A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Commerce, CA
Adding an ADU or home addition in Commerce, CA usually costs between $180,000 and $420,000 depending on whether you choose a prefab unit, a garage conversion, or a ground-up site build. Benson ADU Builders gives you a written price before any work starts, so you know the number before you commit. Commerce homes sit on flat, compact lots near the 5 and 710 freeways, which shapes how we design setbacks, access, and utility runs. Call us at (903) 568-7222 for a free estimate on your Commerce project.
Why Commerce Homes Are Different
Commerce is a dense, industrial-adjacent city where residential streets sit surprisingly close to warehouses, rail lines, and truck routes. That means three things matter more here than in most LA County cities: soil conditions, noise control, and parking access during construction. Many Commerce lots were built out in the 1940s and 1950s, so we regularly work with older foundations, narrow side yards, and rear property lines that bump up against commercial parcels. Setbacks in Commerce are strict in the R-1 zones near Bandini Boulevard and the neighborhoods around Commerce Way, and a good portion of backyard space is often taken by an existing detached garage that’s a prime candidate for conversion. We also see a lot of homes where the electrical panel needs an upgrade before an ADU can be permitted. Our team handles that as part of the written scope, so you’re not surprised by a change order later. The combination of flat terrain and older housing stock makes Commerce a good candidate for prefab panels, which keep on-site time short on tight streets.
Our Main Commerce Services
Commerce homeowners typically call us about two things: building a new ADU in the backyard, or expanding the footprint of the house itself. Here’s how each one works here.
ADU Builders in Commerce
An ADU in Commerce gives you a legal second unit you can rent out or use for family. We build detached backyard units, garage conversions, and JADUs – that’s a junior ADU, usually carved out of an existing bedroom with its own entrance and small kitchen. On Commerce lots, garage conversions are the most common starting point because the structure already exists and the foundation work is minimal. We also build ground-up detached units with prefab kits from Cover and Dvele, which means less time with crews on your street and fewer material deliveries blocking your driveway. Learn more about how we approach ADU Builders in Commerce.
Home Addition Contractor in Commerce
A home addition in Commerce means extending your existing footprint, usually out the back or into a side yard that’s sitting unused. We’ve added primary suites, expanded kitchens, and built family rooms on lots where the house already sits close to the property line. Because many Commerce homes share walls or sit on narrow lots, we pay close attention to light, air, and privacy setbacks when we draw the plans. Every addition here starts with a written price and a clear scope, so you know exactly what’s included before we pull permits. See how we handle Home Addition Contractor in Commerce.
Room Addition Contractor in Commerce
A single room addition in Commerce is a faster, more contained project than a full home addition, and it’s often the right move when you need one more bedroom, a home office, or a laundry room without reworking the whole house. These jobs typically take a few months and involve foundation work, framing, roofing, electrical, and finish work. On older Commerce homes, we sometimes uncover unpermitted past work, and we handle that correction as part of the scope rather than surprising you mid-project. Details on our approach are on the Room Addition Contractor in Commerce 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 Commerce
We’re authorized to build with several national prefab and materials brands, which gives Commerce homeowners options instead of a single take-it-or-leave-it product. We regularly work with Dvele, Boxabl, and James Hardie cladding, and our Commerce clients often ask about those names by the time they call us. For a closer look at what each brand offers, see our brands.
Pricing for ADU Company in Commerce, CA
Here are the ranges we typically quote in Commerce. These are ballpark figures; your written estimate will be exact.
| Service | Typical range in Commerce |
|---|---|
| Detached ADU (prefab) | $180,000 – $320,000 |
| Detached ADU (site-built) | $280,000 – $420,000 |
| Garage conversion ADU | $120,000 – $200,000 |
| JADU (junior ADU) | $90,000 – $160,000 |
| Home addition (full size) | $180,000 – $400,000 |
| Room addition (single) | $80,000 – $180,000 |
| Foundation work (add-on) | $15,000 – $45,000 |
| Electrical panel upgrade | $3,500 – $7,500 |
| Permit fees (Commerce) | $5,000 – $15,000 |
| Site prep and grading | $8,000 – $25,000 |
In Commerce, prices tend to rise when the lot is tight to access, the soil needs compaction work, or the existing electrical service is too old for the added load. Whatever the final number is, it’s written down before we start. No verbal estimates that drift.
Neighborhoods We Serve in Commerce
We work across all of Commerce, from the older residential pockets near the 710 to the streets east of the 5. Typical response time for an estimate visit anywhere in Commerce is within a few business days, depending on our schedule.
- Bandini Boulevard area
- Commerce Way corridor
- Eastern Avenue neighborhoods
- Eastern Commerce
- Gateway area near the Citadel outlets
Service Area – Cities Near Commerce
Benson ADU Builders also serves the broader LA and Orange County region. If you’re just outside Commerce, we work in Los Angeles, CA, Long Beach, CA, Anaheim, CA, and Riverside, CA. Dispatch and scheduling are coordinated from the brand’s Los Angeles office, and crews serve Commerce locally.
Serving Commerce, CA - Our Local Coverage Area
We’re based in the Commerce 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 Commerce
In most cases, we can have someone out to your Commerce property within a few business days to look at the lot, talk through your goals, and put together a written estimate. You’ll have a real dollar figure to work with, not a vague range.
Most single-family homes in Commerce are not in HOAs, but if your neighborhood has one, we’ll help you understand what it requires. California law limits how much an HOA can restrict ADUs, and we handle the paperwork as part of your project scope.
No. The price we give you in writing before work starts is the price you pay, unless you decide to change the scope yourself. We don’t bill change orders for conditions we should have caught during the estimate. That’s the whole point of a written price.
Ready to talk numbers? Call Benson ADU Builders at (903) 568-7222 to schedule a free estimate on your Commerce ADU, home addition, or room addition. Written price first, always.
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 Commerce 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.
