Party Wall for Building Owners

The Party Wall etc. Act 1996 governs building work that affects shared boundaries with neighbouring properties. It applies in three main situations:

Work to a party wall

A party wall sits on the boundary between two properties, with both owners having rights to it. If you’re cutting into, raising, rebuilding, or altering a party wall, you need to serve notice on your neighbour. Notices served incorrectly cause delay and disputes — talk to us before you serve.

Work near adjacent buildings

If you’re excavating or building foundations within 3 metres of a neighbour’s building (or 6 metres if deep foundations are involved), and the work goes below their foundation level, you need to serve notice.

Building on the boundary

If you’re constructing a new wall on or at the boundary line — not just adjacent to it, but actually on the line — you need to serve notice.

The Act exists to balance your right to develop your property against your neighbour’s right to protection from damage. Following it properly protects everyone.

Legal compliance

You cannot lawfully carry out notifiable work without following the Act’s procedures. Proceeding without proper notices exposes you to injunctions, delays, and liability for any damage caused.

Neighbour relationships

Building work already tests neighbourly relations. Following the Act properly — with clear notices, proper explanation, and fair treatment — maintains relationships that matter long after the project ends.

Evidence protection

The Act’s procedures create records of your neighbour’s property condition before work starts. If they later claim your work caused damage, you have evidence of pre-existing conditions.

Project scheduling

The Act’s notice periods (typically one to two months) affect your project timeline. Understanding the process lets you plan properly, serving notices early enough that consents or awards are in place when you need to start work.

The Act creates specific roles:

Building Owner — You, the person doing the work. You have obligations under the Act but also the right to carry out the work once proper procedures are followed.

Adjoining Owner — Your neighbour(s) whose property shares a boundary with yours. They have rights to protection and to participate in the process.

Surveyors — Professionals appointed to resolve disputes. The building owner appoints their surveyor; the adjoining owner appoints theirs. The two surveyors work together to make an award, selecting a third surveyor if they can’t agree.

Agreed Surveyor — A single surveyor acting for both parties. More efficient than two surveyors, but only possible if both parties agree to appoint the same person.

We typically act as your appointed surveyor, working with whoever the adjoining owner appoints (or as agreed surveyor if both parties prefer).

Extensions

Most extensions trigger party wall notices — either work to shared walls or excavation near neighbours’ foundations. The notice type depends on exactly what you’re building and where.

Loft conversions

If your loft conversion involves cutting into a party wall (for beams, flues, or connections), you’ll need Section 3 notices. The structural work often affects shared elements.

Basement excavations

Almost always require Section 6 notices due to excavation depth and proximity to neighbours’ foundations. Often require Section 3 notices too if underpinning or other work affects party walls.

Refurbishments

Major refurbishments can trigger notices if they involve party wall alterations, chimney removal from party walls, or structural work affecting shared elements.

New builds

Building on previously undeveloped land may require Section 1 notices if you’re building on or at the boundary line.

The Act sets minimum notice periods:

• Section 1 notices (new walls on boundary): 1 month before starting work
• Section 3 notices (party wall work): 2 months before starting work
• Section 6 notices (excavation): 1 month before starting work

If the adjoining owner consents, you can start immediately. If they dissent, add time for the award process — typically 4-8 weeks for a straightforward award, longer for complex cases.

Plan accordingly. Serving notices early keeps your project on schedule.

The building owner generally pays the costs of the party wall process, including:

• Your own surveyor’s fees
• The adjoining owner’s surveyor’s fees (in most cases)
• The agreed surveyor’s fees (if one is appointed)

This is the Act’s default position — the person doing the work pays for the protection of the person affected. There are exceptions for certain types of work, but plan on covering the full cost as a project expense.

We provide clear fee quotations based on the scope of notices required.

Sometimes adjoining owners are uncooperative — not responding to notices, making unreasonable demands, or appointing surveyors who obstruct progress.

The Act has mechanisms for this:

• Deemed dissent after 14 days allows the process to continue
• The surveyor appointment process proceeds regardless of cooperation
• Awards can be made even without active adjoining owner participation
• A third surveyor can resolve deadlock between the two appointed surveyors

We’ve handled difficult neighbours before. The Act’s procedures work even when people don’t.

If defects arise:

• Building Pathology & Defect Analysis — Investigating alleged damage from building work

For access to neighbouring land:

• Scaffold Licences & Access Agreements — If you need to access neighbours’ property for your works