Los Angeles is not one market — it’s dozens. Hillside modern homes above the canyons, Craftsman bungalows in the historic neighborhoods, mid-century tracts in the Valley, dense condo and apartment buildings from downtown to the Westside, and commercial corridors that never stop turning over. A contractor working across this city needs genuine range: the licenses to handle a hillside addition, the experience to navigate a condo HOA, the plumbing depth for a 1920s repipe, and the commercial capability for a restaurant or office build-out. Most contractors specialize in one slice. Mars covers the whole picture — four trades in-house instead of one.
Mars Construction Industries Corp is a multi-trade general contractor based in Orange, CA, operating with 30+ years of hands-on experience. We hold four CSLB licenses in-house: A General Engineering, B General Building, C-36 Plumbing, C-20 HVAC (CSLB #1138550). One accountable team handles your construction, plumbing, drain and sewer work, and HVAC under a single contract — whether your project is a Valley kitchen remodel, a hillside addition, a condo bath, or a commercial TI.
Construction & Remodeling Services in Los Angeles, CA
Our residential work spans LA’s housing spectrum. In the older neighborhoods — the bungalow belts, the pre-war districts — we renovate with character in mind while renewing what’s behind the walls: full repipes, water heater replacements, gas line work, and sewer lateral rehabilitation, all in-house. Kitchen and bathroom remodels in these homes pair new finishes with new infrastructure, so walls open once. In the Valley’s mid-century tracts and newer areas, we focus on kitchen and bath renovations, room additions, and whole-home updates.
Hillside properties get dedicated attention: additions and renovations engineered for graded lots, where our A General Engineering license and in-house mechanical trades keep complex work under one contract. Our drain and sewer services — camera inspection, hydro jetting, trenchless repair — carry a 20-year warranty on sewer lining, and trenchless methods are especially valuable on hillside lots where excavation is disruptive.
For the city’s dense housing — condos, townhomes, apartment buildings — we handle unit remodels coordinated with HOA and building management requirements, plus building-level plumbing infrastructure: repipes, water heaters, and gas lines for multi-unit properties. ADUs are a major part of our LA work; through our sister brand ADU Cities, we’ve built more than 100 ADUs in four years.
Commercially, Los Angeles is a tenant improvement town. We handle office build-outs, retail and restaurant TI, and renovations of commercial buildings — with C-36 plumbing and C-20 HVAC in-house, so restroom build-outs, plumbing rough-in, and commercial HVAC stay inside one contract. We install, replace, and repair HVAC systems for homes and businesses alike, including equipment worn by coastal salt air on the Westside.
- Kitchen and bathroom remodels across LA’s neighborhoods
- Historic and bungalow renovations with infrastructure renewal
- Room additions and whole-home renovations, including hillside properties
- Repipes, water heaters, and gas lines — single-family and multi-unit buildings
- Drain and sewer services: camera inspection, hydro jetting, trenchless repair, sewer lining (20-year warranty)
- HVAC installation, replacement, and repair — residential and commercial
- Condo and apartment remodels, coordinated with HOA and building management
- ADUs — 100+ built in four years through ADU Cities
- Commercial tenant improvement: office, retail, and restaurant build-outs
Why Los Angeles Property Owners Choose Mars
One accountable team is our model, and Los Angeles is where it proves itself daily. Four licenses in-house — A, B, C-36, C-20 — means a hillside addition’s engineering, a bungalow’s repipe, a condo’s remodel, and a restaurant’s TI can all be handled by us, each under one contract with one team responsible. We’ve been operating with 30+ years of hands-on experience, we’re licensed, bonded, and insured (CSLB #1138550), and we’re SB-PW and SB(Micro) certified. In a city where every project crosses trade lines and logistical layers, one team owning the whole job is what gets projects finished well. Our sister brands — 911 Drain Lines, ADU Cities, Get Your Roof Certified, and Universal Inspect — extend what a single call covers.
Proudly Serving Los Angeles and Los Angeles County
Los Angeles is the heart of Los Angeles County and the center of our service area. Our home base is at 1119 W. Collins Ave, Orange, CA 92867, and we serve the city’s neighborhoods — from the Valley to the Westside, downtown, and the harbor area — within roughly a 50-mile radius. Homes, HOAs, and businesses across LA get the same licensed, multi-trade team.
Frequently Asked Questions
Do I need a licensed contractor for my project?
In California, any construction project totaling $1,000 or more in labor and materials must be performed by a licensed contractor. Verify any license on the CSLB website before hiring. Ours is CSLB #1138550 — A General Engineering, B General Building, C-36 Plumbing, and C-20 HVAC.
How does your estimate process work?
We visit the property, walk through the project with you, and provide a written estimate. For multi-trade projects — and in LA, most are — we scope construction, plumbing, drain, and HVAC together so you’re dealing with one number and one team.
Can you handle a hillside addition?
Yes. Our A General Engineering license covers the structural and site-adjacent aspects, and our in-house plumbing and HVAC trades handle the mechanical side — one coordinated project under one contract.
Do you work with HOAs and building management?
Yes. We’re experienced with condo and apartment projects: approvals, insurance certificates, restricted hours, elevator scheduling, and common-area protection.
Can you build an ADU on my lot?
Often, yes. We’ve built more than 100 ADUs in four years through our sister brand ADU Cities, across many LA lot types. We’ll evaluate your property and discuss the options.
Do you handle plumbing or sewer emergencies?
Yes. Our sister brand 911 Drain Lines provides 24/7 drain and plumbing emergency service at 714.746.7611.
Get a Straight Answer on Your Project
Whatever the project — remodel, addition, repipe, ADU, or commercial build-out — tell us what you need and we’ll give you a straight answer. Call 310.880.9718 or email brett@marsx.construction. One accountable team, four licenses in-house, operating with 30+ years of hands-on experience.