Licensed and bonded underground construction company serving California. Utilities, septic, excavation. Every aspect from start to finish, so you don't have to manage handoffs.
Cal Underground is based in Waterford, CA, and runs underground construction across Stanislaus County and the wider Central Valley.
Headquartered in Waterford · Stanislaus County
Whatever lives under the dirt, from pipe and conduit to septic and drainage, we install it, repair it, and dig around it. General A licensed, CA Public Works certified, and 12 years on jobsites means there isn't much we haven't seen.
Installation and maintenance of water, sewer, storm drain, electrical, and telecommunications infrastructure, from new construction tie-ins to emergency repair.
Comprehensive septic installation, repair, and maintenance for residential and commercial sites. Permitting, design, and execution as one continuous workflow, built to pass inspection on the first walkthrough.
CA Public Works certified for prevailing-wage municipal and government projects. Permitting, compliance, inspections, and reporting. Every job, on the books, every time.
Site preparation done right the first time. Grading and excavation that meets engineering tolerances and stays on schedule. Clean cuts, accurate elevations, finished sites.
Anyone can hand you a quote. We hand you 12 years in the trade, a General A California license, a CLEAR record with the state license board, CA Public Works certification, and the bond and insurance to back every job we run.
Fully bonded and insured through American Contractors Indemnity and State Compensation Insurance Fund. Project security on every job.
From permitting and design to execution and signoff. No handoffs, no surprises, no finger-pointing between subs.
Job sites left clean and tidy. Dirt put back. Yard restored. Inspector walks once and signs off.
Hiring a utility contractor shouldn't feel like a gamble. Here's how the job actually runs from your first call to the moment we restore the dirt.
You ring, we answer, or we call back fast. Quick conversation to size up the job.
Free site visit. We look at the dirt, the access, the lines, the permits. You don't pay a dollar.
Written estimate with scope, materials, timing, and price. No fine print, no surprises.
You sign off, we lock the date, pull permits, and call DigAlert. Crew shows up on time.
Work runs clean. Inspector signs off. Dirt goes back. Your yard looks like we were never there.
Utilities, septic, dirt work, public works. Whatever you've got going underground, we'll take a look. On time, on budget, off your plate.
Fastest way to reach us is the phone. If you'd rather write it out, the form below goes straight to the team.
Licensed and bonded underground construction company based in Waterford, CA. Serving Stanislaus County and California's Central Valley. CSLB #969791 · General A · Public Works Certified.