RICS Regulated · London & UK

Dedicated to Clear, Fair and Efficient Party Wall Solutions

Notices drafted and served within 24 hours. Fixed fees agreed in writing upfront. Senior surveyors only — no juniors, no hand-offs, no surprises.

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Regulated by RICSFaculty of Party Wall SurveyorsThe Pyramus & Thisbe Society

The party wall process — what people get wrong

Party wall matters can go sideways fast — disputed awards, delays to your build, and costs that spiral when the wrong surveyor is involved. This video walks through the most common mistakes homeowners make, so you know exactly what to look for before you appoint anyone.

Trusted by businesses across the industry

  • BH Projects Group
  • AG ArchiStructure
  • North Home Design
  • JND² Designs
  • Arcadia-Designs
  • BH Projects Group
  • AG ArchiStructure
  • North Home Design
  • JND² Designs
  • Arcadia-Designs

What is the Party Wall Act?

The Party Wall etc. Act 1996 is the piece of legislation that governs building works affecting a shared boundary in England and Wales. It exists to let owners carry out legitimate works to their own property while protecting the neighbour next door from damage, disruption, or nasty surprises.

In practice, it covers the walls, floors and boundary structures you share with an adjoining owner — plus any excavation deep enough to affect their foundations. Before those works start, a formal notice has to be served and, if the neighbour dissents, a surveyor's Award sets out exactly what can be done, when, and who pays for what.

The Act applies across England and Wales to any works on or near a shared structure — most commonly the wall between semi-detached or terraced homes, garden boundary walls built astride the line, and excavations within three or six metres of a neighbouring building. It sets out who must be notified, how much notice is required (two months for works to the wall itself, one month for excavations), and the procedure for resolving disagreements without recourse to the courts.

For a fuller walk-through — what counts as party wall work, how the process feels from both sides, and the pitfalls we see most often — read the full guide on our blog.

Cross-section diagram of two adjoining houses meeting at the boundary line, showing the shared party wall between them.
Diagram showing a party wall.
Illustrated cross-section of two adjoining homes divided by a party wall along the boundary line.
Rooms on either side of the boundary line.

Which kind of works fall under the act?

A newly built brick boundary wall between two London gardens at golden hour
01 / 05

Rear, side & wraparound extensions

Rear extensions, side returns and wraparounds almost always involve the shared wall — building a new flank wall right on the boundary, cutting into the party wall, or excavating new foundations next to next door. If your builder is touching the party wall, coming up to it, or digging near it, the Act applies.

Trigger
Work touching the shared wall, sitting on the boundary, or involving excavations nearby
  • Rear & side-return extensions
  • Wraparound extensions
  • New flank walls on the boundary
  • Excavations & foundations

About us.

A decade of party wall work, all handled in-house. 

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What people say about working with us.

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J
Jan Mazierski
3 months ago
I had a great experience with MG Party Wall Experts. From start to finish, they were professional, knowledgeable, and very easy to deal with. They explained the whole party wall process clearly and made what could have been a stressful situation feel straightforward and well-managed. I would highly recommend MG Party Wall Experts to anyone needing a reliable and efficient party wall surveyor.