A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Lomita, CA
Lomita homeowners adding an ADU, home addition, or room addition are working with a very specific housing stock: mostly post-war single-family homes on flat, rectangular lots, many of them under 6,000 square feet. That means every project here is a game of inches – setback lines, lot coverage limits, and the distance between your house and the neighbor’s fence all decide what actually fits. We plan for that from the first conversation, with a written price before any work starts. Call us at (903) 568-7222 to talk through what your Lomita lot can hold.
Why Lomita Homes Are Different
Lomita sits on flat, dry land a few miles inland from the coast, which sounds easy until you start digging. The soil here runs sandy and stable in most of the city, but older homes built in the 1940s and 1950s often have foundations that were never engineered for an attached addition. That matters because a room addition or ADU that ties into the existing slab has to account for settlement, drainage, and the way the original structure was framed. Homes in the north end of Lomita, near Lomita Park and up toward the Torrance border, tend to be slightly newer with larger lots, while the center of town has the tightest setbacks. None of this is a dealbreaker. It just means the first thing we do is look at the lot, the foundation, and the property line – not a brochure.
Lomita also has a real mix of housing stock. There are single-story ranch homes, a surprising number of split-level builds from the 1960s, and pockets of newer two-story construction. A detached ADU in the backyard of a ranch home usually means a prefab panel system like Abodu or Cover, which keeps construction time short and disturbance low. A second-story addition on a split-level requires a different approach entirely – more structural work, more engineering, and a longer build. Our job is to translate your specific house, your specific lot, and your budget into a plan that Lomita’s building department will actually approve.
Our Main Lomita Services
Most Lomita homeowners come to us for one of three projects: a detached ADU in the backyard, a home addition that expands the existing footprint, or a room addition that converts or extends space within the current structure. Each has its own Lomita page with pricing, timelines, and the specifics of how the work gets done here.
ADU Builders in Lomita
ADUs are the most popular project we do in Lomita right now, and the reason is straightforward: with lot sizes averaging 5,000 to 6,500 square feet, many backyards have just enough room for a 500 to 800 square foot detached unit. Lomita follows California’s statewide ADU rules, which allow one ADU and one JADU – that’s a junior accessory dwelling unit, typically a converted garage or attached space – on most single-family lots. The big decision is prefab versus site-built. Prefab brands like Abodu and Cover shave weeks off the schedule and keep the construction mess to a minimum, which matters when your neighbors are ten feet away. Site-built gives you total design control but takes longer. Read the full breakdown on our ADU Builders in Lomita page.
Home Addition Contractor in Lomita
A home addition in Lomita usually means expanding the footprint of the house itself: a new family room, a larger kitchen, a ground-floor primary suite, or a second story over part of the existing structure. These projects trigger Lomita’s setback rules – that’s the legally required distance between a structure and the property line – and often require a survey before plans can be finalized. Because so many Lomita homes were built decades ago, we frequently find electrical panels that need upgrading and foundations that need reinforcement before the new square footage goes up. Troy Eastman handles the pre-construction review on every Lomita addition so you know what you’re getting into before you spend a dime. Details are here: Home Addition Contractor in Lomita.
Room Addition Contractor in Lomita
A room addition is the most contained version of the project: converting a garage into living space, enclosing a patio, adding a single bedroom or home office, or finishing an attic area over an existing room. In Lomita, garage conversions are particularly common because the mild climate means many homeowners never park inside, and converting that space is often the least expensive way to add 300 to 400 square feet. The catch is that Lomita requires the conversion to meet current building code for insulation, electrical, and emergency egress – which is just a fancy word for a second exit route in case of fire. We handle all of it. See Room Addition Contractor in Lomita for the full scope.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in Lomita
We build with and service prefab systems and materials from James Hardie, Abodu, Cover, and Dvele. When a Lomita project calls for prefab panels, we coordinate delivery and install directly with the manufacturer, which keeps the schedule predictable and the quality consistent. See our brands for the full rundown on what each system offers and where it works best.
Pricing for ADU Company in Lomita, CA
| Service | Typical range in Lomita |
|---|---|
| Detached ADU (prefab, 400 – 600 sq ft) | $180,000 – $260,000 |
| Detached ADU (site-built, 400 – 600 sq ft) | $220,000 – $320,000 |
| Garage conversion to JADU (300 – 400 sq ft) | $90,000 – $150,000 |
| Attached ADU (converting existing space) | $120,000 – $190,000 |
| Single-story home addition (300 – 500 sq ft) | $150,000 – $250,000 |
| Second-story addition (600 – 900 sq ft) | $280,000 – $420,000 |
| Room addition, single room (200 – 350 sq ft) | $90,000 – $160,000 |
| Garage conversion to living space | $70,000 – $120,000 |
| Kitchen expansion (150 – 250 sq ft bump-out) | $80,000 – $140,000 |
| Primary suite addition (400 – 500 sq ft) | $160,000 – $240,000 |
What pushes prices up in Lomita is usually one of three things: foundation reinforcement on older homes, lot coverage that forces a smaller footprint with more expensive vertical construction, or utility upgrades like a new electrical panel. What doesn’t change the price is us. The written price you get before work starts is the price you pay, and it’s stamped with our 365-Day Done Right Promise.
Neighborhoods We Serve in Lomita
We work across all of Lomita, and most of our jobs are within a 10- to 15-minute drive of each other, which keeps scheduling tight and response fast. The neighborhoods we’re in most often:
- Lomita Park and the northern border near Torrance
- The residential streets around Lomita Boulevard
- The area west of Eshelman Avenue toward Western Avenue
- South Lomita near 238th Street and the Palos Verdes Drive corridor
- The central Victorian-era streets between Narbonne Avenue and Pennsylvania Avenue
Service Area – Cities Near Lomita
While most of our Lomita work stays in town, we regularly take on projects in the surrounding South Bay cities. If you’re in Torrance, CA, Carson, CA, Lakewood, CA, or Rancho Palos Verdes, CA, the same written-price guarantee and 365-Day Done Right Promise apply. Dispatch and scheduling are coordinated from our Los Angeles office, and crews serve Lomita locally.
Serving Lomita, CA - Our Local Coverage Area
We’re based in the Lomita 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 ADU Company in Lomita
Most Lomita ADU projects move from first conversation to permit submission in four to eight weeks, depending on whether you choose a prefab system like Abodu or Cover or go site-built. The fastest route is usually a prefab garage conversion or a panelized detached unit. Call (903) 568-7222 and we’ll give you a realistic timeline for your specific lot, in writing.
Lomita follows California’s statewide ADU mandate, which streamlines approval for most single-family lots. You’ll still need a building permit, and depending on the project, a planning review for setbacks and lot coverage. We handle the paperwork, the drawings, and the inspections. Call (903) 568-7222 for a free estimate that includes the full permit path.
Every Lomita project comes with a 365-Day Done Right Promise in writing. If anything we built isn’t right within a full year, we come back and make it right. That’s on top of manufacturer warranties from brands like Dvele and James Hardie. If a covered repair fails, you get a free second visit.
Ready to see what your Lomita lot can hold? Call (903) 568-7222 for a free estimate and a written price before any work starts. Troy Eastman and the Benson ADU Builders team will walk you through the options and put everything in writing.
What happens when you call
- 1A real person answersNo phone trees - talk to a local adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Lomita Customers Say
"Booked a consult online and met the project manager two days later. Weekly progress updates arrived by text with photos. ADU finished on schedule."
- Hannah W."Clean, quiet crew. They respected the neighbors, kept noise to working hours, and swept the driveway every evening."
- Hope C."Communication was the best part. I always knew what was happening that week without having to ask."
- Dolly N.
