How Much Does a Plumbing Leak Repair Cost? Philadelphia Area

Based on 194 leak repair jobs completed by McCorry Comfort, January 2024–February 2026

Plumbing leaks have a huge range. A dripping compression fitting under a kitchen sink is a $150–$200 fix. A leaking main line behind finished drywall in a Center City rowhome can run several thousand dollars. Here's what our actual job data looks like across 194 repair calls.

Average: $565. Median: $300. Most jobs (middle 50%) land between $160 and $570.

Leak Repair Cost Summary

Metric	Cost
Average	$565
Median	$300
10th percentile	$150
25th percentile	$160
75th percentile	$570
90th percentile	$1,525
Minimum	$150
Maximum	$3,477

Cost by Location

Location	Jobs	Average	Range
Philadelphia	109	$549	$150–$1,525
Bryn Mawr	3	$1,417	$375–$3,477
Huntingdon Valley	2	$1,652	$1,305–$2,000
Glenside	3	$628	$160–$1,500
Montgomery County	6	$729	$160–$1,925
Ambler	3	$481	$300–$695
King of Prussia	2	$388	$300–$475
Elkins Park	4	$312	$160–$655
Rydal	2	$562	$150–$975
Wilmington	4	$331	$150–$600
Norristown	1	$570	—
Bensalem	1	$522	—

Bryn Mawr and Huntingdon Valley average higher — the jobs there involved more extensive pipe runs or older homes with more complex systems. Philadelphia's wide range reflects the diversity of housing stock: from modern construction to century-old rowhomes with mixed piping materials.

What Type of Leak Are You Dealing With?

The type of leak is the biggest driver of final cost. Here's how different leak types typically shake out:

Fixture and Connection Leaks — $150–$350

Dripping faucets, leaking supply lines under sinks, toilet supply connections, shower valve drips. These are single-component fixes — new supply line, washer replacement, valve cartridge swap. Low parts cost, low labor time.

Drain and Trap Leaks — $150–$400

P-trap leaks, drain connection leaks, strainer basket failures. Usually accessible and straightforward. Older galvanized or cast iron drain connections in Philly rowhomes can require more work to clear and seal properly.

Supply Pipe Leaks — $300–$1,200

Leaks at pipe joints, pin-hole leaks in copper, failed shutoff valves. Cost depends heavily on access. A leak at an exposed pipe in a basement is quick. The same leak behind finished walls or under a slab adds significant time and may require drywall work (which we don't include in our quote — that's a separate contractor).

Heating System Leaks — $300–$2,000+

Boiler pipe leaks, baseboard connections, zone valve failures, air separators. Hydronic systems have multiple connection points that fail over time. Older systems with original piping from the 1960s or 70s are more likely to have multiple failure points once one develops.

Slab or Foundation Leaks — $1,500+

These require locating the leak (often with pressure testing), opening the slab or excavating, and re-piping around the failed section. Not common in most Philadelphia-area homes, but they do happen in older slab-on-grade construction. This is the high end of our range.

Philadelphia Rowhomes: What We See Most

If you're in a Philadelphia rowhome — especially pre-1960 construction — your plumbing system has some common failure patterns:

• Galvanized steel supply lines corrode from the inside out. They start leaking at joints first, then the pipe walls themselves. Once you see one galvanized leak, there are usually more coming.
• Lead or cast iron drain lines that have been added to over the years with incompatible connections
• Basement connection points where the main line connects to older clay or cast iron — these joints fail over decades
• Shared wall plumbing where access requires going through finished surfaces

These factors are why Philadelphia leak repairs sometimes run higher than the equivalent job in suburban construction. Access and material compatibility take more time.

Diagnosing First vs. Assuming

We don't walk in and start replacing parts. If the leak source isn't obvious, we pressure-test the system or use listening equipment to locate it before opening anything up. Knowing exactly where the problem is before cutting into walls or ceilings saves time and money — yours.

On 109 Philadelphia jobs, a solid portion required diagnosis before we could even quote the repair. That diagnostic time is factored into the total — you're not billed separately for it.

When Repair vs. Repipe Makes More Sense

If we're repairing a third leak on the same galvanized supply system in 18 months, we're going to have a conversation about repiping. Chasing leaks on failing infrastructure is more expensive over time than replacing the pipe. We'll tell you honestly when we think you're at that point — and we'll explain the math.

Repiping a Philadelphia rowhome in copper or PEX typically runs $3,000–$8,000 depending on size and access. That's a separate conversation from a single repair call, but it's one worth having if your plumbing is 50+ years old and starting to go.

What to Do Before We Arrive

• Locate and shut off the nearest shutoff valve — either under the fixture or at the main
• Know where your main water shutoff is (usually near the meter or where the line enters the house)
• Clear access to the problem area if it's under a sink or in a utility room
• Take a photo of the leak and its location — it helps us come prepared with likely parts

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Got a Leak? Call Us.

We'll diagnose it, tell you what it'll take to fix it, and give you a straight price.

McCorry Comfort
📞 (215) 399-2056
🌐 mccorrycomfort.com
Serving Philadelphia, Montgomery County, Bucks County, Delaware County, and surrounding suburbs