A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateWhat Does a Home Addition Cost in West Los Angeles?
A home addition in West Los Angeles typically runs $280 – $420 per square foot depending on foundation work, roof tie-ins, and whether you’re adding a full bathroom or second story. A modest 400 sq ft room addition usually lands between $112,000 and $168,000, while a 1,000 sq ft second-story addition often falls in the $280,000 – $420,000 range. These numbers reflect West Los Angeles permitting, structural upgrades to 1920s – 1950s framing, and the sewer and electrical retrofits this housing stock almost always needs. Call (213) 698-7116 for a written line-item quote on your specific lot.
Fast, Reliable Home Addition Contractor Across West Los Angeles
If you live in West Los Angeles between the 10 and Sawtelle Boulevard, you already know the tradeoff: flat rectangular lots, charming pre-war homes, and almost no extra space inside. That’s exactly why so many West LA homeowners are adding square footage rather than moving. Our crews work these neighborhoods weekly, from Rancho Park up through Westdale and over to the Cheviot Hills border. We know which 1920s sewer laterals fail, which rear garages sit too close to the property line, and which Spanish Colonial Revival rooflines can carry a second story. You get a straight answer and a written price before any framing starts. Call (213) 698-7116 to talk through your lot.
Why West Los Angeles Homeowners Choose Lodgewick ADU Los Angeles
We operate as part of the Kingswell family of home-service companies, founded in 2010. The Home Addition Contractor team at Lodgewick ADU Los Angeles carries a specific promise to West Los Angeles homeowners: a written price first, a defined arrival window, a clean job site, and a written guarantee on every project. Under The Kingswell Guarantee, if something isn’t right within 365 days, we come back and make it right. No charge. Russ Delmar leads the crew, and every technician on your property is background-checked and uniformed. A live person answers our phones 24/7, not a voicemail loop.
West Los Angeles clients consistently tell us the same thing: they’d been burned by a contractor who changed the price at the door or never came back. The 365-Day Done Right Promise changes that. It’s a written guarantee on every build and every renovation, and it covers the work for a full year. If a door binds, a seam opens, or a fixture fails, we return free.
We also know the local prefab landscape. For ADU additions in West Los Angeles, we frequently recommend Cover, Dvele, and Mighty Buildings systems because their panelized wall assemblies handle marine-layer moisture better than conventional stick framing on tight rear lots. These are not one-size-fits-all picks. We match the system to your lot, your setback constraints, and your budget.
Garage Addition Contractors in West Los Angeles
Garage Addition Contractors in West Los Angeles know the first question is never “what will it look like?” It’s “how close is the garage to the rear property line?” Many West LA garages from the 1940s and 1950s sit 18 to 36 inches off the back fence, which means a straight conversion triggers a variance or a redesign that respects current setback rules. A garage addition or conversion here usually runs $180,000 – $260,000 for a full one-bedroom unit with a bath and kitchenette, including panel and sewer work.
Detached Garage to ADU Conversion
The original garage becomes the shell, and we reframe the interior, cut new window openings, insulate against morning marine layer dampness, and run new electrical. On a 1950s detached garage near Sawtelle, we replaced a 60-amp fuse panel with a 200-amp service before pulling a single wire.
Garage Expansion Without a Variance
If your garage sits within the required setback, we can often add a bump-out or extend the roofline without a hearing. That keeps the project moving on a normal permit timeline rather than a six-month variance process.
Bathroom Addition Contractor in West Los Angeles
A Bathroom Addition Contractor in West Los Angeles has to answer a question most general contractors in newer developments never hear: “Is your 1920s clay sewer lateral going to handle another toilet?” Many original laterals in West LA are cracked or undersized, and adding a bathroom without checking the line leads to sewage backing up into a brand-new addition. A full bathroom addition here typically runs $45,000 – $75,000, more if we have to replace the lateral or upsize the main line under the slab.
The Sewer Lateral Reality
Before we frame a single wall, we camera the lateral. On a Minimal Traditional home near the Sawtelle border we found clay pipe with root intrusion at every joint. We replaced it before the addition, which saved the homeowner from tearing out new tile six months later.
Adding a Bath Without a Full Re-Pipe
In some West LA homes, we can tie into an existing cast-iron stack and add a bath near the main drain without trenching the whole yard. This lowers cost and keeps the construction window shorter.
Trusted Brands We Service in West Los Angeles
For West Los Angeles additions, we spec and install systems from Cover, Dvele, and Boxabl where the design and lot make sense. Cover’s panelized build suits rear-lot ADUs with tight crane access. Dvele’s high-performance envelopes perform well against marine-layer moisture and Santa Ana wind pressure. Boxabl units work when you need a compact studio fast. Our crews stock trim, flashing, and connection parts for these systems locally, so West Los Angeles clients don’t wait on a long supply chain when a detail needs adjusting mid-build. We keep the Kingswell guarantee on every brand we install.
Common Home Addition Contractor Problems We See in West Los Angeles Homes
- Undersized clay sewer laterals from the 1920s and 1930s. Many original lines were sized for a single bathroom and a kitchen sink. Adding a bathroom or laundry overloads them, and the first heavy rain exposes the problem.
- Rear garages that sit too close to the back property line. Current rear-yard setback rules don’t grandfather old structures, so a straight conversion often needs a variance or a shifted design. We handle that conversation before you spend money on plans.
- Marine-layer moisture in flat-roof or single-pane additions. West Los Angeles mornings are damp, and an unventilated addition grows mold by the first winter. We detail exterior insulation, vapor barriers, and ventilation from the start.
- 60-amp fuse panels that cannot carry a new room or ADU. Most 1940s and 1950s West LA homes need a 200-amp service upgrade before any real addition. We include that in the written quote so there’s no surprise.
Pricing for Home Addition Contractor in West Los Angeles, CA
| Addition Type | Typical West Los Angeles Range |
|---|---|
| Room addition (400 sq ft) | $112,000 – $168,000 |
| Second-story addition (1,000 sq ft) | $280,000 – $420,000 |
| Bathroom addition | $45,000 – $75,000 |
| Garage ADU conversion | $180,000 – $260,000 |
| Bump-out addition (150 – 250 sq ft) | $42,000 – $87,500 |
Your final number depends on panel capacity, sewer line condition, foundation type, and whether you need a variance for the rear setback. We give you a written price before any work begins, and that number doesn’t change at the door. Call (213) 698-7116 to schedule a free estimate.
We Also Serve Cities Near West Los Angeles
Our crews work throughout the Westside and central Los Angeles. Along with West Los Angeles, we serve West Los Angeles neighbors in Los Angeles, Culver City, Santa Monica, and Venice. If you’re a few blocks over the city line, the same written pricing and 365-Day Done Right Promise apply.
Serving West Los Angeles, CA - Our Local Coverage Area
We’re based in the West 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.
FAQs About Home Addition Contractor in West Los Angeles
Yes, but it depends on your foundation, roofline, and the original framing. Many Spanish Colonial Revival homes in West Los Angeles were built on raised foundations with 2×4 stud walls, so a second story usually requires a structural upgrade to beams and footings. A full second-story addition on a 1940s home in West LA typically runs $280,000 – $420,000 including the structural work. Call (213) 698-7116 and we’ll walk your specific house.
In most residential zones, West Los Angeles does not require a new ADU to match the main house’s Spanish Colonial Revival or Minimal Traditional details, but the Planning Department does review rooflines, height, and street-facing elevations. Many homeowners choose to match stucco texture and window proportions anyway, and we can quote both approaches. The city reads massing and roof form more strictly than ornament. Call us for what your specific street requires.
You start by camera-ing the sewer lateral to see what you’re working with. If the line is sound and you can tie into an existing cast-iron stack near the main drain, a bathroom addition often stays in the $45,000 – $60,000 range. If the clay lateral is cracked or root-intruded, you’re looking at a replacement cost that pushes the project higher. We scope the line before writing the price. Call (213) 698-7116.
The Bonus ADU ordinance is a city program that lets you add an extra accessory dwelling unit beyond the normal limit if you rent at least one unit to a low-income tenant. For a garage conversion in West Los Angeles, this affects design choices like a separate entrance, separate utility metering, and sometimes a larger allowed unit. It’s a good way to make a rear-lot garage conversion pencil out financially, but it comes with affordability restrictions. We’ll explain the tradeoffs before you commit.
Probably not without a variance, because current West Los Angeles rear-yard setback rules don’t grandfather nonconforming structures. You have two practical options: apply for a variance, which adds time and uncertainty, or redesign the conversion to keep the structural walls where they are and gain space inward. On one rear-lot garage off Sawtelle, we kept the original back wall and opened the front toward the house, which met setback rules without a hearing. Call (213) 698-7116 to find out which path fits your garage.
Get Your West Los Angeles Home Addition Started
We serve West Los Angeles from Rancho Park to Westdale to the Cheviot Hills line, and we bring The Kingswell Way to every job: the price before the work, the crew at the time we gave you, the site cleaner than we found it, and the guarantee in writing. If you’re planning a room addition, garage conversion, or bathroom addition in West Los Angeles, call (213) 698-7116 for a free estimate. Russ Delmar and the Lodgewick ADU Los Angeles team will give you a straight number and a written plan.
Written by Russ Delmar, Owner at Lodgewick ADU Los Angeles, serving West Los Angeles since 2010.
