Whole House Repipe Cost in DC, VA & MD: 2024 Guide

Signs You Need to Repipe Your House

A whole-house repipe means we replace all the hot and cold water supply lines, from where the water enters your house to every faucet and fixture. This isn't about fixing one leak; it's about solving a system-wide problem before it gets worse. A lot of homes in Arlington, Alexandria, and across the DMV have old galvanized steel or polybutylene pipes that are known to fail. Waiting for a pipe to burst can cause tens of thousands in water damage, so planning a repipe is just smart money.

It's not just about how old your pipes are, it's about how they're working—and the risk you're taking. If you're in a 1950s Fairfax County rambler or a 1920s Columbia Heights rowhouse, your pipes are on borrowed time. Having a plumber out every few months isn't normal. It's a sign your whole system is shot. Ignoring it is a gamble you'll eventually lose.

One leaky pipe can be a fluke. But if you're getting multiple leaks in a year, you've got a bigger problem. It costs less to replace everything at once than to pay for one emergency repair after another.

• Low Water Pressure: Weak pressure all over the house, usually from corrosion and scale clogging old galvanized pipes.
• Rusty or Discolored Water: Brown or yellow water, especially when you first turn on a tap, means your steel pipes are corroding.
• Recurring Leaks: Multiple pinhole leaks in different spots are a clear sign the whole system is failing.
• Visible Corrosion: On exposed pipes in a basement or crawlspace, look for flaking, weird colors, or green stains on copper.
• Problematic Pipe Material: Homes built from the late '70s to mid-'90s might have polybutylene pipes, which get brittle and fail without warning.
• Strange-Tasting Water: A metallic taste means pipe corrosion could be getting into your water.

What Drives the Price of a Repipe?

No two repipe jobs have the same price tag because no two houses are the same. That big cost range you see comes from all the little differences between projects. Once you know the factors, you'll understand why a quote for a small Arlington condo is so different from a big house in Potomac, MD.

How hard it is to get to the pipes is the biggest thing that affects labor costs. It's simple to run new pipes in a house with an unfinished basement and drywall. But a house on a concrete slab with plaster walls? That takes a lot more time, effort, and repair work afterward. We have to cut open walls and ceilings to run the new lines, and how hard that is to do drives a big part of the cost.

• House Size: Bigger houses need more feet of pipe.
• Number of Stories: A three-story Alexandria townhome is harder to work on than a one-story rambler.
• Number of Fixtures: Each sink, toilet, shower, and washer is another connection that adds labor and material.
• Pipe Material: Copper costs much more than PEX for both the material and the labor to install it.
• Pipe Access: Unfinished basements and crawlspaces make the job cheaper. Concrete slabs and plaster walls make it more expensive.
• Permit Fees: These vary by jurisdiction, from DC to Fairfax and Montgomery Counties.
• Wall Repair: Budget for patching and painting the access holes we need to make.

Repiping Cost: PEX vs. Copper

Choosing between PEX and copper is a big decision that affects the project's cost and how your plumbing works for years to come. We install both and can help you decide what's right for your house and budget.

PEX is a flexible plastic tubing that's now the go-to for most residential repipes. Because it's flexible, we can snake it through walls like an electrician runs wire, which means fewer holes to cut and patch. That makes the job faster and cheaper. PEX also resists scale and corrosion, and it handles the DMV's freeze-thaw cycles better than rigid pipe.

For a long time, copper was the top choice for plumbing because it's tough and lasts. A good installation of Type L copper pipe can last 70 years or more. But it's rigid, so it needs more fittings and a lot of soldering, which adds to labor time and cost. Some people just trust copper more, and for certain high-end homes or commercial jobs, it's still the main choice.

• PEX-A (Uponor): Costs 30-50% less than copper. It’s flexible, quick to install, resists corrosion, and reduces water hammer. We recommend it for most homes.
• Copper (Type L): A premium choice. Material costs are high and change often. The labor is intense, requiring soldering. Expect the project to cost 50-75% more than PEX.
• CPVC: A rigid plastic we don't usually recommend for whole-house jobs. It's cheaper than copper but can get brittle and crack if not installed perfectly.

Estimated Repiping Costs for Common DMV Homes

To give you a better idea, here are some typical cost ranges for common houses in our area. These are just ballpark numbers for planning. Your actual cost will depend on the factors we've talked about, especially how easy it is to get to the pipes and the exact work needed. These estimates are for a professional, permitted job by a licensed and insured contractor like us.

Take a standard 2,000 sq. ft. two-story colonial in Fairfax or Montgomery County with 2.5 baths and a basement. Access is usually easier, so the cost is lower. A PEX repipe would probably run $8,500 to $14,000. For the same house in copper, you're looking at $13,000 to $20,000. This is a common size home people ask about.

On the other hand, a historic rowhouse in Georgetown or on Capitol Hill is a tougher job. These are often around 1,800 sq. ft. with 2 baths but have plaster walls, tight spaces, and historic district rules (HPRB). That all adds to the labor. A PEX job might be $10,000 to $17,000. A copper repipe could start at $18,000 and go over $25,000, especially if historic reviews are involved.

• Small Condo (Rosslyn, Silver Spring): ~800-1,200 sq ft, 1-2 bath. Costs vary a lot based on HOA rules and access. PEX: $6,000 - $11,000.
• DC Rowhouse (Columbia Heights, Petworth): ~1,500-2,200 sq ft, 2-2.5 bath. Often has plaster walls, no basement. PEX: $9,500 - $17,000. Copper: $15,000 - $24,000+.
• Suburban Single-Family (Arlington, Bethesda): ~2,000-3,500 sq ft, 2.5-3.5 bath. Usually has basement access. PEX: $9,000 - $16,000. Copper: $14,000 - $22,000.

The Repiping Process: What to Expect

A whole-house repipe is a big job, but we run our projects to keep the disruption down. For an average house, the work itself usually takes between three and seven days. We keep you in the loop and keep our worksite clean to make it as easy on you as we can.

Our main goal is to keep you from being without water for long. Most days, we can get the water back on before we leave. On the last day, the water will be off for a few hours for the final switchover and testing, but we'll schedule that with you ahead of time.

• 1. Consultation & Quote: The owner, Sharma, or a senior plumber will walk through your home, check the old pipes, talk about materials, and give you a detailed, fixed-price quote.
• 2. Scheduling & Permits: After you approve the quote, we schedule the job and handle all the permits with your local jurisdiction.
• 3. Prep: On day one, we protect your home, laying down drop cloths from the door to all work areas.
• 4. Access: We make small, careful cuts in the drywall or plaster to get to the pipes. We're not tearing down walls.
• 5. Install New Pipes: We run the new PEX or copper lines next to the old ones. We usually leave the old pipes in the walls because it's less messy than taking them out.
• 6. Connect Fixtures: We connect each sink, toilet, and shower to the new lines one by one.
• 7. Switchover & Test: Finally, we disconnect the old system and connect the new one at the water main. Then we pressurize the new pipes and check everything to make sure there are no leaks.
• 8. Inspection & Closeout: We schedule the final inspection with the local plumbing inspector. After it passes, the job is done and you can schedule painters to patch the walls.

Other Costs to Consider

A good contractor gives you a complete quote, but you need to know what's included and what might cost extra. You can run into surprises, especially in older houses, so it's good to be ready.

Patching and painting is the most common extra cost. Our quote covers the plumbing, but fixing the holes in the wall is a separate job, usually for a painter. You can have us coordinate that or hire your own person, but you should budget for it. We do our best to make the cuts small and smart to keep that repair cost down.

A repipe is also a good time for other plumbing upgrades. If your water heater is more than 10 years old, it makes sense to replace it while we're at it. As installers for brands like Bradford White and Rinnai, we can help you pick an efficient tank or tankless model that might qualify for federal or DCSEU rebates.

• Permits: Our quotes include the service of pulling permits; the city or county's fee is a separate line item.
• Wall Repair: Plan on spending an extra $500 to $2,500+ for a pro to patch and paint. Plaster repair costs more.
• Asbestos/Mold: If we find hazardous materials (common in pre-1980 homes), you'll need a licensed abatement company. This is required by law and is not in our plumbing quote.
• New Fixtures: If you want new sinks, faucets, or toilets, this is the best time to do it. Labor is cheap since we're already working on them.
• Water Heater Upgrade: A new, efficient water heater can improve performance and may qualify for rebates.
• Code Upgrades: The inspector might require other items, like your main shutoff valve, to be brought up to code.

Special Cases: Historic Homes, Rentals, and ADUs

Working in the DMV means dealing with a lot of local rules, and we know our way around them. For D.C. landlords, a repipe is a capital improvement, and we provide all the paperwork for your BBL and other records. The work also has to be managed around tenant rights, like TOPA. This is just general info, not legal advice, so you should always check the current rules with DC authorities.

If your home is in a D.C. historic district like Capitol Hill or Georgetown, your project might need a review by the Historic Preservation Review Board (HPRB). This process, run by the HPO, can add time and extra rules to the job. We've prepared the paperwork for HPRB reviews before and know how to get your home's systems updated while following the rules. For specific questions, you can call the HPO at (202) 442-7600.

In Virginia, new zoning laws (like SB 531, starting in 2027) will make it easier to build Accessory Dwelling Units (ADUs). If you're converting a garage in Arlington or building a cottage in Fairfax, you'll need plumbing. Doing a repipe on the main house at the same time you're building an ADU can be a smart way to make sure both have solid plumbing for years.

• Historic Districts (HPRB): Expect extra time for review and possible rules on materials. We can help with the process.
• Rental Properties (BBL/TOPA): We provide the right paperwork for landlords and schedule work to cause minimal tenant disruption.
• Lead Service Lines (Lead Free DC): If you have lead service lines, replacing them during a repipe is a good move. We can help you work with programs like Lead Free DC.
• Accessory Dwelling Units (ADUs): We design and install plumbing for new ADUs, tying them into the main house or city services correctly.
• Disclaimer: This is general information, not legal advice. Check with the proper DC or Virginia agencies for current rules.

Is Repiping Worth It?

Yes. If your plumbing is failing, repiping the house is worth it. A planned repipe costs a lot less than cleaning up after a major pipe burst. That kind of disaster means paying for water damage cleanup, mold removal, and replacing floors, drywall, and furniture. A big water damage claim with your insurance can run into the tens of thousands, and it can make your rates go up or even get your policy canceled.

Besides avoiding a disaster, a repipe just makes your house better to live in. You get good, strong water pressure back, so you can run the dishwasher while someone's in the shower. The water will be clean, without that rusty color or metallic taste from old pipes. It also adds real value to your home. New plumbing is a huge plus for buyers, taking a big worry off the table during an inspection. It can help you sell your house faster and for more money.

• Prevents Major Damage: Avoid the cost and mess of a burst pipe and water damage.
• Better Water Quality: Gets rid of rust, sediment, and metallic tastes in your water.
• Increases Water Pressure: Get strong showers and fast-filling tubs again.
• Ends Constant Repairs: A permanent fix, not another expensive emergency call for a pinhole leak.
• Adds Resale Value: New plumbing is a big selling point for buyers and can increase your home's value.
• Peace of Mind: Stop worrying about your old pipes failing.

How i4improvements Handles Your Repipe

Picking the right contractor for a repipe is a big deal. At i4improvements, we've spent years repiping homes all over Washington D.C., Arlington, Alexandria, and the surrounding counties. We're licensed and insured in DC and Virginia. Our owner, Sharma, leads the team and stands behind our work. Our 4.9-star Google rating comes from being straight with people, charging fair prices, and doing professional work on every job, whether it's a small condo or a big historic house.

We do more than just replace pipes. We'll help you pick the right materials, handle the permits, and plan the job to keep your family's life as normal as possible. We have a 24/7 emergency dispatch because pipes don't burst on a schedule, and we bring that same sense of purpose to our planned jobs. If you're fed up with old galvanized pipes or just planning ahead, we have the local experience to do the job right.

• For a detailed, no-pressure estimate on your whole-house repipe, call our team at i4improvements at (703) 342-8068.