How Much to Repipe a Triple Decker in Boston, MA?

If you own or manage a classic Boston triple-decker, you’ve probably heard the telltale signs of aging pipes—low water pressure, discolored water, or even mysterious leaks behind walls. Knowing how much to repipe plumbing triple decker in Boston MA can feel overwhelming, especially with historic homes that often hide outdated galvanized or lead pipes. You’re not alone—and you’re smart to seek clarity before diving into this major renovation. In this guide, we’ll break down realistic costs, timelines, materials, and key considerations tailored specifically to Boston’s unique housing stock.

Why Do Boston Triple Deckers Often Need Repiping?

Boston’s iconic triple-deckers—three-story wood-frame apartment buildings built mostly between 1870 and 1930—were originally plumbed with galvanized steel or even lead pipes. Over time, these corrode, restrict water flow, and can leach harmful metals into your water supply.

According to the EPA, homes built before 1986 are more likely to have lead pipes or fixtures. While Boston banned lead service lines in the 1980s, many older triple-deckers still contain remnants.

“In over 60% of the triple-deckers we inspect in Dorchester and Jamaica Plain, we find partial galvanized systems that need full replacement,” says Michael Tran, licensed master plumber with Boston Pipe Solutions (2024 field report).

How Much Does It Cost to Repipe a Triple Decker in Boston?

The average cost to fully repipe a Boston triple-decker ranges from $25,000 to $65,000, depending on several factors:

Real-World Example:

In 2025, a landlord in Roxbury repiped a 3,200 sq ft triple-decker using PEX piping. Total cost: $38,500, including permits, labor, drywall repair, and city inspection. The job took 12 days with a crew of 4.

💡 Pro Tip: PEX (cross-linked polyethylene) is now the most common choice for Boston repiping due to its flexibility, freeze resistance, and lower cost vs. copper. Learn more about PEX piping on Wikipedia.

What Factors Drive Up Repiping Costs in Boston?

Not all triple-deckers are created equal. Here’s what can spike your bill:

1. Lead Abatement Requirements
   If lead pipes are found, Massachusetts law requires certified abatement—not just removal. This can add $2,000–$7,000.
2. Historic District Restrictions
   Homes in districts like Back Bay or South End may face stricter rules on exterior modifications (e.g., rerouting main lines).
3. Shared Plumbing Systems
   Many triple-deckers use a single vertical stack. Replacing it often means tearing into multiple units simultaneously—increasing coordination and labor costs.
4. Drywall & Finish Repair
   Accessing pipes usually means cutting walls. Restoring plaster (common in pre-1940s homes) costs more than standard drywall.

Step-by-Step: What to Expect During a Triple-Decker Repipe

Here’s a realistic timeline and process for a full repipe in Boston:

1. Inspection & Quote (1–3 days)
   A licensed plumber performs a camera inspection and pressure test. Get at least 3 written estimates.
2. Permit Application (3–7 days)
   Submit plans to Boston Inspectional Services Department (ISD). Required by law—don’t skip this!
3. Material Selection
   Choose between:
   • PEX-A (best for freezing climates, expandable)
   • Copper Type L (durable but expensive)
   • Avoid CPVC in cold climates—it’s prone to cracking.
4. Demolition & Installation (7–14 days)
   Crew cuts access panels, removes old pipes, installs new mains and branch lines. Work typically starts in the basement and moves upward.
5. City Inspection
   Boston requires a rough-in inspection before walls are closed, and a final inspection after completion.
6. Wall Repair & Painting (3–5 days)
   Hire a contractor experienced in historic homes for seamless patching.

⚠️ Warning: Never hire an unlicensed plumber. In Massachusetts, plumbing work without a license is illegal and voids insurance claims. Verify licenses at Mass.gov’s eLicensing portal.

PEX vs. Copper: Which Is Best for Boston Triple-Deckers?

For most Boston landlords and homeowners, PEX is the smart choice—especially given New England’s harsh winters and budget constraints.

How to Save Money Without Sacrificing Quality

• Bundle with Other Renos: If you’re updating kitchens or bathrooms, do plumbing at the same time to avoid double demolition.
• Ask About Phased Repiping: Replace one unit at a time if cash flow is tight (though less efficient long-term).
• Check for Grants: Boston’s HomeWorks Program offers low-interest loans for health-related repairs (including lead pipe removal) for income-qualified owners.
• Get Multiple Quotes: Prices vary widely. One 2025 study found a 32% difference between the highest and lowest bids for identical jobs.

FAQ Section

Q1: How long does it take to repipe a triple-decker in Boston?

A: Most full repipes take 10–18 days, depending on crew size, material choice, and whether walls are open or finished. Occupied units may require temporary water shutoffs.

Q2: Do I need to move tenants out during repiping?

A: Not always—but it’s disruptive. Many landlords offer $50–$100/day stipends or temporary hotel stays. Plan work during lease turnovers when possible.

Q3: Will my insurance cover repiping?

A: No, unless it’s due to a sudden, covered event (like a burst pipe). Routine repiping is considered maintenance and is the owner’s responsibility.

Q4: Can I just replace part of the plumbing?

A: Partial repiping is possible but not recommended if you have galvanized pipes. Corrosion is systemic—replacing only one section often leads to leaks at transition points.

Q5: Are there financing options for Boston landlords?

A: Yes. Besides HomeWorks, banks like Eastern Bank and Webster Five Cents Savings offer property improvement loans. Some contractors also offer in-house financing.

Q6: How do I know if my triple-decker has lead pipes?

A: Check the pipe entering your basement from the street. Lead is dull gray, soft (scratches easily with a key), and non-magnetic. When in doubt, get a water test from a MassDEP-certified lab.

Conclusion

Understanding how much to repipe plumbing triple decker in Boston MA isn’t just about getting a number—it’s about protecting your investment, ensuring tenant safety, and preserving a piece of Boston’s architectural heritage. With costs ranging from $25K to $65K, planning ahead, choosing the right materials (like PEX), and hiring licensed professionals make all the difference.

If this guide helped you navigate your repiping decision, share it with fellow Boston landlords or homeowners on Facebook, Nextdoor, or X! Got questions? Drop them in the comments—we’re here to help.

Your triple-decker deserves safe, reliable plumbing. Don’t wait for a leak to force your hand. 💧🏠