Home & Room Addition Contractor in Hollywood Hills, CA

The typical Hollywood Hills house is a 1,400–2,400 sq ft prewar or mid-century home on a sloped canyon or ridge lot, and the addition that fits is decided by the slope before anything else: a room on the uphill side on stepped footings, a story added over the garage pad, or a cantilevered room on the view side engineered on caissons. Every one is a hillside project under the Baseline Hillside Ordinance, with its own height, grading and floor-area rules, and most are inside a Very High Fire Hazard Severity Zone as well.

An addition on a 1,400–2,400 sq ft prewar or mid-century house on a sloped canyon or ridge lot is engineered from the foundation up: footings and a floor to match the house, framing and a roof tied into the existing roof line, plumbing to the lateral for a new bath, electrical on new circuits, HVAC extended or a dedicated mini-split, and stucco, trim and windows matched so the addition reads as original. The electrical service here is typically 100-amp panels in most prewar and mid-century houses; a 200-amp LADWP upgrade is part of most full kitchens, and on a canyon lot the service drop itself is often the hard part, which is why a 200-amp upgrade is often part of the project.

We are based in Valley Glen, about 20–25 minutes away, and the project lead who does your consultation runs the build and is on site at every milestone. The first thing we do is pull your parcel on ZIMAS so you know the buildable square footage before you spend anything on drawings.

The Hollywood Hills run along the south face of the Santa Monica Mountains from Laurel Canyon and Nichols Canyon on the west through Outpost Estates and Whitley Heights to the Cahuenga Pass, Lake Hollywood, Beachwood Canyon and Hollywoodland on the east, with Mulholland Drive along the ridge and the Hollywood Sign above it. Our office is in Valley Glen, about nine miles away over Laurel Canyon or the 101, a 20–25 minute drive; permits run through LADBS, with plan check at the Metro Development Services Center downtown, and nearly every parcel is under the Baseline Hillside Ordinance.

The first thing we do is pull the parcel on ZIMAS: the hillside overlay, the Mulholland Scenic Parkway corridor where it applies, the Whitley Heights HPOZ, the fire zone and the floor-area limit, so you know what the lot allows before you spend anything on drawings. The addition is then engineered with a geotechnical report, permitted through LADBS at the Metro counter, and built with the access plan priced in: crane days, hand-carry and the neighbors' parking are line items, not surprises.

The addition is designed, structurally engineered and permitted through LADBS (City of Los Angeles) at the Metro Development Services Center, with inspections at foundation, framing, rough systems, insulation and final, and hillside review where the parcel requires it; the permit is closed at the end so the new square footage is on record when you refinance or sell.

A Hollywood Hills home addition typically needs a few months of design, structural engineering and LADBS plan check, then about three to five months of construction for a ground-floor addition and longer for a second story. On level lots the schedule is the most predictable part of the project; hillside parcels add grading and access review to plan check.

The sequence is plans and structural calculations, plan check at the LADBS Hollywood Hills office, then foundation, framing and roof tie-in, rough electrical, plumbing and HVAC with inspections at each stage, insulation, drywall, exterior match to the original stucco and finishes, and final inspection. Second stories add the structural evaluation and any reinforcement before framing. Your fixed-price proposal shows the whole schedule with realistic dates.

Verify the license at cslb.ca.gov (ours is 1021284) — active, classified for structural work, bond and workers' compensation on file — and get insurance certificates in writing. Ask who prepares the plans, who engineers the structure and who takes the permit through the LADBS Hollywood Hills office and answers plan-check corrections; a contractor who knows that counter keeps a Hollywood Hills project on schedule.

Require a written fixed-price contract with an itemized scope, named allowances, written change orders and progress payments tied to completed work; California caps the down payment at $1,000 or 10 percent, whichever is less. Ask how the addition's foundation, roof and stucco will be tied into a 1950s house so it reads as original, and who manages the schedule day to day.