If you’re planning an extension, loft conversion or basement conversion and your property shares walls with a neighbour, you almost certainly need to navigate the Party Wall etc. Act 1996. This guide explains party wall agreements (formally called Party Wall Awards) from start to finish.
What Is a Party Wall Agreement?
A Party Wall Award is a legally binding document prepared by one or two party wall surveyors. It sets out: the manner in which the notifiable works will be carried out; the hours during which the works may be executed; protection measures for the neighbouring property; and any compensation payable for damage caused. It is agreed before works begin and protects both the building owner and the adjoining owner.
When Is a Party Wall Agreement Required?
A Party Wall Award is required whenever a party wall dispute is deemed to exist — which happens automatically if a neighbour dissents to your notice, or fails to respond within 14 days. It is not required if your neighbour consents in writing — but even then, it is good practice to record the works and the condition of the neighbour’s property before starting.
The Party Wall Notice
You must serve written notice on all adjoining owners before starting notifiable works. Notice periods are: one month for Section 1 works (new wall on boundary); two months for Section 2 works (works to party walls); and one month for Section 6 works (excavations near neighbouring structures). Notices must include specific information — your name and address, the address of the property, a description and drawings of the works, and the proposed start date.
Agreed Surveyor vs Separate Surveyors
If both parties agree, a single “agreed surveyor” can act impartially for both. This is usually cheaper (one fee instead of two) and faster. If the parties cannot agree on a joint surveyor, each appoints their own — the building owner typically pays both fees. The two surveyors must then work together to reach an Award; if they cannot agree, a third surveyor resolves the dispute.
The Schedule of Condition
Before any works begin, the surveyor(s) will prepare a Schedule of Condition — a photographic and written record of the neighbouring property’s current state. This is your protection against false damage claims, and your neighbour’s protection against genuine damage going uncompensated.