State law permits ADUs up to 1,200 sqft for detached units. 5,500–7,500 sqft typical in established La Habra neighborhoods. No minimum lot size required by state law.
16 feet for single-story detached ADUs. Up to 18 feet with roof pitch allowance. Two-story ADUs may reach 25 feet in qualifying zones under AB 1332.
4-foot minimum from rear and side property lines for new detached ADUs. No setback required for conversions of existing legal structures.
No additional parking required if within 0.5 miles of public transit. OCTA bus routes along La Habra Boulevard and Whittier Boulevard qualify many properties for parking exemptions.
No owner-occupancy requirement (permanent per AB 976, effective 2025).
Estimated cost $200K–$350K. Permit fees $3.5K–$9K. Impact fees: Waived under 750 sqft.
La Habra is a diverse city of approximately 63,000 residents in the northernmost corner of Orange County, bordering La Habra Heights and the Los Angeles County line. The city offers one of the most affordable entry points to Orange County homeownership, with median home prices significantly below the county average. This affordability extends to construction costs, making ADU development particularly attractive from a return-on-investment standpoint. La Habra's residential neighborhoods feature a mix of post-war ranch homes from the 1950s–60s and newer developments, with lot sizes typically ranging from 5,500–7,500 sqft. The city is served by the Lowell Joint School District and La Habra City School District, with Sonora High School and La Habra High School drawing families to the area. La Habra Boulevard and Whittier Boulevard form the commercial spine, while the 57 and 90 freeways provide direct commute access to Fullerton, Anaheim, Brea, and downtown LA. The Westridge Golf Club and La Habra Community Center anchor the city's recreational offerings.