ADUs & Additions in La Mirada

City of La Mirada Building & Safety (services contracted to the County of Los Angeles). La Mirada contracts with the County of Los Angeles for Building & Safety, so completed applications go to the permit counter at City Hall, 13700 La Mirada Boulevard, while building and structural plan checks are performed at the County's South Whittier District office in Norwalk or its Central office in Alhambra. Permanent pools and their equipment are filed on the city's Combination Pool Permit application. The General Plan requires geotechnical engineering studies for development proposals on properties it maps as subject to liquefaction and landslides. We prepare the drawings, make the submittal and handle plan-check corrections ourselves, so you are not the one chasing plan check.

Low-density single-family neighborhoods cover just over half of the city's land, in R-1 districts with minimum lot sizes from 6,000 to 15,000 square feet, on ground the General Plan describes as relatively flat outside the northeast. Nearly half of La Mirada's housing units were built between 1950 and 1959, so many projects begin with a mid-century house and yard. One local condition that shapes the work: Most of the city is relatively flat, but the General Plan identifies steep terrain in the northeast portion where earthquake-induced landslides are possible, so parcels there start with geotechnical review.

All of it, including Foster Park, Creek Park and Granada Heights. Our crews run every job out of our Cahuenga Pass base in Los Angeles, with our own people on site.

Detached ADU: generally $150,000 to $400,000+ across Southern California. What moves it is square footage, finish level, utility runs, and site access; garage conversions typically run well below a ground-up detached build. We give line-item pricing after seeing the site rather than quoting a number over the phone.

Plan a realistic year. Design and engineering typically take one to three months, city plan check and corrections add several more, and construction usually runs four to eight months depending on size and site access.

Usually yes, and often substantially, because the foundation, walls and roof already exist. The trade-offs are that you lose the garage, and older slabs and framing sometimes need upgrading to meet current code.

California ADU law is designed to allow long-term rental, and an ADU is one of the few ways to add rentable square footage to a single-family lot. Short-term rental rules vary by city, so confirm your local ordinance before counting on that income.

Yes. Plans, engineering, Title 24 and the city submittal are all handled in-house, including responding to plan-check corrections. That is a service we sell on its own, so it is not something we hand off.