Retrospective Agreements

What is a Retrospective Agreement?

A retrospective party wall agreement is used when construction or renovation work that affects a party wall or boundary has already started—or has even been completed—without first following the procedures set out in the Party Wall etc. Act 1996.

While this situation is more common than many people realise, it can still be resolved. The building owner and the adjoining owner(s) can work together to formalise the necessary documentation after the work has begun. This is known as a retrospective party wall agreement, and it provides a structured, professional way to regularise the works and protect both parties moving forward.

Creating a retrospective agreement typically follows the same steps as the standard party wall process. This may include issuing the appropriate notices, appointing surveyors if required, and recording the agreed terms relating to the works that have already taken place.

Although acting before the work begins is always the ideal approach, a retrospective agreement can still bring clarity, reassurance and legal structure to the situation. It helps reduce the risk of disputes, ensures each party’s property is properly considered, and provides a clear way forward if any concerns arise.

In some cases, adjoining owners may need additional assurances or adjustments to ensure their property is protected. This is where professional guidance is invaluable—helping both sides reach a balanced, fair and constructive outcome with minimal stress and delay.

If you find yourself in this situation, you are certainly not alone, and solutions are available. For more advice or a fixed-fee quotation, please contact a surveyor who can guide you through the process and help bring the matter to a positive resolution.

The cost of a retrospective agreement will vary depending on the words undertaken, if damage or further disputes have arisen and on location but are the most cost effective way to resolve and formalise matters where the Act was not enabled. Our costs for this service start from £950+VAT

For more advice or a fixed fee quotation, please contact a surveyor.

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