Water Line Repair in San Mateo, CA

Water line repair in San Mateo costs $500-$3,000 for spot repairs. Full main water line replacement runs $1,500-$5,000+ depending on length, depth, and landscaping impact. Trenchless methods can reduce yard damage at a modest premium.

In San Mateo and San Mateo County, homeowners typically own and are responsible for the water line from the meter to the house. The municipality maintains the line from the street main to the meter. Check with your local water utility for exact boundaries.

Copper water lines last 50-70 years. Galvanized steel lasts 20-50 years (and can leach rust). PEX lasts 40-50+ years. Lead pipes (pre-1950s homes) should be replaced regardless of condition. If your San Mateo home has the original water line and it's over 50 years old, schedule an inspection.

Yes — trenchless methods like pipe bursting or directional boring can replace water lines with minimal excavation. Not all situations qualify (sharp bends, very shallow lines, or rocky soil may require traditional excavation). Ask the pros below for a trenchless assessment.