How to tell a repipe is the right call
Most Central Coast homes that need repiping fall into three groups. Galvanized steel supply lines, common in houses built before the mid-1960s, rust from the inside out — pressure drops, hot water runs discolored, and the corrosion accelerates once it starts. Polybutylene, installed roughly between 1978 and 1995, fails at the fittings with little warning. And soft copper installed in the 1970s and 80s develops pinhole leaks once the pipe wall thins, usually appearing in clusters over a couple of years.
The economics are simple. A single emergency copper repair with drywall access and drying typically runs $400 to $1,200, and insurance claims on repeated water damage can affect your premium or your coverage. Once you are paying for a second or third repair in the same house, that money is better spent ending the cycle.
We do not push a repipe when a repair will do. If your piping is sound copper with one isolated failure — a nail strike, a bad fitting, an obvious mechanical cause — we say so and fix the section. The walkthrough includes checking static pressure at a hose bibb, inspecting exposed pipe at the water heater and under sinks, and looking at what the previous plumbing work in the house tells us.
What a whole-house repipe actually involves
Day one is layout and protection. We cover floors and furniture, map the new pipe routing to minimize wall openings, and cut clean, patchable access — usually in closets, above cabinets, and at the top plate of walls rather than through the middle of finished surfaces. The new manifold or trunk-and-branch layout is planned so future service does not require another round of demolition.
Day two and three are the pipe run: hot and cold to every fixture, new angle stops and supply lines at each sink and toilet, a new water heater connection, new hose bibbs where needed, and a main shutoff you can actually reach and turn. We pressure-test the new system before anything is closed up, then call for the rough inspection required by the California Plumbing Code.
After inspection passes, we tie in, restore water service, and patch. Drywall patching and texture matching is included in our repipe quotes; paint is the homeowner's last step and we tell you exactly which rooms and walls need touch-up. Most three-bedroom, two-bath homes finish plumbing in three to five working days, with water restored each evening.
PEX-A versus copper on the Central Coast
Uponor PEX-A is our default for residential repipes. It runs in long continuous lengths with far fewer fittings, which removes most of the joints where leaks start. It tolerates the occasional freeze better than rigid pipe, is quieter under flow, and installs faster — which lowers your labor cost. Expansion-ring fittings are mechanically sound and covered by a long manufacturer warranty when installed by a trained installer.
Type L copper still earns its place. Exposed runs in garages and mechanical rooms, commercial applications, some HOA and condo specifications, and homeowners who simply prefer copper all get it. It is more expensive in both material and labor, but it is rigid, UV-stable, and completely proven.
Local water chemistry is not aggressive enough to rule out either material. What usually decides it is house construction, whether attic or crawlspace access exists, exposure of the runs, and budget. During the walkthrough we show you where each material would go and why, and price both if you want the comparison.
Cost, permits, and what your quote includes
Partial repipes typically run $2,500 to $5,000, and whole-house repipes typically run $9,000 to $18,000, depending on size, number of stories, and access. A compact two-bath PEX repipe with good crawlspace access sits near the bottom of that range; a larger two-story home in copper with limited access sits near the top. Multi-unit and commercial repipes are quoted per building after a walkthrough.
The quote is fixed and written before we start, and it includes the permit, all materials, angle stops and supply lines, the pressure test, the inspection, and drywall patch and texture. We do not bill hourly on repipes, and change orders only happen when something genuinely unknown is uncovered behind a wall — in which case you approve the cost before we proceed.
Every repipe is permitted and inspected. That inspection record matters at resale and on insurance claims, and it is legally required in San Luis Obispo County for pipe replacement. Workmanship is warranted for one year, and the pipe manufacturer's warranty is registered in your name.
