Slab Leak Detection in California
A slab leak is a leak in a water line under a concrete floor. It's fixed one of three ways: a spot repair through the slab, rerouting the line through walls or the attic, or repiping the affected section.
Coverage in California
Covered ZIP codes
1,473
Cities and towns
917
Most-covered
Los Angeles, San Diego, San Francisco
What drives slab leak detection calls in California
Dry season: Long dry months shrink some soils, and irrigation systems, backflow devices and outdoor lines get heavy use.
Pre-war homes in Los Angeles, San Francisco and Oakland often have galvanized supply lines and cast-iron or clay drains. Slab-on-grade construction is common in Southern California and the Central Valley, while raised foundations are typical in older coastal neighborhoods.
Hiring for slab leak detection in California
Plumbing contractors in California must hold a Contractors State License Board (CSLB) license with the C-36 Plumbing classification for most work over the small-job threshold. Look up the license number on the CSLB site before hiring. Local building departments issue permits and inspect the work.
SteadWell is a free referral service, not a plumbing company. Calls to (833) 753-0180 are routed by ZIP code to independent, licensed plumbers; our California coverage list includes 1,473 ZIP codes. Ask for the trip fee and total price before work starts.
About slab leak detection
- A warm spot on a tile or concrete floor
- Water meter moves with everything off
- Sound of running water with no fixtures on
- Damp carpet or cupped wood flooring
- Unexplained jump in the water bill
The full guide covers the visit and cost factors: Slab Leak Detection & Repair.
Slab Leak Detection in California: questions
How do I check a plumber's license in California?
Plumbing contractors in California must hold a Contractors State License Board (CSLB) license with the C-36 Plumbing classification for most work over the small-job threshold. Look up the license number on the CSLB site before hiring. Local building departments issue permits and inspect the work.
Is slab leak detection available in Los Angeles?
Los Angeles is among the most-covered cities in our California call-routing list. Calls are connected by ZIP code to an independent, licensed plumber who serves it; if none does, you're told so.
What are the signs of a slab leak?
An unexplained jump in the water bill, running water sounds with fixtures off, a warm spot on the floor, damp flooring, or a meter that moves when nothing is on.