Home Addition Contractor in Westlake Village

Start with the order of approvals. A Westlake Village addition needs HOA approval before the City's Zoning Clearance, and the Zoning Clearance before the Los Angeles County building permit filed through EPIC-LA, because the city has no building department of its own. A contractor who knows that chain files in sequence and loses no cycles. Then ask who engineers the second story and who signs the fixed-price scope. Master Construction holds Lic. #1027281, is licensed and insured, has been family owned since 1994, and carries the association package, both approvals and the build with our own concrete, electrical, plumbing and stucco crews.

The type and size come first: a bump-out, a ground-floor room addition, an over-garage room and a second story are different jobs. Structure follows. A second story means engineering the existing slab and walls and taking part of the roof off, and the City requires a soils report unless waived. Utilities come next: whether the panel carries the new load, and whether HVAC extends or a new heat pump goes in. A lot mapped Very High may add a fuel modification plan, and over 500 sq ft of new living space brings a school fee. Finishes close the list. We walk the house, then write a fixed-price scope.

The approvals come in order, so count them before construction. The HOA's architectural committee reviews on the schedule its governing documents set, and Civil Code 4765 requires those documents to state a maximum response time. The City's Zoning Clearance follows, and the County permit cannot issue until it is approved; in EPIC-LA we book virtual appointments with the plan check engineer to clear corrections. A planned development permit adds a Planning Commission decision. How long County plan check takes varies with workload and the season. On site, a bump-out is the shortest build and a second story the longest, because the roof comes off over part of the house.

Los Angeles County Public Works Building and Safety, under contract to the city. Its Calabasas District Office at 27001 Agoura Road, Suite 250, handles plan check and inspections, and applications have gone through the EPIC-LA portal since April 1, 2024; the main line is (818) 880-4150. The City's part is the Zoning Clearance from Planning at City Hall, 31200 Oak Crest Drive, which must be approved before the County permit issues. The City requires your HOA's approval before it accepts that application. Larger additions may also need a planned development permit from the Planning Commission.

The zoning usually allows it. R-1 and RPD both permit two stories up to 35 ft, though six neighborhoods carry recorded conditions that supersede the general code. The design chapter then asks the second floor to respect neighbors' privacy and views and avoid an over-built look, and First Neighborhood requires window sills at least 7 ft above the floor within 5 ft of a property line. Your HOA reviews massing and height on top of that. The structure is the last test: an engineer checks the existing footings and shear walls, because a slab poured for one story may need strengthening to carry two.

It can. CAL FIRE's March 2025 maps changed severity zones across Westlake Village, and some neighborhoods now sit in moderate, high or very high zones, so we check your parcel on the state map before design. On a lot in the Very High zone, LA County Fire's Forestry Division requires a fuel modification plan for an addition equal to 50 percent or more of the existing square footage, with a recorded covenant and a landscape inspection. From January 2026 the County plan-checks Very High lots against the 2025 Wildland-Urban Interface Code: Class A roof, ember-resistant vents, ignition-resistant walls and multi-pane glazing with a tempered pane.

For most ground-floor work, yes. We build a room addition or bump-out behind the existing exterior wall, then open the connection late in the job behind dust barriers, so the kitchen and bedrooms keep working for most of the schedule. An over-garage room mostly affects the garage below, which means parking on the driveway for a stretch. A second story is harder, since part of the roof comes off and the floor below becomes a work zone; many families leave for that phase. The whole-house smoke alarm upgrade also reaches occupied rooms. The schedule names each room's offline dates before you sign.

Yes. The City's residential Zoning Clearance application requires proof of homeowners association approval, so the board's architectural committee sees the design before Planning does. Civil Code 4765 requires the association to decide in good faith and in writing, explain any denial and offer reconsideration, but it does not override the CC&Rs themselves. Within the City's two-story, 35 ft limit, the association's recorded standards decide massing, height and materials. We draw the committee package to the same sheets the City and County will review, so an approved design does not need redrawing at the next desk.

Build an addition when the space belongs to the household: a primary suite on the ground floor, a parent's bedroom, an office over the garage. It shares the kitchen, keeps the two-car garage the city requires, and only the added value is reassessed. Build an ADU when the goal is a separate unit with its own entry and kitchen, for a relative who wants independence or a long-term tenant. The rules differ, including how the HOA can respond, and they are laid out on our ADU construction in Westlake Village page. We build both and will tell you which fits the lot.