ADU Regulations in La Habra Heights, California (2026)

Regulations at a glance

Local rules & notes

Primary-to-ADU Redesignation Policy: The City allows an existing primary dwelling smaller than 1,200 sqft to be designated as an ADU to facilitate the construction of a new single-family home on the same lot. Building Separation Requirement Challenge: The City's requirement for 10ft separation between buildings is contested by HCD; it cannot be enforced if it precludes an 800 sqft ADU with 4ft setbacks. Utility Supply Prohibition Overrule: The City attempted to prohibit ADUs if water/sewer service was insufficient. HCD ruled this cannot apply to subdivision (e) (statewide exemption) ADUs.

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

Frequently asked questions about ADU regulations in La Habra Heights

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

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

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

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

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

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

• Is ADU approval ministerial in La Habra Heights?

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

• Are there parking requirements for ADUs in La Habra Heights?

  In La Habra Heights, 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 Heights planning for your address.