A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateTrusted Home Addition Contractor for Los Angeles Homeowners
A home addition in Los Angeles typically costs between $180 and $450 per square foot for standard construction, with most full-scale room additions landing between $85,000 and $190,000 depending on size, finish level, and site conditions. Lodgewick ADU Los Angeles, led by Russ Delmar, has been building additions, ADUs, and garage conversions across Los Angeles since 2010. Every project starts with a written price before any work begins, and every job is backed by our 365-Day Done Right Promise in writing. If you’re weighing a sunroom in West Los Angeles or a second story in Hancock Park, call us at (213) 698-7116 for a free estimate and straight answers.
We know Los Angeles homeowners have been burned before: a contractor who never showed, a price that doubled mid-project, a crew that left debris in the driveway. That’s why home additions through Lodgewick run on The Kingswell Way: say the price before the work, show up in the window given, leave the place cleaner than found, put the guarantee in writing, and come back if it fails.
Sunroom Addition
A sunroom addition is a glass-enclosed living space attached to your home, designed to bring in natural light while giving you usable square footage for lounging, dining, or a home office. In Los Angeles, sunroom additions typically run $40,000 to $95,000 depending on glazing, framing, and whether you’re adding climate control. Our Home Addition Contractor in Los Angeles handles the full build: foundation or slab, framing, glazing, roofing tie-in, and finish work, with a written price before we start and a written guarantee when we’re done.
Glass Selection and Climate Control
Los Angeles sun exposure varies sharply by neighborhood: a south-facing sunroom in View Park-Windsor Hills gets hammered by afternoon heat, while a Venice lot gets marine layer mornings. We spec low-E glazing and ventilation appropriate for your orientation, and we’ll tell you honestly whether operable windows, ceiling fans, or a mini-split make sense. No change orders at the door: the written price covers what we agreed to.
Permitting and Lot Conditions
Sunrooms in Los Angeles often trigger setbacks and lot coverage rules, and some hillside lots in Palms or Koreatown need soils reports before footings get poured. Russ Delmar’s team pulls permits, schedules inspections, and passes them. If your sunroom needs to double as an ADU down the line, we design it so the conversion path stays open.
Room Addition Contractor
A room addition contractor builds out new conditioned square footage attached to your existing home: a family room, a den, a home office, or a main-floor primary suite. In Los Angeles, room additions typically run $150 to $350 per square foot, with most projects landing between $70,000 and $160,000 all-in. Lodgewick ADU Los Angeles serves as your single point of contact from design through final inspection, and the price you’re quoted is the price you pay.
Foundation and Structural Integration
Room additions in Los Angeles sit on slab-on-grade or raised foundations depending on your existing structure, and matching rooflines on older Craftsman bungalows in Hancock Park takes real framing skill. We tie into your existing foundation and roof so the addition doesn’t look glued on. The Kingswell Guarantee covers the structural work in writing for 365 days, with a free return visit if anything fails.
Design That Matches the Existing House
We match stucco texture, roofline pitch, window style, and interior trim so the new space reads as original. A room addition in Century City shouldn’t announce itself as a later add-on. Before we write your price, we walk the lot, check access for equipment, and confirm where plumbing and electrical will route.
Second Story Addition Contractor
A second story addition contractor builds upward instead of outward, adding an entire level to your home when the lot is too small to expand sideways. In Los Angeles, second story additions typically run $250 to $450 per square foot, with most projects landing between $150,000 and $350,000 because the work involves structural reinforcement, stair placement, and re-roofing. Lodgewick ADU Los Angeles plans the structural engineering, works through the seismic requirements, and keeps your ground floor livable during the build where possible.
Engineering and Seismic Requirements
Los Angeles is earthquake country, and a second story addition with our Home Addition Contractor in Lawndale or in Manhattan Beach means shear walls, hold-downs, and often foundation upgrades. We bring in licensed structural engineers and pull all permits, so the work passes inspection the first time. The written price includes the engineering, not as a surprise line item later.
Living Through the Build
Adding a second story with a Home Addition Contractor in Culver City doesn’t always mean moving out, but it does mean planning around roof removal, stair framing, and weather. We sequence the work to protect your home from the elements and set a real arrival window for every crew. You’ll know who is on your property: every technician is background-checked and uniformed, and a live person answers our phone around the clock if you have questions.
Garage Addition Contractors
Garage addition contractors expand or convert your existing garage into livable square footage, whether that’s a new ADU, a studio, a workshop, or a connected living space. In Los Angeles, garage additions and conversions typically run $120,000 to $220,000 for a full standalone ADU, while attached garage expansions run $80,000 to $150,000. Lodgewick ADU Los Angeles builds both, and the written price is on the table before any demo starts.
Garage Conversion ADUs
A garage conversion is one of the fastest ways to add a rentable unit or in-law suite on a Los Angeles lot, and we know the local ADU ordinances: setbacks, parking replacement rules, and utility requirements. We work with prefab manufacturers like Abodu and Cover when the timeline matters, and we’re familiar with James Hardie siding systems for exterior finishes that hold up to coastal air in Venice and Santa Monica. The conversion gets its own written guarantee, same as any full build.
Attached Garage Expansions
Expanding an attached garage into living space in West Los Angeles means insulating walls, raising floors to match the house, and reworking the roofline where the two structures meet. We handle the demo, framing, electrical, drywall, and finish work end to end. If your garage slab has settled, we’ll tell you before we write the price, not after we open the walls.
Bathroom Addition Contractor
A bathroom addition contractor builds new full or half bathrooms where none existed: off a primary bedroom, in a converted closet, or as part of a larger room addition. In Los Angeles, bathroom additions typically run $35,000 to $75,000 depending on plumbing routing, fixtures, and waterproofing scope. Lodgewick ADU Los Angeles handles the plumbing rough-in, venting, electrical, tile, and fixtures with a written price first.
Plumbing and Venting Reality Check
Bathroom additions in Los Angeles live or die by plumbing access: how far the waste line has to run, whether the vent can reach the roof, and whether the existing water heater has capacity. We assess all three before quoting, so you’re not hit with a re-pipe surprise after the tile goes in. The Kingswell Guarantee covers the work in writing for 365 days.
Finishes That Last
We install waterproofing systems behind the tile, not just on top of it, and we spec exhaust fans sized for the room’s actual cubic footage. In humid Los Angeles months, a poorly vented bathroom addition in Koreatown will grow mold inside a year. We build it so it doesn’t.
Bedroom Addition Contractor
A bedroom addition contractor adds a sleeping room with proper egress, closet space, and HVAC to your existing home, often as a primary suite or a growing-family expansion. In Los Angeles, bedroom additions typically run $60,000 to $130,000 depending on size, whether a bathroom is included, and structural work required. Lodgewick ADU Los Angeles builds to code, handles the permits, and hands you a written guarantee when the room is done.
Egress, Closets, and Code
A bedroom in Los Angeles has to meet specific egress requirements: window size, sill height, and a direct path to the exterior. We design bedrooms that satisfy code on paper and feel good to sleep in, with closet depth that actually holds clothes and HVAC runs that keep the room comfortable year-round. If you’re planning a future rental or ADU on the lot, we’ll flag that now so the bedroom addition doesn’t block it.
Adding Square Footage Without Moving
For homeowners in Palms or View Park-Windsor Hills who’ve outgrown their house but love their street, a bedroom addition is the practical answer: same lot, more room, no moving truck. We keep the job site clean, set real arrival windows, and leave the existing rooms you’re living in protected from dust and traffic. Russ Delmar’s team has been building these additions across Los Angeles since 2010.
Brands We Service
Lodgewick ADU Los Angeles has hands-on experience with leading prefab and materials brands, and we match the right system to your lot, budget, and timeline. We build with James Hardie fiber cement siding on additions and ADUs across Los Angeles because it stands up to coastal moisture in Venice and the dry heat of the Valley. We install Abodu and Cover prefab ADU units, handling the site work, foundation, utilities, and finish details so the factory-built shell lands on a properly prepared lot.
We also work with Dvele’s high-performance panelized systems when homeowners want lower operating costs and tighter indoor air quality. Whether you have an existing Abodu unit that needs a room addition tied into it, a Cover ADU that needs finishing, or a Dvele shell that needs site work done right, we know the systems and the local requirements. If your addition involves any of these brands, or none of them, we can help.
Signs You Need a Pro Right Now
- Your foundation is settling and you want to add on. Adding square footage on a compromised foundation compounds the problem, and in Los Angeles, expansive soils and seismic activity make this worse. A pro should assess the slab or raised foundation before any addition is planned.
- Your lot is small and you’re out of room at ground level. If you’re in Koreatown or Palms on a 4,000-square-foot lot, going up instead of out may be the only legal path. A Home Addition Contractor in Culver City understands these density constraints and how to work within them structurally and by code.
- You’ve had a contractor walk off mid-project. Half-finished framing, open permits, missing inspections: this is more than an inconvenience. It’s a code liability. We assess what’s salvageable, what’s not, and we put the plan in writing before we touch it.
- Your garage is unused or underused. A garage conversion in Los Angeles can become a rental unit, a home office, or an in-law suite, and the city’s ADU rules have made this one of the highest-ROI additions available. If the garage is just storing boxes, it’s leaking value.
- You’re pricing a move and the numbers are ugly. Moving in Los Angeles means closing costs, higher property taxes, and a new commute. A room addition or Home Addition Contractor in Santa Monica can often deliver the extra space for less than the cost of relocating, and you keep the neighborhood you already know.
Our Process, Step by Step
- 1
Walk the property and talk numbers. We visit your Los Angeles property, measure the site, check access for equipment, and talk through what you actually need. You’ll get a written price based on real site conditions, not a vague range that changes later.
- 2
Written price and written guarantee, before work starts. You receive a written quote and The Kingswell Guarantee: price, arrival window, clean job site commitment, and the 365-Day Done Right Promise. No work begins until you’ve read and signed off on both.
- 3
Permits pulled, inspections scheduled. We handle the Los Angeles permitting process, schedule inspections, and meet the inspector on site. You don’t chase paperwork. Our team knows the building department rhythms in Los Angeles and Culver City well enough to keep the job moving.
- 4
Build with background-checked, uniformed crews. Every technician on your property is background-checked and uniformed. The site gets cleaned at the end of each day. You know who’s on your property and when they’ll be there.
- 5
Walkthrough and written wrap-up. We walk the finished addition with you, point out what was built and how it works, and hand you the written guarantee with the 365-Day Done Right Promise. If something isn’t right within the guarantee period, we come back and make it right, free.
How Much Does Home Addition Contractor Cost in Los Angeles?
A typical room addition in Los Angeles runs $150 to $350 per square foot, meaning a 400-square-foot family room addition lands between $60,000 and $140,000. Second story additions run higher, $250 to $450 per square foot, because of structural reinforcement, stair placement, and re-roofing. Sunroom additions run $40,000 to $95,000, bathroom additions $35,000 to $75,000, and bedroom additions $60,000 to $130,000. Garage conversions and additions range from $80,000 for an attached expansion to $220,000 for a full standalone ADU.
Several factors move the price: soil conditions on hillside lots in View Park-Windsor Hills, plumbing distances in older homes in Hancock Park, finish level, and whether the addition triggers seismic retrofits on the existing structure. The way to avoid overpaying is to get a line-item written quote before work starts and to make sure the price includes permits, engineering, and site protection, as outlined in our Home Addition Contractor Maintenance Checklist for Los Angeles Homeowners. Our free estimates cover all of that: site walk, real measurements, written price, and the guarantee in writing before you commit.
Our Service Area Near Los Angeles
Lodgewick ADU Los Angeles builds additions across the city and neighboring communities: West Los Angeles, Venice, Palms, Manhattan Beach, Lawndale, Koreatown, Hancock Park, View Park-Windsor Hills, and Century City. We also serve Home Addition Contractor in Culver City and Home Addition Contractor in Santa Monica with the same written-price commitment. Call (213) 698-7116 and a live person answers, 24 hours a day, 7 days a week, not a voicemail loop.
Serving Los Angeles, CA - Our Local Coverage Area
We’re based in the Los Angeles area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions About Home Addition Contractor in Los Angeles
Most room additions in Los Angeles take 3 to 6 months from permit to final inspection, with sunrooms and garage conversions running 2 to 4 months and second story additions running 5 to 9 months. The timeline depends on permit review speed, structural engineering, and whether you’re living in the house during the build. We set a defined arrival window for every crew and keep the job moving through inspections. Call (213) 698-7116 for a timeline specific to your project.
Home additions in Los Angeles typically run $150 to $450 per square foot, with most projects landing between $60,000 and $350,000 depending on scope, structural work, and finish level. Sunrooms run $40,000 to $95,000, bathrooms $35,000 to $75,000, and garage conversions $80,000 to $220,000. The price you’re quoted is the price you pay: we put it in writing before any work starts. Call (213) 698-7116 for an exact quote, estimates are free.
Yes, we have hands-on experience with Abodu, Cover, and Dvele systems, and we handle site work, foundations, utilities, and finish details for these prefab units in Los Angeles. We also build with James Hardie siding and can tie new additions into existing prefab structures. Whether your addition uses a prefab system or traditional stick framing, we handle the full scope. Call (213) 698-7116 to talk through your specific setup.
No, the written price you receive before work begins is the price you pay, with no change orders at the door. If we discover something during the build that requires a change, we document it and get your written approval before proceeding. The Kingswell Guarantee states this in writing on every project. Call (213) 698-7116 and we’ll walk you through how the fixed-price process works.
Yes, we pull all required permits for home additions in Los Angeles, schedule all inspections, and meet the inspector on site. Los Angeles has specific requirements for setbacks, lot coverage, egress, and seismic work on additions, and we handle the paperwork end to end. If you’ve been told you don’t need a permit, be careful: unpermitted additions create problems when you sell or refinance. Call (213) 698-7116 and we’ll tell you exactly what your project requires.
The 365-Day Done Right Promise covers the workmanship and materials on your home addition for a full year after completion. If the work isn’t done right, we come back and make it right, free, within the guarantee period. The promise is delivered in writing on every project before work begins, and the return visit is free. Call (213) 698-7116 and we’ll walk you through the full guarantee language.
Start by making a list of what you need the space to do, not just how big it should be: sleeping, working, entertaining, or renting. Collect your property survey if you have one, and note any HOA rules that may apply. We’ll handle the site walk, measurements, permits, and written price, and we’ll tell you what to expect during demo, framing, and finish. Call (213) 698-7116 and we’ll start with a free on-site estimate.
Schedule Your Home Addition Contractor Service in Los Angeles Today
If you’re ready to add space to your Los Angeles home without the guessing games, call (213) 698-7116 for a free, no-obligation estimate. You’ll get a written price, a defined arrival window, and the 365-Day Done Right Promise in writing before any work starts. Russ Delmar and the Lodgewick ADU Los Angeles team answer the phone live, 24/7.
Written by Russ Delmar, Owner at Lodgewick ADU Los Angeles, serving Los Angeles since 2010.
