Building a new home in Los Angeles is one of the most rewarding projects a homeowner can take on, and one of the most involved. Between zoning, multiple reviewing agencies, hillside and fire rules, and a long list of inspections, the process has many steps. Knowing the order of those steps helps you plan your time, your team and your decisions. This guide walks through the new home construction process in Los Angeles, whether you are building on a vacant lot or replacing an existing house.
Step 1: Lot due diligence
Everything starts with what the lot allows. In the City of Los Angeles, the ZIMAS zoning map is a good first stop. It shows:
- Zoning and setbacks: the base rules for size, height and placement.
- Overlays: specific plans, historic preservation overlay zones and other districts that add design rules.
- Hillside status: whether the Baseline Hillside Ordinance applies.
- Fire hazard zone: Very High Fire Hazard Severity Zones carry stricter building standards.
- Other flags: liquefaction, fault zones, or methane zones that affect foundation design.
For lots outside the City of Los Angeles, check with that city's planning department or LA County for unincorporated areas. Our Los Angeles service area page lists the communities we work in.
Step 2: Assemble the design team
A new home needs more than a floor plan. A typical team includes:
- An architect or designer for the plans
- A structural engineer
- A geotechnical engineer for the soils report, and a geologist on hillside lots
- A civil engineer for grading and drainage when needed
- A Title 24 energy consultant
- A fire sprinkler designer
Bringing a licensed general contractor in during design helps catch buildability issues and keeps selections realistic.
Step 3: Design decisions that shape the project
Before plans are finished, settle the big choices:
- Size and layout: the zoning rules set the outer limits, and your needs fill them in.
- Single story or two stories: this affects foundation, structure and yard space.
- Energy systems: California's energy code requires solar on most new single-family homes and favors efficient electric heat pumps.
- Fire-resistant materials: required in fire hazard zones, and a smart choice anywhere.
- An ADU: many LA homeowners add an ADU during new construction so utilities and permits are planned together.
Step 4: Plan check and clearances
In the City of Los Angeles, plans go to LADBS for plan check. Reviewers check the building, structural, energy, green building and fire codes. A new home often needs clearances from other departments too, such as:
- Planning for zoning compliance
- Fire Department for access, hydrants and fire zone rules
- Bureau of Engineering for work in the public right-of-way, driveways and sewer
- Department of Water and Power for electric and water service
- Urban Forestry if protected trees or street trees are affected
Expect at least one round of plan check corrections. Hillside lots usually also need grading review and geology approval. A complete, well-coordinated plan set is the best way to keep review moving.
Step 5: Demolition for teardown projects
If you are replacing an existing house, add these steps before construction:
- An asbestos survey, required by Southern California air quality rules before demolition
- Safe disconnection of gas, power, water and sewer
- A demolition permit, which in the City of Los Angeles may include a notice period and tree review
Step 6: Construction phases and inspections
Once permits are issued, construction follows a set sequence. Each phase is inspected before work continues:
- Site work and grading: clearing, excavation and the building pad, with grading inspections on hillside lots.
- Foundation: footings or caissons, rebar and underground utilities, inspected before the pour.
- Framing: walls, floors, roof and shear walls, which matter in earthquake country.
- Dry-in: roofing, windows and exterior doors.
- Rough-in: plumbing, electrical, mechanical and fire sprinklers.
- Insulation and drywall: with energy and insulation inspections.
- Finishes: cabinets, flooring, tile, fixtures, paint and exterior finishes.
- Final inspection: the city signs off and issues the Certificate of Occupancy.
How long does it take?
There is no single timeline for a new home in Los Angeles. Design and engineering can take months on their own, and plan check length depends on the project, the reviewing agencies and how complete the first submittal is. Hillside lots, teardown projects and lots with overlays usually add steps. Construction time depends on the size of the home, site conditions and how early selections are made. The best way to protect your schedule is to start due diligence early and keep decisions ahead of the work.
Step 7: Utilities and final service
Coordinating new utility service takes time, so start early. In the City of Los Angeles, LADWP handles electric and water service. Other areas may be served by Southern California Edison and local water districts, with SoCalGas for natural gas. Ask about service timelines during design, not at the end of construction.
Tips for a smoother build
- Verify the lot first: a surprise hillside or fire zone designation changes the whole plan.
- Finalize selections early: changes after plan approval can need revisions.
- Plan for review time: plan check and clearances are often a big part of the total schedule.
- Work with a licensed contractor: check any contractor's license on the Contractors State License Board website.
Ready to start your new home?
RD Fast Construction Inc. is a California Class B general contractor, CA Lic. #1105076, licensed since 2023. Owner Rafael Diaz has 10+ years in construction. We build ground-up homes and teardown-and-rebuild projects across Los Angeles and can review your plans or help you map out next steps. CALL OR TEXT (213) 842-1229 to talk about your lot.