements are 4 feet from the side property line and 4 feet from the rear. These may be reduced to 4 feet under California Government Code § 65852.2 where applicable. Check with Davis planning for overlay zones or design standards that could affect your site.
What is the maximum height for an ADU in Davis?
In Davis, the maximum height for an ADU is generally 16 feet. State law often allows up to 16 feet for detached ADUs and up to 25 feet when within 4 feet of the property line in some cases. Confirm with Davis or county planning for your zone.
Is ADU approval ministerial in Davis?
In Davis, ADU approval is typically Ministerial (by-right) per Gov Code §65852.2. Ministerial (by-right) review means the city must approve qualifying applications without discretionary review, per California Gov Code § 65852.2. Your project must still meet objective standards; Davis planning can confirm the exact process.
Are there parking requirements for ADUs in Davis?
In Davis, parking for ADUs is generally Often waived per state law; check local ordinance. California law often waives parking for ADUs within a half-mile of transit or in certain historic districts. Check with Davis planning for your address.
Check if your specific address qualifies
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