Design inspirationHome Addition Contractors in Los Angeles
Room, second-story, kitchen and primary-suite additions across Greater Los Angeles, coordinated under one contract.
Home additions across Greater Los Angeles
Quick answer: HomeAdd plans and builds home additions in Los Angeles, with service in southern Ventura County as well. Room additions, second stories, master suites and kitchen expansions are coordinated through feasibility, design, engineering, permitting and construction. Planning prices start at $175K for the existing mid-size home-addition scope; a written proposal follows feasibility and design.
Choosing home addition contractors in Los Angeles starts with defining what needs to change: more bedrooms, a larger kitchen, a new primary suite or another story. A home addition can change the floor plan, roofline and mechanical systems, so design, structural engineering and construction need to be considered together.
HomeAdd's larger additions typically fall between 500 and 1,800 square feet and combine an exterior addition with reworked interiors: new kitchen, new primary suite, opened sight lines to the yard. We build in Woodland Hills, Encino, Tarzana, Sherman Oaks, Studio City, Calabasas, and across the greater LA basin.
After design, every project moves into a detailed written construction proposal with defined scope, itemized allowances, and a written change-order process so the numbers are clear before we swing a hammer.
Common home addition options.
New wing
A full new wing with bedrooms, bath, and living space — usually off the rear or side of the house. Best when the lot is generous.
Second-story pop-up
Double your footprint without touching the yard. New bedrooms, bath, and often a bonus room over the existing first floor.
Primary suite + great room
A new primary suite plus an expanded family room and kitchen for open-plan living.
Kitchen + family room expansion
Bump out the back of the house 14–20 feet, open the kitchen, add a huge slider to the yard.
Multigenerational addition
Ensuite bedroom, sitting room, and often a second kitchenette — one house, two households, one utility bill.
Full remodel + addition
When the existing house needs work too, we combine the addition with a full interior refresh on one contract and one schedule.
What's included in every HomeAdd project.
Every phase, in order.
- 1Discovery & feasibility
Site visit, zoning + FAR check, budget alignment, and a written scope.
- 2Schematic design
Floor plans, elevations, and renderings until the design is right.
- 3Construction documents
Structural engineering, Title 24, MEP design, and permit set.
- 4Plan check & permits
Local plan-check submittal, correction cycles, and permit issuance.
- 5Site prep, demo, foundation
Site protection, selective demolition, new footings and slabs.
- 6Framing & envelope
Framing, roofing, windows, exterior weather barrier and stucco.
- 7MEP & insulation
Rough electrical, plumbing, HVAC — inspections and insulation.
- 8Interior finishes
Drywall, cabinetry, tile, flooring, paint, and trim.
- 9Final inspections & handoff
Building final, punch list, walkthrough, and closeout package.
Planning ranges (Los Angeles & Ventura)
Preliminary planning ranges vary by jurisdiction, site conditions, design, utilities, and finish level. A written proposal follows feasibility and design.
Primary suite addition or single-wing addition with builder-grade to mid-range finishes.
Multi-room addition, kitchen refresh, HVAC upgrades, upgraded finishes.
Second story or full wing plus interior remodel. Custom architecture and premium finishes.
Filed, corrected, inspected — by us.
We prepare and submit the permit package to the department that reviews your address, whether that is LADBS, LA County, Ventura County, or a city building department in Los Angeles or Ventura County. You never touch a portal, sit on hold, or drive to a counter.
- Local building permit
- Structural plan check & engineering
- Title 24 energy compliance package
- Grading & drainage permit (as required)
- Mechanical, Electrical, Plumbing permits
- Panel upgrade & utility coordination
- Hillside, coastal, or HPOZ review (as applicable)
- Final building inspection & CofO where required
Home addition permits: City of LA vs. Los Angeles County
An address inside the City of Los Angeles follows the city's building and planning review: LADBS handles building plan check, permits and inspections, and Los Angeles City Planning handles zoning and applicable planning requirements. Confirm setbacks, height, lot coverage and any overlays before committing to an addition layout.
Unincorporated Los Angeles County addresses use County Building and Safety and Regional Planning rather than the City of LA process. Other incorporated cities have their own review arrangements. Begin by confirming the jurisdiction, prepare the required design and engineering documents, resolve plan-check corrections and obtain permits before construction. Site conditions and local requirements vary.
- LADBS — building permits and plan check ↗
City of Los Angeles building review and inspections.
- Los Angeles City Planning ↗
City of Los Angeles zoning and planning requirements.
- LA County Building and Safety ↗
Building review for unincorporated Los Angeles County.
- LA County Regional Planning ↗
Zoning and land-use review for unincorporated county parcels.
What this scope typically looks like.
Representative planning images of the kind of build described above.
Questions homeowners ask first.
Still have questions? Call (877) 544-1543 or request a callback — a HomeAdd project advisor will walk your address on Google Earth with you on the phone.
Do I need to move out during a big addition?+
For 500–800 sq ft additions on the back or side of the house, most families stay put. For second stories or additions that involve the kitchen or a single-bath home, we recommend budgeting for temporary housing during the loud phases. We'll tell you honestly in design.
How long does an LA home addition really take start to finish?+
It depends on the jurisdiction, scope, design and how quickly plan-check corrections are resolved. Design and permitting are a significant share of the total; a realistic schedule comes with the proposal.
Is design + build actually cheaper than architect + separate GC?+
Not always cheaper on paper, but far more predictable. A single coordinated team from design through construction removes the bid-vs-build mismatch and reduces finger-pointing between architect and contractor.
Can I combine an addition with a full remodel?+
Yes — and often you should. Adding to a dated house without updating the existing rooms creates a visible seam. Addition, kitchen, primary bath and flooring work can be packaged into one contract.
How do you handle setbacks, FAR, and height limits?+
That's the first thing we check in feasibility. If the lot won't support what you want, we tell you early. Sometimes the answer is a second story instead of a rear extension; in some cases a variance may be an option, which the city decides.
What about the neighbors?+
We introduce ourselves before demo, share the schedule, and manage parking and deliveries so the block stays livable.
Other ways to grow your home.
Double your square footage without touching the yard — a full second floor built above your existing home.
A kitchen addition bumps out the back of the house, takes down the wall, and makes the kitchen the heart of the home.
A private new primary bedroom, walk-in closet, and spa bath — added to your existing home.
Bigger living space with vaulted ceilings, a fireplace, and doors that open to the yard.
A fully permitted, insulated, four-season room with glass walls and matched roofline.
A brand new full or half bath added to your home — designed and permitted end-to-end.
Ready to plan your home addition?
We'll walk your property, pull the zoning, and give you a real budget and timeline — before you spend a dollar on design.