Quick Answer: A whole house repipe in the Bay Area costs $8,000-$18,000 for a typical 1,500-2,000 sq ft San Jose home, replacing all supply lines from the main shutoff to every fixture. PEX (cross-linked polyethylene) is now the dominant material for repiping at $8,000-$14,000 installed — it’s flexible, can be run through walls without many joints, and resists corrosion and scale. Copper repiping (the traditional choice) costs $12,000-$20,000+ — it lasts longer but has more joints and is more expensive both in material and labor. Galvanized steel repiping (what most older San Jose homes have) shows its age through rust-colored water, low pressure, and frequent leaks — these are signs you need a full repipe, not spot repairs.
Bay Area Repipe Cost Breakdown 2025
| Factor | PEX Repipe | Copper Repipe |
|---|---|---|
| Material cost (1,500 sq ft home) | $1,500 – $3,500 | $4,000 – $8,000 |
| Labor cost (Bay Area premium) | $6,500 – $10,500 | $8,000 – $12,000 |
| Total installed (1,500 sq ft) | $8,000 – $14,000 | $12,000 – $20,000 |
| Total installed (2,500 sq ft) | $12,000 – $20,000 | $18,000 – $30,000 |
| Wall patching after repipe | $1,500 – $5,000 (minor drywall) | $2,000 – $6,000 |
| Permit (San Jose) | $400 – $900 | $400 – $900 |
| Water heater (if replacing simultaneously) | $1,200 – $4,000 | $1,200 – $4,000 |
| Lifespan | 25-50 years | 50-75 years |
Signs Your San Jose Home Needs a Repipe
- Rust-colored or brown water — especially on first use in the morning after pipes have sat overnight. This is iron oxide from corroding galvanized steel pipe interior
- Low water pressure throughout the home — galvanized pipe corrodes from the inside, reducing the internal diameter from 3/4 inch to as little as 1/4 inch in severe cases
- Recurring pipe leaks — if you’ve had multiple pin-hole leaks in the same run of galvanized pipe, the entire line is failing, not just the patched spots
- Metallic taste in water — corrosion byproducts leaching into the water supply
- Orange scale in sink/tub aerators — consistent iron deposits indicate pipe interior corrosion
- Home built before 1970 with original plumbing — 55-year-old galvanized steel is past its expected service life in the Bay Area’s water chemistry
Quartz Construction coordinates whole house repiping with plumbing subcontractors during home renovation projects in San Jose. Learn about home renovation services. CSLB #1003436 | Call (650) 749-7436.
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