Party wall structural review
A structural review of a neighbour's proposed works on behalf of an adjoining owner or their party wall surveyor.
About this service
A party wall notice mentioning steel beams, underpinning or a basement can be worrying. Party wall surveyors deal with the procedure under the Party Wall etc. Act 1996, but they are not always engineers. When the neighbour's structural proposals are complex, the adjoining owner's surveyor often asks a structural engineer to check them. That is the role of this review: an independent engineer's look at what is planned next door and how it could affect your home.
We read the building owner's drawings, calculations and method statements with one question in mind: will this work be safe for the adjoining property? We look at how new beams bear on or into the party wall, whether foundations or underpinning will undermine your footings, how excavations will be supported and how loads are being shared. We then write clear comments and questions for the neighbour's engineer, which your surveyor can use when agreeing the party wall award.
Most reviews in London involve terraced and semi-detached houses, where loft conversions, rear extensions and basements put new loads on or dig close to a shared wall. A good review usually leads to sensible changes on paper rather than arguments on site. If you have not yet had a schedule of condition recorded, it is worth arranging before any work begins.
When you need it
- Your neighbour has served a party wall notice
- Your party wall surveyor needs an engineer to check the proposals
- You're concerned the works could affect your property
What's included
- Review of the neighbour's structural drawings and calculations
- Check of the effect on the party wall and your property
- Comments and questions for the building owner's engineer
How it works
- Receive the documentsYour party wall surveyor, or you directly, send us the notice, architectural drawings, structural calculations and any method statements. We confirm the scope and a fixed fee in writing before we start.
- Check the proposalsWith an understanding of your side of the wall, we check bearings into the party wall, foundation and underpinning details, excavation support, temporary works and sequencing, and look for missing information that the design should cover.
- Issue commentsWe send a written review listing concerns, questions and requested changes, each explained in plain terms so your surveyor can raise them with the building owner's surveyor and engineer.
- Review the responsesWhen revised drawings or answers come back, we check them and confirm whether our points have been closed out, so the award can be agreed with the technical issues resolved.
What you receive
What an engineer looks for in a neighbour's proposals
The details that matter most to an adjoining owner are often small on the drawings. A steel beam pocketed into a party wall needs a padstone that spreads the load without overstressing old brickwork. Underpinning beside your foundations must be dug in short, alternating sections so the wall is never left unsupported. Basement excavations need a clear temporary works scheme. Our guide to steel beams and padstones explains why these details matter.
Remember that the Act sets fixed notice periods, generally two months for work to a party structure and one month for excavations within the distances it defines. That timetable can feel tight once questions start going back and forth, so send the documents to us as soon as your surveyor has them. Our review does not replace the party wall surveyor. We advise on the engineering, and the surveyors decide the award, including who pays for our time.
Not included
- Acting as party wall surveyor
Projects that used this service
Frequently asked questions
Who pays for a structural engineer to review my neighbour's party wall plans?
In most cases the building owner, meaning the neighbour doing the work, pays the reasonable costs of the adjoining owner's surveyor, and that can include a structural engineer's review where it is properly needed. The surveyors decide this in the party wall award. If you instruct us directly before an award is in place, agree with your surveyor how our fee will be treated. Our review starts from £400 + VAT.
Can I object to my neighbour's party wall notice?
You cannot simply block work the Act allows, but you can dissent to the notice. That brings in party wall surveyors, who settle how and when the work is done through an award. A structural review gives your surveyor the technical grounds to ask for safer details, a better sequence or more information. It is the practical way to protect your property rather than refuse the work outright.
What should I check on my neighbour's structural drawings?
Look at anything that bears on, cuts into or digs near the shared wall. That includes steel beams with padstones in the party wall, raising or thickening the wall, underpinning, and new foundations or basements close to your footings. Check there are calculations, not just drawings. If any of this is unclear, an engineer's review is worth having before the award is agreed.
Is a party wall structural review the same as a schedule of condition?
No. A schedule of condition records the state of your property before work starts, with photographs and notes, so any later damage can be identified. A structural review checks whether the neighbour's design is likely to be safe for your building. They do different jobs, and on larger projects such as basements or loft conversions in a terrace it is sensible to have both.