Philadelphia Row Home Leaks: Roofs and Walls

By Ishaq Hassan. Updated October 4, 2026. 3 min read.

Short answer: Philadelphia row homes share walls and often have flat roofs, so leaks can start on a neighbor’s roof or at the seam between houses. Keep flat roofs coated and drains clear, check parapet walls and flashing, keep basement drains working, and talk with neighbors about shared roof and wall repairs. Report sewer and street drain problems to the Philadelphia Water Department.

Philadelphia has more row homes than almost any US city. They share walls, roof lines and sometimes problems. This guide covers the most common Philadelphia row home leaks and how to handle them.

Common leak sources

Flat roofs with worn coatings, open seams or ponding water
Flashing where the roof meets parapet walls and neighbors’ roofs
Chimneys and skylights
Old brick walls with worn mortar
Basement leaks from old sewer lines and floor drains
Leaks from a neighbor’s plumbing through a shared wall

Illustration of a brown water stain spreading across a ceiling with water dripping below — A ceiling stain usually means water is trapped above. Drips are a sign it is getting worse.

Flat roof care

Have the roof coated or checked every few years
Clear roof drains and gutters
Look for ponding water that stays more than a day or two after rain
Check seams and flashing after storms

Read flat roof problems.

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Shared walls and neighbors

When a leak comes from a shared roof or wall, talk with your neighbor early, and share photos. A roofer or plumber can find where water enters. Repairs to shared seams often work best when both owners agree on one contractor. Keep records in case insurance is involved.

Illustration of wood floor planks cupping and warping around a pool of water — Wood floors cup and buckle as they soak up water from below.

Basements and sewers

Older row homes can have basement backups during heavy storms. The Philadelphia Water Department has offered a Basement Backup Protection Program for eligible homeowners, which may include backwater valves. Ask the department about current eligibility. Permits for major work come from the Department of Licenses and Inspections, and contractors must be licensed with the city.

Illustration of a flooded basement with water covering the stairs and boxes floating — Basement flooding often follows heavy rain or a failed sump pump.

Read what causes a sewer backup and signs of hidden water damage.

Local help in Philadelphia

Illustration of a burst pipe spraying water into a living room with a flooded floor — Water damage from a burst pipe spreads fast across floors and into walls.

Quick answers: philadelphia row home

Why does my Philadelphia row home leak?

Flat roof wear, flashing at shared walls, old mortar and basement drains are common causes.

Who pays when a leak comes from my neighbor's roof?

It depends on where the leak starts and your agreements. Talk early and document everything.

How often should a flat roof be coated?

Every few years, depending on the coating and condition. Have it checked after storms.

Does the city help with basement backups?

The Philadelphia Water Department has offered a Basement Backup Protection Program for eligible homeowners. Ask about current eligibility.

Who fixes leaks in Philadelphia row homes?

Sifixit can connect you with local water damage and roofing providers.

This guide covered philadelphia row home. For more background, see FEMA’s flood insurance pages, and if you need help, Sifixit can connect you with a local provider.

This guide is general information for homeowners, not professional, insurance or safety advice for your situation.

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