Legal or procedural basis
Potentially sections 1, 2 and 6 depending on design and site relationships.
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Extensions
Party wall reviews for rear, side-return and wraparound extensions, including new walls and foundations.
Service overview
What this service covers.
Homeowners, architects and contractors planning domestic extensions.
Rear, side-return and wraparound extensions can engage sections 1, 2 and 6 in different combinations. Boundary position, new wall location, beam bearings and foundation depth should be reviewed together rather than as separate afterthoughts.
When this service may be relevant
- A wall will be built on or close to a boundary.
- Steelwork will be cut into a shared wall.
- New foundations are close to and deeper than neighbouring foundations.
Who this is for
Homeowners, architects and contractors planning domestic extensions.
How the instruction is approached
A clear route, matched to the facts.
The Act’s requirements and any boundary procedure depend on the actual documents, ownership and site relationships. These are the usual working stages.
- 01
Check the facts
Review the drawings, ownership interests, neighbouring structures and intended start date before deciding which notice route is relevant.
- 02
Prepare the documents
Describe the work accurately, attach the information required for that notice type and identify every owner who may need to be notified.
- 03
Serve and record
Serve the notice by an authorised method, retain evidence of service and track the statutory response and notice periods.
Questions about Extensions
Useful context before you instruct.
General information only. Advice on a particular property requires the relevant documents and facts.
01Does every extension need a Party Wall notice?
No. It depends on the actual wall, structure, boundary and excavation relationships. A drawing and site review should decide the route.
02When should the review happen?
Before construction pricing and start dates are fixed. Early review leaves time for the correct one- or two-month notice period and any Award.
Authoritative references
Further reading
These public sources support the general explanations on this page. They do not replace advice on the facts of a particular property.
Extensions
Request an assessment or call back.
Describe the work, notice or concern and tell us which drawings or documents you already have. You do not need to decide the statutory route before contacting the team.
Call 020 8050 0443