ADU Regulations in Madera County, California (2026)

Regulations at a glance

Local rules & notes

ADU Pre-Approval Program: The county encourages the use of pre-approved ADU construction plans to streamline the submittal and approval process, allowing homeowners to receive building permits faster. Multi-Family Non-Livable Space Conversion: Owners of multi-family dwellings can convert non-habitable areas like storage rooms, carports, and attics into ADUs. 25% Multi-Family Unit Bonus: For multi-family conversions, the number of ADUs created can be up to 25 percent of the existing unit count.

For the official ordinance and latest updates, check your city or county planning department.

Frequently asked questions about ADU regulations in Madera County

• What is the maximum ADU size in Madera County, California?

  In Madera County, the maximum ADU size is typically 1000 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; Madera County may follow state defaults or have local limits. Verify with Madera County planning for your specific lot.

• What are the setback requirements for ADUs in Madera County?

  In Madera County, 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 Madera County planning for overlay zones or design standards that could affect your site.

• What is the maximum height for an ADU in Madera County?

  In Madera County, 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 Madera County or county planning for your zone.

• Is ADU approval ministerial in Madera County?

  In Madera County, 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; Madera County planning can confirm the exact process.

• Are there parking requirements for ADUs in Madera County?

  In Madera County, parking for ADUs is generally false. California law often waives parking for ADUs within a half-mile of transit or in certain historic districts. Check with Madera County planning for your address.