Fast, Reliable Home Addition Contractor Across Commerce
Adding square footage to a Commerce home is a different job than most of LA County. Most residential lots here sit in small pockets surrounded by warehouses, rail spurs, and manufacturing. That industrial adjacency changes what a good addition needs, from air filtration to how we size the cooling load. Our crews know Commerce firsthand, and we answer the phone live at (254) 602-5618 whenever you want to talk through your project. A typical room addition in Commerce runs $28,000 – $85,000, and a garage conversion with a bathroom generally lands between $55,000 and $120,000 depending on what’s hiding inside those old walls.
Why Lodgewick ADU Builders Is Commerce’s Preferred Home Addition Contractor Company
We’ve worked on enough post-WWII stucco bungalows in Commerce to know what opening them up actually reveals. The 1940s and 1950s homes here were built tight and cheap, and the wiring, framing, and waterproofing usually show their age the moment a wall comes down. Our approach starts with a written price and a written scope before we touch anything, so you’re never handed a blank-check change order mid-demo.
Russ Delmar leads our crews, and he insists on something most addition contractors skip: we inspect first, write allowances into the contract, and price any surprise in writing before we do the work. That’s The Kingswell Way, and it’s why Commerce homeowners keep calling us back when they want to add a room, convert a garage, or bump out a kitchen. Every project gets our 365-Day Done Right Promise in writing. If it’s not right, we come back and make it right, free, within the guarantee period.
Garage Addition Contractors in Commerce
Garage Addition Contractors in Commerce deal with a specific problem: most garages here were never built to become living space. They have single-layer concrete slabs, no insulation, undersized headers, and electrical service that won’t pass a plan check. That’s the job. We convert the shell, upgrade the structure, insulate to code, run new electrical, and finish it as a real conditioned room or ADU.
What Opens Up in a Commerce Garage
Almost every garage conversion in Commerce turns up one of three things: a roof structure that wasn’t engineered for drywall weight, a slab without a moisture barrier, or a 100-amp panel that’s already maxed out. We price these as written allowances in the contract, so when the wall opens and the load path is resting on a single 2×4 header, you’re not getting a surprise invoice. You’re getting a line item you already approved.
Garage Additions Near the Freight Corridors
If your garage sits within a few hundred feet of Slauson, Bandini, or the rail yards near Washington Boulevard, we add sound attenuation and MERV-13 filtration to the plan. A garage conversion that fails to account for that will be noisy, dusty, and hard to keep cool, and an appraiser or lender may flag the air quality. We engineer for it from the start.
Bathroom Addition Contractor in Commerce
A Bathroom Addition Contractor in Commerce is really doing two jobs: adding the bathroom and fixing what the old house never had. Most Commerce bungalows have one bathroom on original cast-iron drain lines that are seventy years old. Adding a second bath or a primary suite bath means tying into those lines or running new vent stacks, and the permit triggers upgrades to the water heater and sometimes the gas line.
Wet-Wall Work on 1940s Plumbing
We’ve pulled walls on bathrooms throughout the residential pockets off Eastern Avenue and found galvanized supply lines so corroded they’d restrict flow to a trickle. When that’s the case, we price the re-pipe in writing before we cut the line. No blank checks, no “we’ll figure it out later.” The number is approved, then the work happens.
Bathroom Additions on Tight Commerce Lots
Many Commerce lots are small, and a bathroom addition often means bumping out four or five feet into the side yard or converting a back porch. Setbacks matter here more than in Montebello or Pico Rivera because the lot geometry is tighter. We check the zoning and set the addition where it actually fits, not where a generic floor plan says it should go.
Trusted Brands We Service in Commerce
We work with the brands that hold up in Commerce’s industrial climate, and we keep local parts availability in mind for every job. James Hardie siding is our default exterior on additions near active rail spurs and truck routes because it stands up to vibration and airborne dust better than vinyl. For prefab ADUs, we regularly spec Abodu and Cover units, and when a client wants a panelized approach, Dvele is a strong fit for Commerce’s small-lot constraints. We’ll walk you through what each brand costs, how long the lead time runs, and which one suits your specific lot and budget.
Common Home Addition Contractor Problems We See in Commerce Homes
- Undersized 100-amp panels that can’t carry the new load. Most Commerce bungalows were built with a 100-amp panel. Add a bathroom with a tankless heater or a garage conversion with a mini-split, and you’re over budget on electrical before the drywall goes up. We check this on day one and price the panel upgrade in the contract.
- Framing that was never meant to hold conditioned space. Once walls open, we often find load paths resting on headers that wouldn’t pass a modern plan check. On a 1940s stucco bungalow off Slauson, Russ Delmar’s crew found a kitchen wall load resting on a single 1960s 2×4 header. We priced the replacement in writing before tying in the new James Hardie addition.
- Cooling loads that a normal LA mini-split can’t handle. Commerce sits in a pronounced urban heat island, intensified by all the pavement and industrial roofs. A mini-split sized for Montebello will struggle here. We step up the tonnage and add MERV-13 filtration, because the unit often sits feet from a freight corridor.
- Plan-check rejections from industrial adjacency. If the permit drawings ignore the warehouse next door, plan check kicks the project back. Sound attenuation and ventilation have to be engineered in from the first submittal, or the addition stalls for weeks.
Pricing for Home Addition Contractor in Commerce, CA
Here are real numbers for Commerce’s market. A bump-out addition, like extending a kitchen or adding a small den, typically runs $28,000 – $55,000. A full room addition with foundation work lands between $45,000 and $85,000. Garage additions and conversions with a bathroom run $55,000 – $120,000, and a bathroom addition alone usually falls between $25,000 and $48,000. What shifts the number on a Commerce lot is what’s inside the walls: panel upgrades, re-pipes, header replacements, and filtration for industrial air. We write allowances for every one of those items into the contract so the price you approve is the price you pay. Call (254) 602-5618 for an exact quote. Estimates are free.
We Also Serve Cities Near Commerce
Our crews serve Commerce and the surrounding area, including Commerce neighborhoods near the 5 and 710 freeways, plus Los Angeles, Long Beach, Anaheim, and Riverside. If you’re in a nearby city and want to talk about a home addition, call us. We’ll tell you straight whether we’re the right fit for your job.
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 Home Addition Contractor in Commerce
Because Commerce’s housing stock is older and more industrially affected than the surrounding residential cities. Most homes here were built between 1940 and 1965, and their electrical panels, cast-iron plumbing, and framing were never meant to support an addition. Add to that the plan-check requirements driven by industrial adjacency, and the mid-project surprises stack up fast. That’s exactly why we inspect first and write allowances into the contract before demo starts. If you want a straight number on your Commerce lot, call (254) 602-5618 for a free estimate.
Yes, often. CalEnviroScreen ranks Commerce in the top pollution-burden percentiles statewide. Once we open a home’s walls for an addition near the freight and warehouse corridors, we routinely add MERV-13 filtration and pressure-test the existing envelope. That’s a step that’s essentially irrelevant in Montebello or Pico Rivera, but in Commerce it can be the difference between an addition that breathes and one that collects diesel particulate. Some lenders and tenants require it. We engineer it in from the start.
Commerce runs hotter than its residential neighbors because of all the pavement, roofing, and industrial activity. A mini-split sized by a standard LA County load calc will be undersized here, especially on a west-facing addition off Bandini or Washington. We step up the tonnage and factor in the heat-island load when we size the unit. If the addition faces a parking lot or a warehouse wall, that’s additional radiant heat the system has to overcome. We account for all of it in the written quote.
The permit inspection usually surfaces three things: the electrical panel is undersized, the framing doesn’t meet current code, and the plumbing needs to be brought up to code. On a garage addition, the slab and the roof structure are the big ones. On a bathroom addition, it’s the drain lines and the venting. We price each of those as a written allowance in the contract, so when the inspector flags it, you’re not hit with a change order. You already approved the line item.
Because two lots a block apart in Commerce can have completely different conditions. One sits on a quiet residential pocket, the other backs up to an active rail spur. One has a 200-amp panel, the other has an undersized 100-amp service. One has drain lines in good shape, the other has collapsed cast iron. A flat square-foot price ignores all of that and guarantees a change order later. We give you a written price based on what’s actually on your lot, after we look at it. Call (254) 602-5618 to schedule a free walkthrough.
Written by Russ Delmar, Owner at Lodgewick ADU Builders. We’re part of the Kingswell family of home-service companies, established in 2010, serving Commerce and the surrounding LA County area.