ADU Regulations in La Habra, California (2026)

Regulations at a glance

Local rules & notes

Innovative Primary-to-ADU Conversion: The ordinance allows a primary dwelling smaller than 1,200 square feet to be designated as an ADU to a new construction single-family home on the same lot. Excessive Corner Lot Setbacks: The City attempted to require 10-foot street-side setbacks on corner lots, but HCD clarified that state law limits this to 4 feet. Building Separation Restriction: The City required 10 feet of separation between buildings, which HCD ruled cannot prohibit an 800 sqft ADU with 4ft setbacks. Utility Supply Prohibition: The ordinance prohibits new ADUs if the City Engineer determines insufficient water/sewer, but HCD notes this cannot apply to statewide exemption ADUs (subdivision e).

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

Frequently asked questions about ADU regulations in La Habra

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

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

• What are the setback requirements for ADUs in La Habra?

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

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

  In La Habra, 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 Habra or county planning for your zone.

• Is ADU approval ministerial in La Habra?

  In La Habra, 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 Habra planning can confirm the exact process.

• Are there parking requirements for ADUs in La Habra?

  In La Habra, 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 Habra planning for your address.