Can AI check work against building regs and standards?

AI can help you check work against building regs, but it can't confirm compliance. It's good at pointing you to the right Approved Document, listing what a spec has missed and catching sums that don't add up. It can quote an out-of-date edition or invent a requirement. Compliance is signed off by building control or a competent person scheme, and you stay responsible.

Who is responsible for building regs compliance?

You are, not the software. GOV.UK says the person doing the work can be prosecuted and fined if it doesn't comply, and the building control body can make you pay to put faulty work right. Since the 2023 changes in England, contractors also have a duty to make sure the building work they and the people they manage carry out complies with all relevant requirements, and must refuse work beyond their competence.

An AI answer can help you get there. It isn't evidence of compliance, and no building control officer will accept "ChatGPT said it was fine".

What can AI do well with building regs?

AI is useful where the job is reading, sorting and arithmetic, and you check the result.

If you're checking a spec before you price, see checking a spec against building regs before you price.

Where does AI get building regs wrong?

Three ways come up again and again.

Old editions. Approved Documents are revised. GOV.UK lists an update to Approved Document B on 16 September 2026 adding guidance on second staircases and evacuation lifts in taller residential buildings, and 2026 editions of Approved Document L alongside the 2021 edition, with earlier versions still applying to buildings under the previous standards. An AI trained before those changes won't know them unless it reads the current document.

Invented specifics. Asked for a figure it doesn't have, an AI chat tool may produce a plausible one with no source. A property developer who had used paid ChatGPT for 18 months told us they'd "noticed hallucinations".

Wrong country. Most AI answers default to England. GOV.UK's approval guidance covers England and sends readers in Scotland and Northern Ireland to their own building standards sites; Wales sets its own rules too. Always say where the job is.

Can you rely on this AI answer?

How do you ask AI a regs question properly?

Make it show its sources so you can check them in minutes. This prompt works in ChatGPT, Claude or Copilot; paid plans can read a PDF of the Approved Document if you upload it, which is safer than relying on what it remembers.

I'm a trade pricing work in England / Wales / Scotland / Northern Ireland on a house / flat / commercial building, number of storeys.
Here is the spec: paste spec or attach PDF.
List anything in it that may not meet the building regulations, or that the spec doesn't mention but should.
For every point, give the Approved Document (or the equivalent for that country), its edition, and the paragraph number.
If you're not sure of the paragraph, say "not sure" instead of guessing.
Don't tell me the work complies. I will check each point myself.

What does a real catch look like?

The most useful checks are often sums and product details rather than the regulations themselves. A roofing and cladding firm in Ireland with eight workers had a flat-roof insulation quote where the AI flagged an adhesive that wasn't compliant for use on XPS board, and corrected the board coverage from 0.75 m² to 1.44 m² per board.

The adhesive point is the kind to check with the manufacturer's data sheet: compatibility with an insulation board is a product question, and the data sheet is the source. See wind uplift and fixings for roofing and cladding for the fixings side.

What should you check yourself every time?

Common questions