A party wall agreement is a legal document that is drawn up between the owners of adjoining properties that share a common boundary. The document sets out the rights and responsibilities of each party with regard to the common wall, including the maintenance and repair of the wall.

However, if one of the party wall owners decides to sell their property, there may be a need to amend the party wall agreement to reflect the change of ownership. This is because the new owner will have different responsibilities and obligations under the agreement.

The process of changing a party wall agreement can be complex, and it is important that both parties seek legal advice to ensure that they are fully aware of their rights and obligations. In general, the process will involve the following steps:

1. Identify the need for the change: The party wall owner who is selling their property should inform the other party of their intention to do so. This will help to identify any potential issues that may arise as a result of the change in ownership.

2. Amend the agreement: The party wall agreement will need to be amended to reflect the new ownership. This may include changes to the maintenance and repair responsibilities, as well as any other obligations that may be affected by the change.

3. Serve notice: Once the agreement has been amended, both parties will need to serve notice on each other to confirm that the change has been made and that both parties agree to the new terms.

4. Register the agreement: The amended party wall agreement will need to be registered with the relevant authorities to ensure that it is legally binding and enforceable.

In conclusion, if you are a party wall owner who is considering selling your property, it is important to be aware of the need to change the party wall agreement to reflect the change in ownership. Seeking legal advice and following the proper procedures will help to ensure that the process is handled correctly and that both parties are fully aware of their rights and obligations.