ADUs & Additions in Highland 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. City maps place every single-family lot in Highland Park inside the Hillside Grading Area, so a pool that needs a building permit here also needs an LADBS grading permit for its excavation. In the Highland Park-Garvanza HPOZ, an in-ground pool in the rear yard of a non-corner lot is exempt from HPOZ review, but rear-yard grading on hillside lots, pools on corner lots and most work visible from the street are still reviewed. Most single-family lots here also carry the Hillside Construction Regulation (HCR) zoning suffix, which Ordinance 187,900 brought to the Northeast Los Angeles Community Plan Area effective July 24, 2023: weekday work runs from 8 a.m. to 6 p.m., and only interior work is allowed on Saturdays. We prepare the drawings, make the submittal and handle plan-check corrections ourselves, so you are not the one chasing plan check.

Compact lots with old houses: the median single-family parcel is about 5,500 square feet in LA County Assessor data, the middle half runs from roughly 4,700 to 7,000 square feet, and the median home was built in 1924. Lots fronting York Boulevard mostly sit outside the Hillside Area, while the streets climbing toward Mount Angelus fall inside it. One local condition that shapes the work: About two-thirds of single-family parcels sit in the city's Hillside Area, where the Baseline Hillside Ordinance limits grading quantities and the combined import and export of earth.

All of it, including Garvanza and Mount Angelus. 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.