The three checks
Start by asking whether the design involves any of these situations:
- A new wall at the boundary: section 1 covers specified building at the line dividing two owners' land. A wall astride that line and a wall wholly on your side follow different consent rules. [3]
- Work to an existing party wall or party structure: section 2 includes rights such as cutting into, raising or underpinning a qualifying structure, with notice normally served under section 3. [4][5]
- Excavation near another building or structure: section 6 uses both distance and depth tests. Digging within 6m does not automatically require notice. [6]
One project can engage more than one section. For example, a rear extension might involve both a new boundary wall and foundations beside a neighbour's existing extension. Treat those as separate checks rather than assuming one notice covers every operation. [3][6]
What the procedure achieves
The person proposing the work is the building owner. A qualifying owner of the affected property is an adjoining owner. Where the statutory procedure produces a dispute, the owners appoint a surveyor jointly or appoint one each; the dispute is then settled through an award. This provides a way to regulate qualifying work rather than giving either side an unrestricted veto. [7][8]
The award may address the right to carry out the work, its timing and method, safeguards and reasonable costs. It does not turn a proposal outside the Act into work that the Act authorises. [8]
What it does not replace
Planning permission and building regulations approval remain separate. Permission from the council is not your neighbour's written consent under the Act, and a party wall award is not building-control sign-off. Private rights, including rights of light, also need separate consideration. [9]
The Act is not a general system for determining the ownership of a disputed strip of land. Where the design depends on an uncertain boundary, resolve that issue using the title evidence and appropriate boundary advice before assuming the wall can be placed there. [10]
A useful starting pack
Ask your designer to identify the proposed walls, beam bearings, excavation lines and foundation levels on coordinated drawings. Check who owns each potentially affected property, including relevant leasehold interests, and distinguish the drawings used for neighbour discussions from the documents intended for formal notices. These steps make the statutory tests and notice requirements easier to apply. [5][6][7]
Minor work does not automatically require notice: government guidance gives ordinary shelving and replastering as examples outside the notification process. The important question is what the work actually does to the structure. Borderline cases need project-specific advice before work starts. [11]