Home & Room Addition Contractor in Beverly Hills, CA

The typical Beverly Hills house is a 2,500–5,000 sq ft 1920s–60s estate on an 8,000–20,000 sq ft lot, and the addition that fits is a wing rather than a room: a primary suite with a dressing room and a bath, a family room opening to the garden, or a second story on a house in the Flats, all matched to a Spanish, Traditional or mid-century exterior at the finish level the street expects.

An addition on a 2,500–5,000 sq ft 1920s–60s estate on an 8,000–20,000 sq ft 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 older 100- to 125-amp panels in large houses; a 48-inch range, column refrigeration and EV charging usually mean a 200-amp Southern California Edison service upgrade, which is why a 200-amp upgrade is often part of the project.

We are based in Valley Glen, about 25–35 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 the city's parcel map so you know the buildable square footage before you spend anything on drawings.

Beverly Hills is its own city with its own Building & Safety Division at City Hall, its own water utility and Southern California Edison for power, and a single-family zoning code divided into three regulated areas: the Central Area, which is the Flats north of Santa Monica Boulevard, the Hillside Area north of Sunset, and Trousdale Estates with its 14-foot single-story height limit. The blocks south of Wilshire carry the city's 1930s–50s single-family and duplex streets. Our office is in Valley Glen, about 10 miles north over Coldwater Canyon or Beverly Glen, a 25–35 minute drive. One caution: Beverly Hills Post Office addresses north of the city line are City of Los Angeles and go through LADBS, and we confirm the jurisdiction on the parcel before anyone draws a plan.

Each of the city's three single-family areas has its own rules: floor-area and setback limits in the Central Area, with planning review for larger projects and street-facing changes; hillside grading and height rules north of Sunset; and the 14-foot single-story limit in Trousdale, where the addition spreads out rather than up. The first thing we do is pull the parcel on the city's map and tell you what the lot allows before any drawing; the addition is then engineered and permitted through the City of Beverly Hills Building & Safety Division, not LADBS, and built by one crew.

The addition is designed, structurally engineered and permitted through the City of Beverly Hills Community Development Department, Building & Safety Division,, 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 Beverly Hills home addition typically needs a few months of design, structural engineering and Beverly Hills Building and Safety 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 Building and Safety counter at City Hall, 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 Building and Safety counter at City Hall and answers plan-check corrections; a contractor who knows that counter keeps a Beverly 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.