We install and repair the critical underground infrastructure that keeps buildings safe and online—delivered fast, code-compliant, and inspection-ready.
Request a Same-Day EstimateTerraform Underground is a California A-licensed, fully insured underground utility contractor focused exclusively on fire protection and potable water work.
We handle everything below grade—planning, trenching, pipe, testing, and patch-back—so General Contractors and fire sprinkler companies can stay on schedule and pass inspection on the first visit.
Safety & Compliance
We own the trenching and groundwork so you can focus on the technical fit-out.
Expert engineering updates and field technicalities.
In the East Bay, soil shifting is reality. We're retrofitting aging systems with **Seismic Swing Joints** and flexural **PVC C900** to ensure fire suppression systems remain operational.
Failed **200 PSI / 2-hour hydrostatic tests** kill schedules. We breakdown why meticulous **Thrust Blocking** and proper air venting is the key to immediate sign-off.
Understanding **Double Check Detector Assemblies**. We cover pad specs, bypass meter sensitivity, and **UL/FM listed** theft protection for high-value components.
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811 tickets, submittals, equipment staging.
2
Safe excavation & precision DI/PVC piping.
3
Hydro tests & official AHJ walk-throughs.
4
Backfill & Asphalt/Concrete patch-back.
5
As-built photos & prompt close-out packet.
For the fastest estimate, please choose your preferred contact method below:
Please text or email the following information for a **same-day estimate**:
Text or Call:
(925) 595-1270Email Plans/Photos to:
terraformunderground@gmail.comMeticulous work and clean documentation mean no costly re-inspection delays.
We provide fast scheduling and clear, proactive progress updates throughout the project lifecycle.
Clear, phase-based invoicing protects your budget and margin on recurring underground work.
Northern & Central California
We provide comprehensive underground services across: