How Much Does Slab Leak Detection and Repair Cost for Homeowners?

Slab leak detection and repair cost is confirmed after an on-site evaluation, with Apollo Plumbing providing an Upfront No Surprise Price before work begins. The biggest driver is how the leak is pinpointed through concrete and which repair method your home needs. Some underground leaks can be fixed with trenchless techniques that avoid tearing up your yard, which changes the total project cost. We regularly resolve slab and underground leaks in the Marysville area. All work is backed by a written guarantee. Current offer: $55 OFF Underground Leak Detection Services.

Price typically varies based on:

• Access and exact leak location (under slab, near a foundation wall, or at the service line)
• Detection methods used (digital camera inspection, hydrostatic testing, underground leak detection)
• Scope of repair (spot repair vs PEX repiping for aging domestic lines)
• Surface restoration needs after repair (concrete openings vs trenchless line replacement)

If you suspect an active slab leak, shut off the main water valve and schedule an evaluation to limit damage. <br/> Updated: 2026-03-10 <br/> Need help in Marysville, WA? Call (425) 387-1507 or book online.