Party walls and boundaries

What should you ask if a loft conversion beam appears to bear on a shared wall?

Ask whether the bearing was seen, and do not assume notice was given. A beam into a party wall is exactly the sort of work GOV.UK says can fall under the Act in England and Wales. The home survey may see a beam end, a boxed pier or only a bedroom. It cannot see the neighbour’s side, and it cannot confirm an award existed.

Last reviewed 24 October 2026. Written for buyers in England and Wales unless this answer says otherwise. No named surveyor has signed this page. It is general guidance, not a report on your house, and not legal advice.

What is the fuller explanation?

Building-regulations paperwork for the conversion is the companion question. Structure, fire separation and stairs may all have needed approval. The survey describes what is visible now: cracks, sagging, roof alterations. Missing papers are for the solicitor. An indemnity policy does not check the bearing.

If you plan further work, the notice window is still two months to a year before you start, not a sentence in the old completion certificate. There is no RICS price for opening a boxed beam. If the rating says the structure is unclear, ask an engineer what they need to see before you negotiate a figure.

What should you ask your surveyor?

Could you see the beam bearing, or only the plaster?
Is the wall shared, as far as the inspection can tell?
Which papers should the solicitor ask for: regulations, planning, an award?

What are the typical next steps?

Do not knock the boxing off before exchange.
Separate missing consent from actual movement. You may have one, the other, both, or neither.
If you need the bearing checked, instruct someone who will open it, and agree the scope in writing.

Costs vary with the building and with who you instruct. Where this page does not cite a published figure, ask the surveyor, a relevant specialist, or your solicitor for a written quote. Do not treat a forum average as the price.

Also asked about this

Is a steel called a goalpost always on the party wall?

No. Some beams sit on piers inside one house. The survey should say if it could not see the ends.

Does a building-control certificate prove the neighbour agreed?

No. Building regulations and the Party Wall etc. Act are separate. GOV.UK says so.