My Neighbour Started Building Without Serving a Party Wall Notice – What Happens Now?

Discovering that a neighbour has started building works close to your property can be worrying, particularly if you have never received any formal notice beforehand. This situation arises more often than many people realise and usually occurs because the person carrying out the work is simply unaware of their obligations under the Party Wall etc. Act 1996.

The good news is that even if works have already begun, there are still practical ways the situation can be addressed.

When Should a Party Wall Notice Be Served?

The Act requires a building owner to formally notify adjoining owners before undertaking certain types of work that may affect neighbouring property.

Typical examples include:

• Cutting into a party wall to insert steel beams (often required for loft conversions).

• Raising, thickening or demolishing a party wall.

• Building on or astride the boundary line.

• Excavating near neighbouring foundations, which commonly occurs with rear extensions.

In most cases, notice should be served at least one or two months before the work begins, depending on the type of work involved.

What If Work Has Already Started?

If work has commenced without the required notice, technically the building owner has not followed the correct procedure under the Act. However, this does not automatically mean the work must stop permanently.

In practice, the situation is usually resolved by retrospectively invoking the Act and appointing surveyors to deal with the matter properly.

The surveyors will typically:

• Review the works that have taken place.

• Record the current condition of the neighbouring property.

• Assess whether any damage has occurred.

• Produce a formal Party Wall Award setting out how the works should proceed.

This process provides protection to both parties and helps prevent disputes later on.

Can the Works Be Stopped?

In some circumstances, an adjoining owner may seek an injunction through the courts if works are proceeding without notice and there is a risk of damage. However, court action is usually a last resort.

Most situations are resolved more efficiently by surveyors appointed under the Act, who can regulate the works and ensure safeguards are put in place.

Why the Act Exists

The purpose of the Party Wall legislation is not to prevent development. Instead, it provides a structured framework so that building works affecting shared or neighbouring structures are carried out responsibly.

It protects:

• The building owner, by allowing works to proceed lawfully.

• The adjoining owner, by ensuring their property is properly safeguarded.

A Party Wall Award typically includes details such as the method of construction, working hours, access arrangements and procedures for dealing with any damage.

Early Advice Can Prevent Disputes

Many Party Wall issues arise simply because homeowners or contractors are unaware of the legal requirements. Seeking advice early can avoid delays and help maintain good relations between neighbours.

If you are planning works that may fall within the scope of the Party Wall Act, or if neighbouring works have already begun and you are unsure where you stand, it is often sensible to obtain professional guidance at an early stage.

For further information about how the Party Wall process works, please see our dedicated page on Party Wall Surveyor services.