Why doors are worth surveying separately
A general building survey covers structure, services and finishes — it does not cover door hardware in any meaningful detail. The surveyor will note "door operates" or "needs maintenance"; they will not tell you the floor spring has weeks left, the fire door is non-compliant, or the panic hardware is invalidated by a previous unauthorised modification. Those are specialist engineer judgments.
And doors are where compliance failures cluster on commercial premises. The Fire Safety Order applies. PUWER 1998 applies to powered doors. BS EN 16005 applies to automatic doors. BS EN 1125 / 179 to panic hardware. A pre-acquisition survey establishes what is compliant, what isn't, and what the remediation cost is.
What a survey covers
Every external entrance and exit: material, condition, closer / floor spring / transom condition, hinge or pivot wear, frame and threshold, weather seal condition, glazing.
Every fire door: intumescent strips and smoke seals present and intact, certification marks visible, gap measurements within 3 mm tolerance, hinges to BS EN 1935 rating, closer self-closing positively, signage present.
Every emergency exit: panic hardware function, BS EN 1125 / 179 spec match for the door's use, hardware CE / UKCA marked, no overrides or invalidating modifications.
Every automatic door: sensor coverage, opening and closing speeds, safety force test, BS EN 16005 compliance status, age of controller and motor, emergency manual override function.
Every roller shutter / industrial door: safety brake function, photocell function, manual override, PUWER 1998 inspection history.
Every secure door (insurer-graded): lock specification, certification, frame integrity, downgrades or substitutions since original installation.
How to use the survey output
The survey produces a written report listing each door, its condition, any compliance gaps, and an indicative cost to remediate. Items are grouped by urgency: immediate (compliance breach), within 12 months (end of life nearing), within 3–5 years (preventative).
For a freehold purchase, the report supports a price reduction equal to the immediate-action total. Vendors expect this on building condition; they should expect it on doors too.
For a leasehold, the report supports either: (a) a landlord remediation schedule completed before the lease starts, or (b) a tenant-side photograph and condition record that protects against dilapidations claims at lease end. The tenant's solicitor will use this in the schedule of condition negotiation.
When to commission the survey
After heads of terms, before exchange of contracts. The survey output then sits alongside the building survey and informs the legal and pricing negotiation. Surveying earlier (pre-heads) is wasteful if the deal doesn't proceed; surveying later (post-exchange) means you own the problems.
For complex multi-building sites we can spread the survey across two or three visits and run alongside the general survey.
What the survey doesn't cover
A pre-acquisition survey is not a full fire risk assessment — that is a separate process the Responsible Person commissions after taking occupation. It is also not a structural assessment of frames or walls. We flag obvious frame issues but a structural engineer would need to follow up where remedial structural work is implied.
And it does not predict every future failure — a healthy door today can still break next month. What it does is capture today's known condition so the buyer is making a properly informed decision.