House Repiping Cost
Repiping a house costs $1,500–$15,000+ depending on size and pipe material — PEX runs roughly half of copper. Price your home, compare the materials, and see why polybutylene and galvanized pipes make this a when-not-if project.
Replacing all the water pipes in a house runs $1,500 to $15,000+ — and the two things that set your number are the size of the home and whether the new pipes are PEX (the flexible, affordable modern choice) or copper (the premium). If your walls hold gray polybutylene or old galvanized steel, this is a when-not-if project.
Which is closest to your home?
No need to be exact — just pick the nearest match. Bathrooms matter more than square footage here: every sink, toilet, tub, and appliance is a run of pipe, so a 3-bath home has far more plumbing than a 1-bath home of the same size. In between? Expect to land between those tiers' prices.
New pipes: PEX or copper?
PEX is flexible plastic tubing — it snakes through existing walls with fewer cuts, doesn't corrode, handles freezes better, and costs a fraction of copper, which is why most repipes today use it. Copper is the traditional premium: rigid metal piping with a 50+ year track record, naturally germ-resistant, but the material alone costs several times more and takes longer to install.
What's in your walls now?
This doesn't change the price — it tells us why you're repiping, and what to warn you about. Gray polybutylene (installed roughly 1978–1995) is brittle plastic that fails suddenly; many insurers won't cover homes that still have it. Galvanized steel (common before the 1960s) rusts shut from the inside — weak pressure and brown water are the tells. Pick the last option for leaky copper or if you're not sure.
Cost to repipe a 3 bed / 2.5 bath home
$3,070–$7,400
all new PEX water pipes, permits included — wall patching and painting afterward is extra
Gray polybutylene: repipe on your schedule, not the pipe's
Polybutylene doesn't leak-and-warn — it degrades from chlorine exposure and fails suddenly, often as a burst that floods finished space. Repairs are money into a condemned system, and many insurers surcharge or refuse homes that still have it, which also haunts resale. A planned repipe costs what this page shows; an emergency one adds water damage, mold work, and hotel nights. Not sure what you have? A $100–$200 plumbing inspection settles it.
PEX vs copper, and the bill nobody mentions
PEX wins most repipes: it snakes through existing walls with far fewer cuts, shrugs off freezes and corrosion, and costs a fraction of copper — which keeps its premium for durability pedigree and resale optics. Either way, budget the quiet extra: repiping means cutting drywall in many places, and patching, texturing, and painting those openings is usually a separate bill (drywall repair runs $1.50–$3.50 per square foot) — ask every bidder whether wall repair is included. Plan for days without water, up to a week-plus in bigger homes.
Prices are whole-home ranges by size and material — PEX $0.50–$2.00 per foot in materials vs copper's $2–$10+ is most of the gap — plus $70–$400 in permits, which bids may or may not include. Assumes standard access: homes on concrete slabs, with plaster walls, or with pipes under finished ceilings run past the top of the range. Excludes wall patching and painting afterward, and new fixtures. Replacing pipes for one fixture alone runs $100–$350.
💡About this calculator▼
Repiping — replacing every water supply pipe in the house — is plumbing's biggest routine job, and it usually arrives one of three ways: your walls hold gray polybutylene (the 1978–1995 plastic that fails without warning, and that many insurers now surcharge or refuse), your galvanized steel pipes have spent seventy years rusting themselves shut, or your copper has sprung its second or third pinhole leak and the pattern is obvious. Whichever road brought you here, the cost question has two big levers: how much house and which new pipe.
The size lever is really a bathroom count — every sink, toilet, tub, and appliance is a run of pipe, so plumbing scales with fixtures more than square footage. A 2-bed/1-bath home repipes for $1,500–$4,000; a typical 3-bed/2.5-bath for $3,000–$10,000; a 4-bed/3-bath for $6,000–$15,000+.
The material lever is the modern repiping decision: PEX or copper. PEX — flexible plastic tubing at $0.50–$2.00 per foot in materials — has become the default for repipes for a practical reason: it *bends*. Installers snake it through existing wall cavities the way electricians fish wire, which means fewer drywall cuts, faster jobs, and lower labor on top of cheaper material. It doesn't corrode, tolerates freezes better, and runs quieter. Copper — $2 to $10+ per foot — is the premium traditionalist's choice: rigid, proven across 50+ years, naturally germ-resistant, and still the material some buyers and inspectors smile at. On the same house, copper typically runs 40–60% more than PEX.
Pick your home size, your material, and what's currently in your walls below. The estimate includes permits (which bids "may or may not" include — worth asking) and comes with the honest disclosure most quotes bury: repiping means cutting open drywall in a lot of places, and patching and painting those openings afterward is usually a separate bill.
Home size sets the amount of pipe; material sets the rate; permits ride along.
Whole-home repipe, by size and material: | Home | PEX | Copper | |---|---|---| | 2 bed / 1 bath | $1,500–$2,500 | $2,500–$4,000 | | 3 bed / 2.5 bath | $3,000–$7,000 | $4,500–$10,000 | | 4 bed / 3 bath | $6,000–$8,000+ | $8,000–$15,000+ |
Why the gap: materials. PEX tubing costs $0.50–$2.00 per linear foot against copper's $2–$10+, and PEX's flexibility also cuts labor — it snakes through existing walls with far fewer drywall openings.
+ Permits and inspection: $70–$400, shown separately because contractor bids "may or may not" include them.
Not included (and worth budgeting): patching, texturing, and painting the drywall openings the repipe leaves behind — drywall repair runs $1.50–$3.50 per square foot, ceilings $2–$4, painting $1–$3. Ask every bidder whether wall repair is in their number; many exclude it.
Timeline: a few days for smaller homes, a week or more for larger ones — with water shut off for stretches of it.
📐How it's calculated▼
Total = the size × material band + permits ($70–$400).
Example — the typical job: 3 bed / 2.5 bath in PEX:
→ $3,000–$7,000 + permits = $3,070–$7,400
Example — the same house in copper:
→ $4,500–$10,000 + permits = $4,570–$10,400 — roughly half again over PEX, driven by materials ($2–$10+/ft vs $0.50–$2) and slower, cut-more-walls installation.
The scale check: a single fixture's pipes can be replaced for $100–$350 — so a whole-house repipe at $3,000–$7,000 is buying roughly 20–40 fixture-repairs' worth of work in one planned job. That's the honest comparison when you're deciding whether to keep patching a failing system leak by leak.
🔍Finding your inputs▼
How big is your home? Pick the nearest bed/bath match. Bathrooms drive the price more than floor area — each bathroom adds supply runs for a sink or two, a toilet, and a tub or shower, which is why the table is organized by bed/bath count rather than square feet. If your home sits between tiers (say 3 bed / 2 bath), expect to land between those tiers' numbers; if you're above the largest (5+ beds, 4+ baths), treat the top band as a floor.
New pipes — PEX or copper? The practical answer for most repipes is PEX: because it's flexible, installers pull it through existing wall cavities with far fewer cuts, which saves money twice (cheaper material, less labor) and spares your drywall. It doesn't corrode, handles hard freezes better than rigid pipe (it can expand slightly instead of splitting), and quiets the water-hammer clatter older systems make. Copper remains the premium pick: a rigid metal system with a half-century track record, natural resistance to bacteria, and a reputation that carries weight at resale — at 40–60% more for the same house, and with more wall-opening during installation. There's a third option, CPVC (rigid plastic, priced near PEX), but it combines PEX's plastic with copper's rigidity while matching neither's strengths, so most modern repipes skip it. One honest note in copper's column: in areas with aggressive water chemistry — the same water that pinholes old copper — new copper can face the same enemy, which is worth asking a local plumber about before paying the premium.
What's in your walls now? This changes the advice, not the price. Gray polybutylene — dull gray plastic, usually stamped "PB2110", installed roughly 1978–1995 — is the material behind one of the largest class-action settlements in home-construction history: it degrades from contact with chlorinated water and fails suddenly rather than gracefully. Many insurers surcharge or decline homes that still have it, and buyers' inspectors flag it every time. Galvanized steel — gray threaded metal pipe, standard before the 1960s — corrodes from the inside, so its story is slow strangulation: pressure fades over years, water runs brown after time away, and rust flecks collect in faucet screens. Leaky copper or not sure covers the pinhole pattern (repeat small leaks mean the system, not the spot) and everyone who hasn't looked yet — a $100–$200 plumbing inspection identifies your pipes if the water heater's connections and basement runs don't make it obvious.
⚠️Special situations▼
How do I know if my house has polybutylene, and do I really have to replace it?
Look, then decide with clear eyes — because polybutylene is the one plumbing material where 'it's been fine so far' is a statement about luck, not condition. Identification first: polybutylene supply pipe is usually dull gray (occasionally blue or black), flexible-looking plastic, commonly stamped 'PB2110' along its length. Check where pipes are visible: at the water heater's connections, under sinks, in the basement or crawl space ceiling, at the main shutoff. Homes built or replumbed between roughly 1978 and 1995 are the candidates — it was installed in millions of American homes because it was cheap and easy. If you can't tell, a $100–$200 plumbing inspection settles it, and it's worth settling before an insurance renewal or a sale forces the question. Why it can't stay: chlorine and other disinfectants in municipal water attack polybutylene from the inside, making it brittle over years — and brittle plastic under constant pressure doesn't develop warning leaks, it ruptures. The failures that made it famous (and drove the billion-dollar Cox v. Shell settlement, long since closed to claims) were sudden bursts flooding finished homes. That failure mode is why the practical world has already voted: many insurers surcharge, exclude water damage, or decline coverage on poly-plumbed homes; inspectors flag it in every transaction; and lenders occasionally balk. So 'do I have to?' unpacks into: not legally, today, this minute — but you're carrying an uninsurable-trending risk that fails catastrophically, repairs to it are money into a condemned system, and every year of waiting is a coin flip on doing this as a planned project versus an emergency with water damage attached. The planning answer: get the repipe quoted now (this calculator's bands are the market), schedule it on your terms, and if you're buying a poly-plumbed home, price the repipe into your offer — sellers know why it's there.
My water pressure has gotten weak over the years — is that my galvanized pipes, and will repiping fix it?
Almost certainly yes and yes — gradual, house-wide pressure loss in a home with galvanized supply pipes is the textbook presentation, and repiping is the cure rather than a treatment. What's happening inside: galvanized pipe is steel with a zinc coating, and once the zinc sacrifices itself (a few decades in), the steel rusts inward. The corrosion doesn't just weaken the pipe — it builds up, layer by layer, physically narrowing the channel. A pipe that started at three-quarters of an inch can be carrying water through a pencil-width opening after sixty years. That's why the symptoms are so characteristic: pressure that's worse at fixtures farther from the meter, hot water weaker than cold (hot water corrodes faster), flow that drops noticeably when two fixtures run at once, brown or rusty water after vacations, and orange grit in aerator screens. Confirm before concluding: check that the main shutoff and any pressure regulator are fully open and functioning (a failing regulator mimics dying pipes for a fraction of the cost), and note whether pressure is weak at the street side too — if the city's own pressure is low, no repipe fixes that. But when the pattern fits and the pipes are galvanized, spot repairs are futile in a specific way: cutting into heavily corroded galvanized to replace a section often triggers leaks at the disturbed joints nearby, because the threads holding the system together are themselves rust. Plumbers call it whack-a-mole for a reason. What repiping buys you beyond reliability is the part owners rave about: full water pressure, often for the first time in the home's modern history — showers that push back, appliances that fill fast, two bathrooms running at once. Two bonuses while the walls are open: pre-1960s galvanized systems sometimes connect through lead-soldered joints or even lead service stubs, which retire with the repipe, and your homeowners insurance generally looks kindlier on a repiped house at renewal. Price it honestly with the calculator — galvanized homes skew older and sometimes plaster-walled, which pushes toward the band tops — and treat brown-water mornings as the system's two-minute warning.
Can the plumbers repipe without destroying my walls? How bad is the drywall damage really?
Better than the horror stories, worse than the brochures — and the material choice and crew experience drive most of the difference. What actually happens: a repipe crew needs access at fixture connections, at the manifold or trunk lines, and at points where pipe changes direction or floor. With PEX, whose flexibility lets it be pulled through cavities like electrical wire, an experienced repipe-specialist crew on a typical home makes something like a dozen to two dozen openings — mostly neat rectangles below sinks, behind toilets, at the water heater, and a strip or patches along key runs — rather than trenching every wall. With rigid copper, add more openings: it can't bend around framing, so each direction change may need access. The variables that swing it: slab-on-grade homes (no basement/crawl to run pipe through) need more wall and ceiling routing; two-story homes need paths between floors; plaster is slower and messier to open than drywall; and crews that do repipes daily cut fewer, smarter holes than general plumbers who do one a month — a genuinely good reason to hire a repipe specialist and to ask 'how many openings, and where?' during quotes. Now the honest part most bids whisper: closing the holes usually isn't in the plumbing quote. The plumber's job typically ends at 'pipes work, holes covered or left neat'; patching, texture-matching, and painting is either an add-on, a second trade, or your weekend — at roughly $1.50–$3.50 per square foot for drywall repair plus $1–$3 for painting, a whole-house repipe's wall restoration commonly lands in the several-hundred-to-$2,000 range depending on count and finish quality. Three practical protections: get the wall-repair question answered in writing in every bid (included? patched-not-painted? excluded?); ask the crew to photograph every opening location before cutting (helps the patch crew and your records); and if you're planning to repaint rooms anyway, sequence the repipe first — it converts the patching from damage into prep.
We're on a slab foundation — does that change the repipe?
It changes the shape of the job more than any other single fact about your house — and it's the situation where PEX stops being a preference and becomes the plan. The issue: in slab-on-grade construction, the original supply lines often run *under* the concrete slab. When those pipes fail (the infamous 'slab leak' — a warm spot on the floor, the sound of running water with everything off, an inexplicable water bill), you cannot practically service them: jackhammering the slab to chase pipe is disruptive, expensive, and only fixes the section you opened. So slab-home repipes almost never replace pipes where they lie. Instead, the repipe *reroutes*: the crew abandons the under-slab lines in place (drained and capped) and runs new supply lines overhead — up into the attic or through walls and ceilings, dropping down to each fixture. This is exactly the job flexible PEX was born for: it pulls through attics and down wall cavities with minimal cutting, tolerates attic temperature swings (with proper insulation), and its continuous runs minimize joints in inaccessible spaces. Copper can be rerouted too, but rigid pipe in an attic run means many more fittings and openings, and in freeze-prone regions attic copper demands scrupulous insulation. Cost-wise, slab reroutes push toward and past the tops of this calculator's bands — more routing complexity, more ceiling drops, sometimes more wall repair — but the premium buys permanence: the new system lives where it can be inspected and serviced forever after, and the under-slab gamble is retired completely. Two slab-specific notes: if you're repiping because of an active slab leak, ask insurers and plumbers about coverage before assuming — access and water damage from a sudden slab leak is sometimes covered even where the repipe isn't; and beware the partial fix — repairing one slab leak in a system that's demonstrated failure usually precedes the next warm spot by a year or two. Slab homes with polybutylene or a leak history are the clearest whole-repipe candidates in all of plumbing.
❓Common questions▼
How much does it cost to repipe a house?
Repiping a whole house costs $1,500 to $15,000 or more, with the two big levers being home size (really bathroom count — every fixture is a run of pipe) and pipe material. With PEX, the flexible plastic tubing most modern repipes use: a 2-bed/1-bath home runs $1,500–$2,500, a 3-bed/2.5-bath $3,000–$7,000, and a 4-bed/3-bath $6,000–$8,000+. In copper, the premium option: $2,500–$4,000, $4,500–$10,000, and $8,000–$15,000+ respectively — roughly 40–60% over PEX, driven by material costs ($2–$10+ per linear foot against PEX's $0.50–$2.00) and slower installation that opens more wall. On top of the repipe itself, permits and inspection run $70–$400 — and contractor bids may or may not include them, so ask. What's typically not in any of those numbers: repairing the walls. Repiping means cutting drywall access openings throughout the house, and patching, texturing, and painting afterward is usually a separate bill (drywall repair runs $1.50–$3.50 per square foot, painting $1–$3) that can add several hundred to a couple thousand dollars — get every bidder's answer on wall repair in writing. Configurations that push past the published tops: slab-on-grade homes (pipes get rerouted overhead rather than replaced in place), plaster walls, and finished ceilings under every pipe run. Timeline-wise, expect a few days for smaller homes and a week or more for larger ones, with water off for stretches. For scale: replacing the pipes to a single fixture runs $100–$350, which is why homes on their second or third leak stop patching and price the whole job. Use the calculator above for your size and material.
Is PEX as good as copper for repiping?
For most repipes, PEX isn't just as good — it's the better-suited tool, which is why it's become the default choice for replacing pipes in existing homes. The honest comparison: PEX's defining advantage is flexibility. It pulls through existing wall cavities the way electricians fish wire, which means far fewer drywall openings, faster installation, and lower labor — and in slab-on-grade homes, where repipes reroute through attics and walls, that flexibility is essentially mandatory. It doesn't corrode (immune to the pinhole leaks and mineral buildup that kill copper and galvanized systems), it tolerates freezing better than any rigid pipe (it can expand slightly rather than split), it dampens water hammer for quieter plumbing, and modern PEX carries 25-year-plus manufacturer warranties with several decades of field history behind it. Copper's genuine advantages: the longest track record of any modern supply material (50+ year installations are routine), natural antimicrobial properties, higher heat tolerance, UV tolerance (PEX degrades in sunlight and can't be run exposed outdoors), rodent-proof walls (a determined rodent can chew PEX; it's rare but real), and resale optics — some buyers and inspectors still read copper as the premium signal it historically was. Where copper's premium is worth paying: historic or high-end homes where buyers expect it, exposed-pipe installations, and owners who simply value the material's pedigree over the 40–60% price difference. Where it isn't: slab reroutes, freeze-prone climates, budget-conscious repipes — and notably, regions with aggressive water chemistry, where new copper faces the same corrosive water that pinholed the old copper (ask a local plumber what fails in your area; they know). One more nuance: fitting systems matter more than brand debates — expansion-style PEX connections and properly supported runs are what separate 50-year PEX installs from callback generators, so hire crews who repipe weekly, whatever material you pick.
Should I repair my old pipes or repipe the whole house?
Count the leaks and name the material — those two facts answer it more reliably than any quote. The material rule first, because some pipes are past the question: gray polybutylene (1978–1995) should be replaced on discovery, not repaired — it fails suddenly rather than leak-by-leak, insurers increasingly won't stand behind it, and repairs are money into a system whose failure mode is a flood. Galvanized steel that's showing symptoms (fading pressure, brown water, rust in aerators) is likewise done as a system — corrosion narrows and weakens it everywhere at once, and cutting into rusted galvanized to fix one section routinely springs leaks at the disturbed joints nearby. For those two materials, repair-vs-repipe isn't really open. Copper and other systems get the pattern rule: one leak is an event — fix it ($100–$350 per fixture-level repair) and move on. Two or three leaks within a couple of years is a pattern, and patterns in pipe mean the whole system shares the cause — water chemistry eating the walls, decades of wear, bad original workmanship — so each repair buys months while the next weak spot ripens. That's the standard threshold where plumbers stop patching and start quoting repipes, and the arithmetic supports them: at $100–$350 per repair plus the ceiling/wall damage each surprise leak causes, a leak-a-year habit costs a meaningful fraction of a $3,000–$7,000 planned PEX repipe while delivering none of its certainty. Factors that tip a close call toward repiping now: an upcoming remodel (walls already open = cheapest repipe you'll ever get), a slab leak history, insurance pressure or a sale on the horizon, and any material identification uncertainty (a $100–$200 inspection beats guessing). Factors that justify holding: a single isolated failure with a clear one-off cause, pipes verified as sound modern material, or a planned move where disclosure economics genuinely pencil differently. When in doubt, ask your plumber the clarifying question: 'is this leak a spot problem or a system problem?' — and notice whether they answer with evidence.
How long does repiping a house take, and can we live there during it?
A few days for smaller homes, a week or more for larger ones — and yes, nearly everyone lives at home through it, because good repipe crews are built around keeping your water on every night. The standard rhythm: crews run the complete new system first (PEX's pull-through installation shines here) while the old pipes keep working, then make the changeover — cutting water off, connecting the new system, and restoring service — in a concentrated stretch, often a single day. That means most of the project has water flowing normally, with the shutoffs limited to the changeover and fixture-by-fixture connections. Expect the real daily disruptions to be the other kind: drop cloths and open walls in multiple rooms, crew traffic, drilling and cutting noise through workdays, and fixtures out of service one at a time as they're connected. Practical planning: confirm the crew's water-off windows in advance (overnight water is the norm to insist on — fill some jugs for the changeover day anyway), plan around one bathroom being available through most of the job in multi-bath homes, and if anyone works from home, know that the loud phase is genuinely loud. The tail of the project is the part that runs longer than people expect: after pipes pass inspection (the permit's $70–$400 covers the inspector's sign-off), the wall openings need patching, texture, and paint — either by the plumber's finish crew, a drywall sub, or you — which can add days-to-weeks of calendar time depending on scheduling, even though the plumbing itself is done. Sequencing wisdom if you have the luxury: repipe before planned painting or flooring (patches become prep instead of damage), never right after it; bundle a water heater replacement if yours is near the end anyway (the connections are being remade regardless); and book repipe specialists rather than general plumbers — a crew that does two repipes a week has the changeover down to hours and the hole count down to the minimum, which is exactly what you're paying for.
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