Fullerton wears a lot of hats: historic downtown with buildings that have stood for a century, a Cal State campus that keeps the rental market humming, and neighborhoods ranging from 1920s vintage to brand-new infill. That variety means no two projects here look alike — a Craftsman repipe one week, a downtown commercial buildout the next.
A contractor with a single specialty cannot serve a city like this. Fullerton’s vintage homes need plumbers who understand old systems and remodelers who respect original character; its downtown needs a GC who can run a commercial tenant improvement without disrupting the businesses next door; its rental stock needs fast, durable turnarounds. Holding the A, B, C-36, and C-20 licenses lets one company say yes to all three — and be accountable for all of it.
Construction & Remodeling Services in Fullerton, CA
For Fullerton’s older homes, we do the unglamorous work that makes vintage houses livable for another fifty years: whole-home repipes, sewer lateral replacement, water heater and gas line upgrades, and HVAC systems that finally deliver even comfort through plaster walls and additions built in different decades. Our 911 Drain Lines crews camera first and dig only when necessary, with trenchless lining backed by a 20-year warranty.
On the commercial side, we build out and renovate space in and around the downtown core — offices, retail, and food service — coordinating plumbing, HVAC, and general construction under one contract so landlords and business owners deal with one accountable team. And for the neighborhoods near campus and the newer tracts alike, we remodel kitchens and baths, build additions, and design ADUs that add real long-term value to the property.
- Vintage-home repipes, sewer laterals, and system modernization
- Kitchen and bathroom remodeling, vintage to contemporary
- Sewer camera inspection, hydro jetting, trenchless repair — 20-year lining warranty
- HVAC installation, replacement, and repair (C-20 licensed)
- Commercial and downtown tenant improvement
- Room additions and ADUs
- Rental property turnarounds and repairs
Why Fullerton Property Owners Choose Mars
Most construction projects fall apart in the gaps between trades. The general contractor blames the plumber, the plumber blames the HVAC tech, and the homeowner is left playing referee. Mars Construction Industries Corp was built to eliminate that problem. We have been a licensed general contractor in Southern California backed by 30+ years of hands-on experience, and we hold four CSLB licenses in-house: A General Engineering, B General Building, C-36 Plumbing, and C-20 HVAC — CSLB #1138550.
That means one accountable team from the first walkthrough to the final punch list. When your project needs a repipe, a new sewer lateral, and an HVAC changeout in the same week, you make one call and we sequence all of it. No finger-pointing, no scheduling gaps, no “that’s not my trade.”
We are licensed, bonded, and insured, and we carry SB-PW and SB(Micro) small business certifications. Our family of brands — 911 Drain Lines for drain and sewer work, ADU Cities for accessory dwelling units, Get Your Roof Certified, and Universal Inspect for property inspections — means the same company you trust with your remodel can also camera your sewer line, build your ADU, or inspect a property before you buy it.
Proudly Serving Fullerton and Orange County
Fullerton is one of the Orange County communities we serve. Our home base is at 1119 W. Collins Ave in Orange, CA, and our crews work across Orange County and the surrounding region. Call us at 310.880.9718 to talk through your project.
Frequently Asked Questions
Are you a licensed contractor?
Yes. Mars Construction Industries Corp holds California CSLB license #1138550, covering A General Engineering, B General Building, C-36 Plumbing, and C-20 HVAC. We are licensed, bonded, and insured, and we hold SB-PW and SB(Micro) small business certifications.
How does the estimate process work?
It starts with a conversation about what you need. We walk the project, put together a clear written scope, and give you straightforward combined pricing — no buried markups, no vague allowances. Call 310.880.9718 or email brett@marsx.construction and we will set up a time to look at your project.
Which trades do you handle in-house?
General construction and remodeling, plumbing, drain and sewer, and HVAC — all under our own CSLB licenses, so one team is accountable for the whole job. If your project also needs electrical work, we coordinate it through licensed C-10 electrical subcontractors and manage them as part of your project.
Do you offer emergency service?
For drain and plumbing emergencies, our 911 Drain Lines team is available 24/7 at 714.746.7611 — camera inspections, hydro jetting, and sewer repairs, day or night.
Can you build an ADU on my property?
In many cases, yes. Through our sister brand ADU Cities, we have built more than 100 ADUs in the last four years, so we know how to evaluate a lot, design to the space, and build it right.
Do you take on commercial work?
Yes. We handle commercial and tenant improvement projects — office and retail buildouts, restaurant plumbing, and multi-trade renovations — with the same single-point accountability we bring to residential work.
Get a Straight Answer on Your Project
Whether it is a kitchen remodel, a sewer line that keeps backing up, an HVAC system that cannot keep up, or plans still on paper — talk to a contractor licensed to do the whole job. Call Mars Construction Industries Corp at 310.880.9718 or email brett@marsx.construction. One call, one accountable team, and a straight answer about what your project really needs.
Prefer email? Send your project details to brett@marsx.construction.