Repiping Redwood City, CA
One pinhole leak is a repair. The second and third are a message from the pipe itself. Leak Detection Pros handles the repiping Redwood City, CA homeowners choose when patching stops making sense — new water lines in PEX or copper, permitted and inspected, with the price range in writing before the first wall is opened.
When Repiping Beats Another Repair
Repiping makes sense when the pipe itself — not one unlucky joint — is the problem: a line that has failed in two or more places has told you the whole run is at the end of its life. With 61% of Redwood City's homes built between 1940 and 1980, that moment arrives for a lot of local houses, and every spot repair on an end-of-life line is money spent buying a few months.
Run the honest five-to-ten-year math the way we do with homeowners. A single slab spot repair typically runs $1,500–$3,500, and a reroute $2,000–$4,500. Two or three of those inside a few years — each with its own detection visit and its own patch in the floor or wall — adds up to the price of replacing the line outright, except you still own the rest of the old pipe. That is the crossover point where we start recommending a repipe, and we will show you the leak pattern from our detection report so you can see the reasoning yourself.
The warning signs that a system is approaching that point:
- Repeat pinhole leaks — a second leak on the same line is the pattern, not bad luck
- Rusty or discolored water after the house sits unused, a hallmark of galvanized pipe corroding from the inside
- Pressure that keeps fading as mineral scale and corrosion narrow the old lines
- Galvanized-era plumbing — pre-1960s supply lines still in service are decades past their design life
- A remodel already opening the walls, when replacing old lines costs the least it ever will
- Leaks under the slab — if yours are in the concrete, start with our slab leak detection service so the repipe plan is built on a map, not a guess
Start With Detection, Not a Sales Pitch
We are a detection company first. Every repipe we quote begins with locating the leaks and documenting the pattern — which lines have failed, which are still sound. Sometimes the honest answer is a reroute of one bad line for a fraction of a full repipe, and when that is the case, that is what we recommend.
See how the diagnosis works on our Redwood City leak detection overview — the same process stands behind every repipe decision.
PEX or Copper? An Honest Comparison
PEX is the right call for most Redwood City repipes — it costs far less and installs with fewer fittings — while copper earns its premium where homeowners want the longest-proven material in the walls. Here is how the two stack up on the numbers that matter:
| Factor | PEX | Copper |
|---|---|---|
| Typical cost, 2,000 sq ft home | $2,000 – $4,000 | $8,000 – $16,000 |
| Installation | Flexible runs, fewer joints inside walls | Rigid, soldered joints at every turn |
| Behavior in a cold snap | Expands slightly instead of splitting | Can split if water freezes inside |
| Track record | Standard in new Peninsula construction | Decades of service in the city's older homes |
One local fact shapes this choice less than people expect: Redwood City's water is Hetch Hetchy water — some of the softest in California. Neither material is being eaten by aggressive water here. What kills the old lines in this city is age and pressure, and both PEX and copper answer that. We price both options for your house and let the numbers make the argument.
Partial Repipes Are Often Enough
A "repipe" does not have to mean every pipe in the house. If the failures cluster on one branch — say, the hot-water run under a crawl space — replacing that branch and leaving sound lines in place can cut the cost dramatically. We scope the work to the lines that have actually failed, and the detection report is what tells us where that line sits.
What a Repipe Costs in Redwood City
A full repipe typically runs $1,500–$15,000 across published national guides, with most homes landing around $7,500 — and material choice is the biggest lever in that range. These are the figures we plan around:
| Scope | Typical Range |
|---|---|
| Reroute — bypass one leaking line | $2,000 – $4,500 |
| PEX repipe, typical 2,000 sq ft home | $2,000 – $4,000 |
| Copper repipe, typical 2,000 sq ft home | $8,000 – $16,000 |
| Partial or full repipe, all scopes | $1,500 – $15,000 |
Your quote is a range in writing, after we have assessed the house — never a number invented over the phone. Bay Area labor tends to price above national averages, which is exactly why the on-site assessment matters more than any table.
Permits and Licensing, Done Properly
Repiping is permitted work in Redwood City. Permits are pulled through the City's Building Division at 1017 Middlefield Road, and the installation is inspected — that inspection is your protection, and we build it into the schedule rather than treating it as a nuisance.
California law also sets the bar for who can do this work: plumbing contracting requires a CSLB C-36 license, and that license is mandatory for jobs of $1,000 or more in combined labor and materials. When you compare repipe quotes, ask every bidder for their C-36 number and whether the permit is included — the answers separate the real contractors from the handymen fast.
Related Services
A repipe decision usually starts with a leak — these are the services that feed into it:
Slab Leak Detection
Repeated under-slab leaks are the most common trigger for a repipe conversation. We pinpoint them before anyone commits.
Learn more →Crawl Space Leak Detection
Underfloor lines in raised-foundation homes, inspected directly — and the evidence for whether a branch repipe will do.
Learn more →Emergency Leak Repair
When the old line lets go at 2 a.m., shut it down first — the repipe conversation can happen in daylight.
Learn more →Repiping Questions Homeowners Ask Us
How do I know if I need a full repipe or just a reroute?
The rule of thumb we use: one leak is a repair, but a line that has leaked in two or more places is telling you the whole run is at the end of its life — that is when a reroute or repipe becomes the cheaper answer over the next five to ten years. We pinpoint the leaks first and show you the pattern before recommending either.
Should I choose PEX or copper for a repipe?
Both are proven materials. PEX typically costs far less — published ranges for a 2,000 sq ft home put PEX at $2,000–$4,000 against $8,000–$16,000 for copper — and its flexibility means fewer fittings inside walls. Copper costs more and has the longer track record in older Redwood City homes. We price both for your house and explain the trade-offs honestly.
Does a repipe need a permit in Redwood City?
Yes — plumbing installations and modifications require a permit, pulled through the City of Redwood City Building Division at 1017 Middlefield Road, and the work is inspected. In California, plumbing work of this size also requires a CSLB C-36 plumbing contractor license. We handle the permit as part of the job.
How long does a repipe take, and will I have water?
Most single-family repipes are measured in days rather than weeks, and the work is sequenced so your water is typically back on at the end of each day. The exact schedule depends on the size of the home and whether the lines run through a slab, crawl space or attic — we map it out with you before starting.
What does a repipe cost in Redwood City?
Published guides put a typical partial or full repipe between $1,500 and $15,000, with most homes landing around $7,500. Material is the biggest lever: PEX runs $2,000–$4,000 for a typical 2,000 sq ft home, copper $8,000–$16,000. Your number is quoted as a range in writing after we have seen the house — never a guess over the phone.
Will a repipe fix my low water pressure?
If the pressure drop comes from corroded, narrowed galvanized lines — very common in Redwood City's pre-1960s stock — then yes, new full-size lines restore the flow the house was built with. If the cause is the incoming service line or a failing regulator, we will identify that during the assessment instead of selling you pipe you do not need.
Do I have to move out during a repipe?
Almost never — most single-family repipes are done with the family still living in the home. Water is shut off in stretches while lines are swapped and is typically back on at the end of each day, and the dusty work is limited to the small openings where the new lines run. It is a disruptive stretch, not a relocation: expect drop cloths, some noise, and a bathroom schedule worth planning around, but not a hotel.
Why are so many homes in this area being repiped now?
Because the pipes and the calendar finally agree. About 61% of Redwood City homes were built between 1940 and 1980, so a large share of the city is running on original galvanized or early copper piping that is at or past its expected service life. Galvanized lines corrode from the inside until pressure falls and the water discolors; older copper develops pinhole leaks one at a time. One leak is a repair — a repeating pattern is what makes a repipe the honest conversation.
Tired of Patching the Same Old Lines?
Get the leak pattern documented first, then decide — repair, reroute or repipe — with real ranges on paper. No pressure, and no repipe sold where a reroute would do.
Call (650) 632-9185 Request a Quote