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
ADU work in Lomita, CA comes with a specific set of realities: compact lots, older single-story homes, and a city permit process that rewards homeowners who show up with complete plans. Most Lomita jobs we price fall between $180,000 and $320,000 for a detached unit before site work, though garage conversions and smaller additions land lower. We’re Sutton ADU Builders, and we work across Lomita with a written price locked in before any tool is lifted. Call (472) 248-8213 to talk through your lot.
Why Lomita Homes Are Different
Lomita’s housing stock skews small and mid-century, with a high share of homes built between the 1940s and 1970s. That matters for ADU work in a few practical ways. Older electrical panels often need an upgrade before a new unit can be permitted, and many lots have sewer lines that were sized for one modest house, not two dwellings. We factor those realities into the written price up front so you’re not surprised later.
The terrain is mostly flat, which helps keep site work straightforward compared to hillside builds in neighboring Rolling Hills or Rancho Palos Verdes. But Lomita’s lots are narrow in many pockets, especially north of Lomita Boulevard and around the Eshelman Avenue corridor. A setback, the required gap between your new structure and the property line, often ends up driving design decisions on these smaller parcels more than anything else. Some homeowners also live within HOA boundaries, particularly in the gated communities on the southern edge of town, and HOAs can add their own review layer on top of the city’s. We’ve worked through enough Lomita permit cycles to tell you honestly what will fly and what will stall.
Our Main Lomita Services
Most Lomita homeowners call us about one of three projects: a home addition, a new ADU, or a room addition. Here’s what each looks like on a Lomita lot.
Home Addition Contractor in Lomita
A home addition in Lomita usually means extending off the back or side of a mid-century home while keeping the original roofline clean. It’s a structural job tied into your existing foundation, and on Lomita’s older slabs that sometimes means a foundation inspection before we commit to a price. Permits here require structural drawings, and the city wants to see how the addition affects lot coverage. We handle that paperwork, and every customer gets a written number before work begins. Learn more about working with an Home Addition Contractor in Lomita.
ADU Builders in Lomita
Detached ADUs are a strong fit for Lomita’s flat, rectangular lots, but the real question is usually whether to go prefab or stick-built. Prefab lines like Abodu and Dvele can shorten construction time considerably, which matters when you’re living on-site through the build. Lomita’s setback rules and lot coverage limits shape what size unit fits, and we’ll tell you straight if a two-bedroom ADU is unrealistic on your parcel before you spend a dollar. Talk to our ADU Builders in Lomita team about a site walk.
Room Addition Contractor in Lomita
A room addition is the most common project we quote in Lomita, often a bedroom or family room off the back of a three-bedroom home that’s grown tight. These jobs tend to be less disruptive than a full ADU, but Lomita’s older electrical systems still need a close look. You’ll get a fixed, written price and a crew that’s been background-checked and photo-badged before they knock on your door. Details are on our Room Addition Contractor in Lomita page.
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 work directly with several ADU product lines homeowners ask about most in Lomita, including Abodu, Cover, and Dvele. Parts and panels are sourced through our local supply chain, and we also spec James Hardie cladding on custom builds. For a fuller look at what we service, see our brands.
Pricing for ADU Company in Lomita, CA
| Service | Typical range in Lomita |
|---|---|
| Detached ADU (studio – 1 bed) | $180,000 – $260,000 before site work |
| Detached ADU (2 bed) | $260,000 – $320,000 before site work |
| Garage conversion ADU | $120,000 – $180,000 |
| Home addition (single room) | $90,000 – $150,000 |
| Home addition (multi-room) | $150,000 – $280,000 |
| Room addition (bedroom/office) | $80,000 – $140,000 |
| Foundation upgrade on older slab | $8,000 – $25,000 |
| Electrical panel upgrade | $4,000 – $8,500 |
In Lomita, the two biggest price movers are lot size and the age of your existing utility lines. A house with a 60-amp panel and cast-iron sewer will cost more to prep than one already updated. Whatever the number is, you’ll see it in writing before anything starts, and the 365-Day Done Right Promise covers our workmanship for a full year after completion.
Neighborhoods We Serve in Lomita
Our crews work across the entire city, from the neighborhoods around Lomita Park up to the commercial stretch along Pacific Coast Highway. We’re typically able to schedule a site walk within a few business days anywhere in Lomita.
- Downtown Lomita near Narbonne Avenue
- Neighborhoods around Lomita Park and Eshelman Avenue
- Walnut Street corridor near City Hall
- Southern Lomita near Lomita Boulevard
- Areas bordering Harbor City and Torrance
Service Area – Cities Near Lomita
Beyond Lomita, we schedule projects in the surrounding South Bay communities. Homeowners in Torrance, CA and Carson, CA often have similar lot sizes and housing stock, while Lakewood, CA and Rancho Palos Verdes, CA jobs come with their own terrain and permit quirks.
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
Site walks usually happen within a few business days, and a written price follows shortly after. Permitting in Lomita typically takes several months depending on plan completeness. Call (472) 248-8213 to get on our Lomita schedule.
If your home sits within an HOA, you’ll likely need their sign-off in addition to city permits. Lomita’s municipal process doesn’t overrule HOA rules, so check your governing documents early. We can help you understand what the HOA will want to see.
Yes. We prepare and submit drawings to Lomita’s building department and manage any corrections they request. You’ll know the full scope and cost before we file anything. Call (472) 248-8213 for a free estimate on your project.
Ready to talk through your Lomita ADU, addition, or room build? Call (472) 248-8213 and you’ll reach a live person, not a voicemail tree. You’ll get a written price before any work starts, and every crew member who comes to your door will be background-checked, identity-verified, and photo-badged. That’s the Threshold Standard, and it applies to every job we do in Lomita.
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
"Every crew member was vetted and carried a badge, which matters when they are around your family for months. Tidy site every day."
- Daniel F."Itemized estimate with allowances laid out. Final cost was within a hair of the quote."
- Naomi R."Backyard ADU for my mother. The project manager showed ID and walked me through the permit steps, the foundation plan, and the schedule. Moved her in on time."
- Margaret C.
