ADU Regulations in La Caada Flintridge, California (2026)

Regulations at a glance

Local rules & notes

Non-Conforming Structure Conversion: The code explicitly protects the right to convert accessory structures with non-conforming setbacks or height into ADUs, overriding the general prohibition on expanding non-conforming structures. Tree Replacement In-Lieu Fee: If a protected tree must be removed for development and on-site replacement is not feasible due to site constraints, the owner may pay into the City's Tree Replacement Fund instead of planting trees. Bicycle Parking Exemption: While most residential uses require bicycle parking, ADUs are explicitly listed as 'N/A', removing a potential site planning requirement. Historic Preservation Incentives (Mills Act): Designated historic resources are eligible for Mills Act contracts for property tax relief, which can improve the financial viability of preserving a main home while adding an ADU.

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

Frequently asked questions about ADU regulations in La Caada Flintridge

• What is the maximum ADU size in La Caada Flintridge, California?

  In La Caada Flintridge, 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; La Caada Flintridge may follow state defaults or have local limits. Verify with La Caada Flintridge planning for your specific lot.

• What are the setback requirements for ADUs in La Caada Flintridge?

  In La Caada Flintridge, 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 La Caada Flintridge planning for overlay zones or design standards that could affect your site.

• What is the maximum height for an ADU in La Caada Flintridge?

  In La Caada Flintridge, 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 La Caada Flintridge or county planning for your zone.

• Is ADU approval ministerial in La Caada Flintridge?

  In La Caada Flintridge, 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; La Caada Flintridge planning can confirm the exact process.

• Are there parking requirements for ADUs in La Caada Flintridge?

  In La Caada Flintridge, 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 La Caada Flintridge planning for your address.