Need More Space? Room Additions Built Right in Los Angeles
Your family is growing but your house is not. Maybe you need another bedroom, a bigger living room, or a home office that is actually separate from the rest of the house. A room addition is the best way to get the space you need without moving.
At Luz Builders, we have been building room additions across Los Angeles and the San Fernando Valley for over 11 years. We handle everything from architectural plans and permits to foundation work, framing, and final finishes. You get one team managing the entire project from start to finish.
We are a family-owned construction company based in West Hills. We are not a franchise, and we do not hand your project off to subcontractors you have never met. When you hire us, our crew does the work. That is how we keep the quality consistent and the communication clear.
What We Build: Room Addition Types
Every home and every family is different. Here are the types of room additions we build.
Second Story Additions
Add an entire second floor to your single-story home. We reinforce the existing foundation, build the structural framing, and create new bedrooms, bathrooms, or living spaces upstairs. This is the best option when your lot does not have room to expand outward.
Family Room Extensions
Expand your living room or family room to create a larger, more open gathering space. We can open up walls, extend the footprint of your home, and create the kind of room where your whole family actually fits comfortably.
Bedroom Additions
Add a new bedroom for a growing family, an aging parent, or a guest room. We build bedrooms with proper closet space, windows for natural light, and electrical and HVAC connections. Adding a bedroom with a bathroom is one of the best ways to increase your home value.
Sunrooms
A sunroom gives you an indoor-outdoor living space that works year-round. Large windows, vaulted ceilings, and proper insulation make it comfortable in summer heat and winter chill. Great for a reading room, dining area, or a place to enjoy your backyard views.
Bump-Outs
A bump-out is a smaller addition that extends an existing room by a few feet. Perfect for making a tight kitchen, bathroom, or bedroom a little more usable. Bump-outs are faster and more affordable than a full addition but can make a big difference in how a room feels.
Garage to Living Space
Convert your garage into a bedroom, office, playroom, or studio. We handle insulation, flooring, drywall, electrical, HVAC, and windows. Garage conversions are a cost-effective way to add livable square footage without changing the footprint of your home.
Foundation & Structural
Room additions need solid structural work. We pour new foundations, tie into existing footings, reinforce load-bearing walls, and install proper headers and beams. Our structural engineer reviews every project to make sure it is built right and built to last.
Permits & Engineering
Every room addition in LA requires permits, plans, and engineering. We manage the entire process, from architectural drawings and structural calculations to city plan check and final inspection. You do not have to deal with the building department at all.
Room Additions We Have Built
Real projects, real results. Here are some of the room additions we have built for homeowners across Los Angeles.
Why Homeowners Choose Luz Builders for Room Additions
One Team, Start to Finish
We do not hand your project off to random subcontractors. Our own licensed crew handles foundation, framing, electrical, plumbing, drywall, and finishes. One company, one project manager, no confusion about who is responsible for what.
Honest Pricing
Room additions are big investments. You get a detailed written estimate that breaks down every cost before we start. No hidden fees, no surprise change orders. The price we quote is the price you pay unless you decide to change the scope.
Permits & Plans Handled
Room additions in Los Angeles require architectural plans, structural engineering, and multiple permit approvals. We manage the entire permit process and schedule all inspections so you do not have to chase the city or figure out the paperwork.
Structural Engineering
Every room addition we build is reviewed by a licensed structural engineer. From foundation design to load calculations and seismic requirements, the structural integrity of your addition is never an afterthought. We build it to last and build it to code.
Seamless Integration
The new addition should look like it was always part of your home. We match rooflines, siding, windows, and interior finishes so the transition between old and new is invisible. Nobody should be able to tell where the original house ends and the addition begins.
Licensed, Bonded & Insured
California contractor license #1151171. General liability and workers compensation on every job. Your home and your project are fully protected from day one.
What Our Clients Say
We hired them for a full bathroom remodel and they were great to work with. They showed us material options, explained everything clearly, and the final result looks amazing. My neighbors keep asking who did the work.
They redid our whole kitchen and it came out better than we expected. The crew was professional, showed up on time every day, and kept the workspace clean. Would hire them again without thinking twice.
Honest people. They gave us a fair price, stuck to it, and the work was top quality. You can tell they actually care about what they do. Rare to find that these days.
We had them build an ADU in our backyard. They handled the permits, the design, everything. We were worried it would drag on forever but they finished right on schedule. Really happy with how it turned out.
Got a second story addition done on our house. Big project, lots of moving parts. They kept us updated every step of the way. No surprises on the bill either, which I really appreciated. Solid team.
Luz Builders replaced our roof after it started leaking last winter. They came out the same week, gave us an honest quote, and had the whole thing done in three days. Very professional and clean crew.
We got quotes from five different contractors for our home remodel. Luz Builders wasn't the cheapest but they were the most thorough in explaining what needed to be done. Glad we went with them. The results speak for themselves.
They converted our garage into a studio ADU for my mother-in-law. It came out beautiful. The whole family is happy. They treated us with respect and were patient with all our questions. Highly recommend.
Our Room Addition Process
We keep it straightforward. Here is what happens when you hire us for a room addition.
Free In-Home Consultation
We come to your home, look at the space, and talk about what you need. We assess your property, check setback requirements, and give you a realistic idea of what is possible within your budget. No cost, no pressure.
Design & Engineering
Our architect draws up plans for your addition. Our structural engineer designs the foundation and framing. You see exactly what the addition will look like, how it connects to your existing home, and what it will cost. Everything is spelled out before we start.
Permits & Approvals
We submit plans to the City of Los Angeles or your local building department. We handle plan check corrections, zoning reviews, and any other approvals needed. Once permits are issued, we schedule materials and prepare the site for construction.
Construction
Our crew gets to work. Foundation, framing, roofing, electrical, plumbing, HVAC, insulation, drywall, flooring, and finishes. You get regular updates and direct access to your project manager throughout the build. We keep the jobsite clean and your home protected.
Final Inspection & Handover
We schedule the final city inspection, walk through every detail with you, and make sure everything meets your expectations. Once the addition passes inspection, we do a full cleanup and hand over your new space ready to use.
Get a Free Room Addition Estimate
Tell us about your room addition project and we will get back to you within 24 hours with a free estimate. Or call us directly if you prefer to talk.
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Room Additions Across Los Angeles
Based in West Hills, we build room additions throughout the San Fernando Valley and greater Los Angeles area.
Room Addition FAQ
How much does a room addition cost in Los Angeles?
Room additions in Los Angeles typically cost between $200 and $500 per square foot depending on the type of addition and level of finishes. A basic single-story room addition starts around $80,000 to $120,000. A mid-range addition with a bathroom runs $120,000 to $200,000. A second story addition is on the higher end because of the structural and foundation work involved, usually $250,000 and up. We provide a detailed written estimate after visiting your home so you know exactly what to budget for.
How long does a room addition take to build?
Most room additions take between 3 and 6 months from permits to completion. A simple bump-out or small single-room addition can be done in 8 to 12 weeks. A larger addition with a bathroom or kitchen typically takes 4 to 5 months. A full second story addition is the most involved and usually takes 5 to 7 months. The permit process in Los Angeles adds 4 to 8 weeks before construction starts, depending on the scope. We give you a clear timeline upfront and keep you updated throughout the project.
Do I need permits for a room addition in Los Angeles?
Yes. Every room addition in Los Angeles requires building permits. You will need architectural plans, structural engineering, and approval from the Department of Building and Safety. Depending on the project, you may also need approvals from zoning, fire, and the school district. We handle the entire permit process for you, from plan preparation to final inspection sign-off.
Can you build a second story addition on my house?
Yes. Second story additions are one of our specialties. We start with a structural assessment of your existing foundation and framing to determine what reinforcement is needed. Our structural engineer designs the support system, and we handle everything from foundation upgrades to framing, roofing, and interior finishes. We have built second story additions across West Hills, Woodland Hills, Encino, and throughout the San Fernando Valley.
Will a room addition increase my property value?
Yes. A well-built room addition typically returns 50 to 70 percent of the investment in added home value, and in high-demand Los Angeles neighborhoods, the return can be even higher. Adding a bedroom and bathroom, building a second story, or expanding your living space all increase your square footage and make your home more attractive to future buyers. The key is quality construction and proper permits so the added space is legally recorded.
Can I stay in my home during a room addition?
In most cases, yes. For single-story additions and bump-outs, the work is mostly happening in a new area so your daily life is not too disrupted. For second story additions, there will be periods where things get louder and messier, especially during framing and roofing. We set up dust barriers, protect your existing living spaces, and keep the jobsite organized so you can stay comfortable. We will let you know upfront if there are any phases where you might want to plan around the noise.
Room Additions in West Hills and the San Fernando Valley
If you are looking for a room addition contractor in West Hills, Woodland Hills, Calabasas, Encino, or anywhere in the San Fernando Valley, Luz Builders is the company homeowners trust. We have been building room additions in this area for over 11 years. We know the zoning codes, the permit process, and the structural requirements for adding onto homes in the LA area.
Room Addition Costs in Los Angeles: What to Expect
Room addition costs in Los Angeles are higher than the national average because of labor rates, permit fees, engineering requirements, and material costs in Southern California. Here is a rough breakdown:
- Bump-out (50-100 sq ft): $40,000 to $80,000. Great for expanding a kitchen, bedroom, or bathroom by a few feet.
- Single-room addition (150-300 sq ft): $80,000 to $150,000. A new bedroom, family room, or home office.
- Addition with bathroom (200-400 sq ft): $120,000 to $200,000. Adding a bedroom and bathroom is one of the best investments you can make.
- Second story addition (500-1,000+ sq ft): $250,000 to $500,000+. The most involved type of addition but doubles your living space without using any yard.
- Garage conversion: $50,000 to $100,000. Converting an existing garage to a bedroom, office, or studio.
The best way to get an accurate number is to have us come look at your home. We give free estimates with a detailed cost breakdown so you can make an informed decision.
Types of Room Additions We Build in Los Angeles
Every home addition project is different. Some homeowners need a single extra bedroom. Others want to add an entire second floor. Here are the most common types of room additions we build:
- Second story additions for homeowners who want more space but have a small lot with no room to build out
- Family room and living room extensions to create larger gathering spaces for everyday living
- Bedroom additions with closets, bathrooms, and proper HVAC connections
- Sunrooms and enclosed patios for year-round indoor-outdoor living
- Garage conversions to turn unused garage space into a functional room
- Kitchen expansions that open up the layout and add more counter and storage space
Room Addition Permits in Los Angeles
Every room addition in Los Angeles requires permits from the Department of Building and Safety. The permit process includes submitting architectural plans, structural engineering calculations, and meeting zoning requirements like setbacks, lot coverage, and height limits. Depending on your neighborhood, you may also need approvals from the fire department or school district. We handle the entire permit process so you do not have to deal with any of it.
Room Addition Trends in Los Angeles (2025-2026)
Right now we are seeing a lot of homeowners in West Hills, Woodland Hills, and surrounding areas building these types of additions:
- Second story additions are more popular than ever as homeowners maximize their lot without losing yard space
- Multi-purpose rooms that work as a home office, guest room, and flex space depending on the day
- Primary suite additions with a large bedroom, walk-in closet, and spa-style bathroom
- Open-concept family room extensions that connect to the kitchen and outdoor living areas
- Garage conversions with ADU potential that can be used as a guest house or rental unit
We build whatever you need. If you have an idea for your home, we can tell you what is possible and what it will cost. Just give us a call or fill out the form above.
Ready to Add More Space to Your Home?
Call us today or fill out our form for a free estimate. We will come to your home, assess the project, and give you an honest price.