Party wall

A shared wall on the property line between two owners, common in townhouses and city duplexes. Maintenance and repair rules are usually set in a party wall agreement.

Legal & title issues · Updated September 2026

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Part 1 of 4

Why a seller cares

A townhouse or a city duplex shares a wall with the neighbor, and a party wall agreement says who maintains it and how. A buyer's lender may ask for the agreement, and a missing one is a title exception.

Part 2 of 4

A simple example

Your townhouse shares its east wall with the neighbor. The recorded party wall agreement covers repairs, and the buyer's lender wants a copy.

Party wall: a simple example
What existsWhat follows
A recorded party wall agreementA copy for the buyer; nothing more
No agreement on recordThe title policy carries an exception, and some lenders want one drafted
A dispute with the neighbor about the wallA material fact to disclose

A shared wall is a shared duty, and the agreement is where it is written.

Part 3 of 4

What people get wrong

That the wall belongs to whoever built first. A party wall is usually owned to the centerline by each side, with duties to both.

Part 4 of 4 · where to read next

Where it appears in the sale

What a definition is, and what it isn't

Keighbor is a software company, not a law firm, brokerage, or tax adviser. This is general information, not legal, tax, financial, or real estate advice about your sale. Your situation may differ. Before acting on a contract, disclosure, title, tax, or pricing question, ask an appropriately licensed professional in your state.

Written and researched by Keighbor Research · drawn from the reference glossary · how we research and check what we publish

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