West Covina is a San Gabriel Valley suburb built out in the 1960s and 70s — tract homes on established streets, many still in the hands of the families who bought them decades ago. Those tract homes are now at the classic renovation age: kitchens and baths from the original build, plumbing systems that have served their full life, sewer laterals from the tract era, and HVAC equipment due for replacement. It’s one of the clearest examples of where a multi-trade contractor pays off — the kitchen remodel that needs a repipe, the bathroom update that reveals a failing drain line, the addition that needs the HVAC resized. One team holding all four licenses handles it as one project instead of three.
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, and C-20 HVAC (CSLB #1138550). One accountable team handles your construction, plumbing, drain and sewer work, and HVAC under a single contract.
Construction & Remodeling Services in West Covina, CA
Kitchen and bathroom remodels are our most common West Covina work, and they’re exactly where in-house plumbing matters. A tract kitchen remodel often involves moving the sink, adding a gas line for a new range, and replacing aging supply lines — with our C-36 license in-house, all of that is part of the same job. Bathroom remodels get the same treatment: new fixtures, new tile, and the drain and supply work done right before the finishes go in.
Many West Covina homeowners pair the visible remodel with infrastructure renewal. We perform full repipes, water heater replacements, and gas line work, and our drain and sewer services — camera inspection, hydro jetting, trenchless repair — address the tract-era laterals. Our sewer lining carries a 20-year warranty, and trenchless methods mean a failing lateral gets rehabilitated without tearing up the driveway or front yard.
Additions and ADUs serve the city’s growing and multigenerational households. We build room additions — bedrooms, expanded living areas — and ADUs through our sister brand ADU Cities, which has built more than 100 ADUs in four years. When an addition changes the home’s heating and cooling needs, our C-20 HVAC license means the system gets addressed as part of the same project. We also handle commercial tenant improvement for the businesses along the city’s corridors.
- Kitchen and bathroom remodels for 1960s–70s tract homes
- Repipes, water heaters, and gas lines
- Drain and sewer services: camera inspection, hydro jetting, trenchless repair, sewer lining (20-year warranty)
- Room additions for growing households
- ADUs — 100+ built in four years through ADU Cities
- HVAC installation, replacement, and repair
- Whole-home renovations
- Commercial and tenant improvement for local businesses
Why West Covina Property Owners Choose Mars
One accountable team is our model: A, B, C-36, and C-20 licenses in-house means the remodel, the repipe, and the HVAC are all performed by us under one contract. With 30+ years of hands-on experience, we’re licensed, bonded, and insured (CSLB #1138550), and we’re SB-PW and SB(Micro) certified. For a tract home that needs finishes and infrastructure together, one team owning the whole job is the efficient, honest way to do it. Our sister brands — 911 Drain Lines, ADU Cities, Get Your Roof Certified, and Universal Inspect — extend what a single call covers.
Proudly Serving West Covina and Los Angeles County
West Covina is in the eastern San Gabriel Valley in Los Angeles County, well within our service area. Our home base is at 1119 W. Collins Ave, Orange, CA 92867, and we serve the eastern SGV within roughly a 50-mile radius. Homeowners and businesses here 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 home, walk through the project with you, and provide a written estimate. In tract homes of this era, we check plumbing, sewer, and HVAC conditions so the estimate reflects the real scope of work.
Should I repipe if I’m already remodeling?
In many 1960s–70s homes, yes — it’s the most cost-effective time. Walls are already open, so renewing supply lines adds relatively little disruption versus doing it as a separate project later. We’ll assess your pipes and give you a straight recommendation.
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. We’ll evaluate your lot and discuss what fits.
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
From a tract kitchen remodel to a full repipe to an ADU, tell us what you’re planning 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.