ADUs & Additions in View Park-Windsor Hills

Los Angeles County Public Works, Building and Safety Division (Southwest District Office). View Park-Windsor Hills is unincorporated, so building permits come from Los Angeles County Public Works, Building and Safety, through its Southwest District Office, and long-range planning follows the County's Westside Area Plan, adopted in March 2025. On the western edge, around La Brea and Mansfield avenues, roughly 300 detached single-family parcels sit inside a state Alquist-Priolo Earthquake Fault Zone drawn along the Inglewood fault, part of the Newport-Inglewood-Rose Canyon fault zone. The County's hazard layers also show earthquake-induced landslide zones on parts of the slopes, and place about 90 homes on the western edge in Moderate or High Fire Hazard Severity Zones on the Local Responsibility Area map, with none in Very High and the rest of the residential streets mapped non-wildland. We prepare the drawings, make the submittal and handle plan-check corrections ourselves, so you are not the one chasing plan check.

Established single-family lots on streets that the County's Westside Area Plan describes as laid out to follow the contours of the hills. In the County Assessor's parcel map, the middle half of detached lots run about 6,400 to 8,300 square feet, with a median near 7,000. Lots open up on Kenway Avenue and Enoro Drive, where the median is just over 14,000 square feet and most houses date from the 1950s and 1960s. One local condition that shapes the work: Roughly 300 detached parcels on the western edge, along La Brea and Mansfield avenues and streets such as Northridge and Mioland drives, lie inside an Alquist-Priolo Earthquake Fault Zone on the Inglewood fault, so the mapped fault traces are worth locating before an ADU or addition is sited.

All of it, including View Park, Windsor Hills and View Park Historic District. 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.