ADUs & Additions in Hancock Park

Los Angeles Department of Building and Safety (LADBS). Private pools in the City of Los Angeles are permitted through a Combined Building-Mechanical permit, while pools serving more than two dwelling units need separate building, electrical, plumbing and mechanical permits. Using a City of Los Angeles standard plan on file with LADBS reduces plan check time. The blocks from Highland Avenue to Rossmore Avenue, between Melrose Avenue and Wilshire Boulevard, form the Hancock Park Historic Preservation Overlay Zone. Its preservation plan exempts rear-yard pools and decks, grading, and detached accessory structures that are not contributing and not visible from the street, as determined by Planning staff, unless the work is in the public right-of-way or the property is under a Historical Property Contract. Pools or decks elsewhere on the lot, front-yard fences, walls and hedges, and new paving outside existing walk and driveway footprints go to the Director of Planning as conforming work. Additions that stay off the street-visible facades and add less than 30 percent to the square footage that existed when the HPOZ took effect are exempt, while a cumulative addition of 30 percent or more to a contributing house needs a Certificate of Appropriateness. We prepare the drawings, make the submittal and handle plan-check corrections ourselves, so you are not the one chasing plan check.

Spacious single-family lots, most of them built on in the 1920s and 1930s. Inside the preservation zone the median single-family parcel is about 12,000 square feet in LA County Assessor data, with the middle half running from roughly 8,000 to 18,000 square feet, and the typical house sits well back behind a raised front lawn with its garage at the rear. One local condition that shapes the work: Much of the preservation zone lies over the Salt Lake Oil Field as mapped by the state, and LADBS methane mitigation rules under Division 71 of the Los Angeles Building Code cover additions in its Methane Zones and Methane Buffer Zones, so a parcel's methane status is confirmed before an ADU slab or addition foundation is designed.

All of it, including Wilshire Country Club, Rossmore Avenue, June Street and Hudson Avenue. 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.