Los Angeles County is dozens of separate jurisdictions stacked side by side — the City of Los Angeles, county unincorporated areas, and independent cities like Long Beach, Pasadena, and Torrance, each with its own specs, permits, and inspection habits. Our crews handle that patchwork every day: sewer and water main replacements in older neighborhoods, storm drain work, and street restoration that has to satisfy the city that owns the street. We serve Long Beach, Los Angeles, Pomona, Pasadena, Torrance, Downey, Whittier, Burbank, Glendale, and El Monte, and we price LA County work for general contractors, agencies, and private owners.
Civil & Underground Services in Los Angeles County
One Class A contractor for the whole underground scope — self-performed by our own crews, from open cut to final restoration.
- Underground Utilities — Complete wet and dry utility installation — pipe, vaults, and conduit — from trench to tie-in.
- Sewer & Water Mains — New mains, replacements, and tie-ins built to agency spec and pressure-tested before backfill.
- Storm Drain — Storm drain pipe, structures, and catch basins that move water where it belongs.
- Trenching & Excavation — Safe, shored, traffic-controlled excavation by our own operators and our own iron.
- Slurry Backfill & Flowable Fill — Flowable fill (CLSM) that self-compacts to spec — no compaction testing, streets reopen sooner.
- Concrete & Street Restoration — Trench paving, curb, gutter, and sidewalk restored to spec after the underground work.
- Grading & Paving — Rough and finish grading, base, and asphalt paving for streets, lots, and utility corridors.
Part of our eight-county Southern California service area — see all locations we serve.
Public Works in Los Angeles County
Mars Civil bids both public and private work in Los Angeles County. We are set up for public works the way agencies require it — prevailing-wage crews, certified payroll, and complete bid packages turned around on deadline. Working across LA County means working to many different agency standards on the same week — our bid packages and field paperwork are built for exactly that.
Mars Civil is a division of Mars Construction Industries Corp — CSLB License #1138550 (A – General Engineering), SB-PW and SB(Micro) certified, Small Business Certification ID 2046756. Our small business certification also helps agencies and prime contractors meet participation goals on public work.
Frequently Asked Questions
Which Los Angeles County cities does Mars Civil serve?
We work across the county, including Long Beach, Los Angeles, Pomona, Pasadena, Torrance, Downey, Whittier, Burbank, Glendale, and El Monte. Every city has its own specs and permit process for street work — we build those requirements into the bid from day one.
Do you self-perform, or broker work out to other contractors?
We self-perform. Trenching, pipe, backfill, and restoration are done by Mars Civil crews running Mars Civil equipment — one accountable contractor for the underground scope, not a chain of subs to chase.
Can Mars Civil handle prevailing-wage public works in LA County?
Yes. We’re set up for public works — prevailing wage, certified payroll, and agency documentation — and we’re SB-PW and SB(Micro) certified, Small Business Certification ID 2046756. That certification helps agencies and prime GCs meet small business participation goals.
How do I get a bid for a Los Angeles County job?
Send the plans through our Request a Bid page or call 714.746.7611 with the scope and your bid date. We review the set, price it, and send back a complete number — and if we can’t hit your deadline, we tell you up front.
Have plans? Get a number.
Bid requests, plan sets, and project questions — send them over and we’ll respond fast.