San Dimas sits against the foothills with a historic downtown and a mix of older homes and newer hillside subdivisions. That mix shapes the work here: historic-area homes with aging plumbing and original layouts, and newer homes where the projects are additions, kitchen upgrades, and ADUs. Foothill heat also puts real demand on air conditioning, and many homes run HVAC systems that are undersized, aging, or both. When a project spans construction, plumbing, and HVAC — as San Dimas projects often do — a contractor holding all those licenses in-house keeps the job moving instead of stalling between trades.
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 San Dimas, CA
Our San Dimas work splits between updating older homes and improving newer ones. In the older housing stock, kitchen and bathroom remodels often go hand in hand with repipes, water heater replacements, and gas line work — all in-house trades for us, so the infrastructure and the finishes move as one project. In newer subdivisions, we focus on additions, kitchen upgrades, and ADUs that make good homes fit growing families.
ADUs are a strong fit for San Dimas lots. Through our sister brand ADU Cities, we’ve built more than 100 ADUs in four years — detached units, garage conversions, and additions configured as independent living space for family or long-term flexibility. We handle the project as a general contractor, coordinating every trade under one roof.
HVAC is a steady need in the foothills. We install, replace, and repair air conditioning and heating systems, and we can size a system properly when an addition or ADU changes the home’s load. Our drain and sewer services — camera inspection, hydro jetting, trenchless repair — come with a 20-year warranty on sewer lining, useful on hillside-adjacent lots where excavation is disruptive.
- Kitchen and bathroom remodels
- Room additions and whole-home renovations
- ADUs — 100+ built in four years through ADU Cities
- Repipes, water heaters, and gas lines
- HVAC installation, replacement, and repair
- Drain and sewer services: camera inspection, hydro jetting, trenchless repair, sewer lining (20-year warranty)
- Commercial and tenant improvement, including downtown-area businesses
Why San Dimas Property Owners Choose Mars
One accountable team is our model: A, B, C-36, and C-20 licenses in-house means construction, plumbing, sewer, and HVAC are all performed by us under one contract. 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. When a San Dimas project needs a wall moved, a gas line extended, and a new AC system, there’s no finger-pointing between contractors — there’s one team responsible. Our sister brands — 911 Drain Lines, ADU Cities, Get Your Roof Certified, and Universal Inspect — extend what a single call covers.
Proudly Serving San Dimas and Los Angeles County
San Dimas is in eastern Los Angeles County near the foothills, within our service area. Our home base is at 1119 W. Collins Ave, Orange, CA 92867, and we serve the eastern SGV and foothill communities within roughly a 50-mile radius. Homeowners and businesses here get the same licensed, multi-trade crew.
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 licensing on the CSLB website before hiring. Our license is CSLB #1138550 — A General Engineering, B General Building, C-36 Plumbing, and C-20 HVAC.
How does your estimate process work?
We come out, walk the project with you, and provide a written estimate. For projects that combine construction with plumbing or HVAC, we scope the whole job at once so you’re not collecting separate bids from separate trades.
Can you build an ADU on my property?
Often, yes. We’ve built more than 100 ADUs in four years through ADU Cities. We’ll evaluate your lot and discuss the options that fit — detached, attached, or garage conversion.
Do you do commercial work?
Yes. We handle commercial and tenant improvement for offices, retail, and restaurants — including build-outs in established commercial areas like a historic downtown.
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 foothill remodel to an ADU to a new HVAC system, 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.