ADU Regulations in Sierra Madre, California (2026)

Regulations at a glance

Local rules & notes

Foothill Catalog Foundation: A community-based nonprofit organization providing pre-approved home and ADU designs to retain local architectural character and reduce costs for displaced residents. Like-for-Like Rebuild Expansion: Properties destroyed by fire can rebuild with a 10% or 200 sq. ft. increase in floor area without triggering current zoning or setback updates. ADU Prioritization: In fire-impacted areas, homeowners are permitted to construct an ADU on the property before the primary dwelling is rebuilt.

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

Frequently asked questions about ADU regulations in Sierra Madre

• What is the maximum ADU size in Sierra Madre, California?

  In Sierra Madre, 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; Sierra Madre may follow state defaults or have local limits. Verify with Sierra Madre planning for your specific lot.

• What are the setback requirements for ADUs in Sierra Madre?

  In Sierra Madre, 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 Sierra Madre planning for overlay zones or design standards that could affect your site.

• What is the maximum height for an ADU in Sierra Madre?

  In Sierra Madre, 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 Sierra Madre or county planning for your zone.

• Is ADU approval ministerial in Sierra Madre?

  In Sierra Madre, 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; Sierra Madre planning can confirm the exact process.

• Are there parking requirements for ADUs in Sierra Madre?

  In Sierra Madre, 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 Sierra Madre planning for your address.