Whittier is a historic city with deep roots — founded by Quakers, anchored by a walkable Uptown district, and home to a housing stock that spans from early-20th-century homes to mid-century tracts to newer infill. That range defines the work here: historic-area homes with aging plumbing and original layouts, mid-century houses ready for kitchen and bath remodels, and small businesses in Uptown’s older commercial buildings needing practical tenant improvements. Across all of it, the pattern holds — construction plus plumbing, remodeling plus HVAC — and a contractor holding all those licenses in-house keeps the project under one roof.
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 Whittier, CA
Our Whittier residential work covers the city’s housing range. In the historic neighborhoods, we renovate with character in mind — renewing infrastructure while respecting original detail — and we perform repipes, water heater replacements, and gas line work in-house under our C-36 license. In the mid-century tracts, we focus on kitchen and bathroom remodels: new layouts, modern plumbing, and finishes that bring these homes current. Pairing a remodel with a repipe means walls open once, not twice.
Sewer and drain work is a regular need in a city with this much older housing. We provide camera inspection for accurate diagnosis, hydro jetting to clear lines, and trenchless sewer repair that rehabilitates a failing lateral without tearing up established landscaping. Our sewer lining carries a 20-year warranty — real protection for a homeowner facing a sewer problem.
We install, replace, and repair HVAC systems for homes of every era, and we build room additions and ADUs for growing and multigenerational households — through our sister brand ADU Cities, we’ve built more than 100 ADUs in four years. For Uptown and the city’s commercial corridors, we handle tenant improvement: build-outs and renovations for retail, restaurant, and office spaces in older commercial buildings, including the plumbing and HVAC upgrades those buildings typically need.
- Kitchen and bathroom remodels, historic and mid-century homes
- Repipes, water heaters, and gas lines
- Drain and sewer services: camera inspection, hydro jetting, trenchless repair, sewer lining (20-year warranty)
- HVAC installation, replacement, and repair
- Room additions and whole-home renovations
- ADUs — 100+ built in four years through ADU Cities
- Commercial and tenant improvement for Uptown and corridor businesses
Why Whittier Property Owners Choose Mars
One accountable team is our model: A, B, C-36, and C-20 licenses in-house means your project’s construction, plumbing, sewer, and 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. Whether it’s a historic home’s renovation, a tract kitchen remodel, or an Uptown build-out, one team owns the result. Our sister brands — 911 Drain Lines, ADU Cities, Get Your Roof Certified, and Universal Inspect — extend what a single call covers.
Proudly Serving Whittier and Los Angeles County
Whittier is in southeastern Los Angeles County, well within our service area. Our home base is at 1119 W. Collins Ave, Orange, CA 92867, and we serve the area 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 property, walk through the project with you, and provide a written estimate. In older homes, we assess plumbing, sewer, and HVAC conditions so the estimate reflects the real scope of work.
Can you renovate a historic home without ruining its character?
Yes. Infrastructure work happens behind walls and in mechanical spaces; visible finishes are handled with the home’s character in mind. One team doing both keeps the result coherent.
Do you do commercial work?
Yes. We handle tenant improvement for retail, restaurant, and office spaces — including older commercial buildings that need plumbing and HVAC upgrades as part of the build-out.
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
Historic home, tract remodel, or commercial build-out — 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.