Faulkners Surveyors Cardiff

If you’re planning to undertake construction work on a shared boundary with your neighbour, you might need a party wall agreement.

It’s a legal document that outlines the responsibilities and rights of both parties involved in the construction process.


Does Your Neighbour's Extension Need a Party Wall Agreement?

If your neighbour is planning to extend their property in Cardiff, you may be wondering if they need a party wall agreement. Here’s everything you need to know about party wall agreements, including when they’re required and how they affect you.

Understanding Party Wall Agreements

A party wall agreement is a legally binding document between two or more neighbouring property owners in Cardiff that outlines their rights and responsibilities concerning a shared wall or boundary. It covers work on or near the wall, including construction, repair, and maintenance, as well as any damage that may occur during the works.

Does Your Neighbor’s Extension Need a Party Wall Agreement?

If your neighbour’s extension work involves building on or near a shared wall or boundary, they’ll need to obtain a party wall agreement. Examples of extension work that may require a party wall agreement include:

  • Building a new wall next to or astride the boundary
  • Excavating within three meters of a neighboring building’s foundation
  • Cutting into a shared wall to insert beams or joists
  • Demolishing and rebuilding a shared wall

Advantages of a Party Wall Agreement

Even if a party wall agreement isn’t legally required in some cases, it’s still a good idea to have one in place. Here are some of the benefits of a party wall agreement:

  • Clarifies the extent of the work to be carried out
  • Defines the responsibilities of each party
  • Protects your property against potential damage during construction
  • Minimizes the risk of disputes and legal complications with your neighbor

How to Know if Your Neighbour Has a Party Wall Agreement

If your neighbour in Cardiff intends to carry out work that affects a shared wall or boundary, they’re legally obligated to inform you. If they’re required to obtain a party wall agreement, they must serve you with written notice. This notice should include details of the proposed works and their estimated start date, along with plans and drawings of the works.


If your neighbor is planning an extension that may affect a shared wall or boundary, they may need a party wall agreement. At Faulkners in Cardiff, we offer a range of surveying services, including party wall agreements. Contact us today to learn more about how we can help you and your neighbor get a party wall agreement in place and ensure a smooth and stress-free construction process.