The short answer
A demolition survey is a thorough, intrusive inspection of a building carried out before demolition to identify hazards, above all asbestos, so the work can be planned and done safely. The most important type is the refurbishment and demolition (R&D) asbestos survey described in HSE guidance (HSG264), which is fully intrusive: it accesses parts of the building that a normal management survey would not, because those materials will be disturbed during demolition. The survey locates and records asbestos-containing materials so they can be removed under the correct controls. A broader pre-demolition survey may also record the structure, services and other hazards. The findings feed the demolition plan required under CDM 2015. The survey is general fact-finding, not legal advice on your project.
A demolition survey is the first practical step before any building comes down. The sections below explain what it covers, how the R&D asbestos survey differs from other surveys, and why it matters.
Survey basics
- Main typeRefurbishment & demolition (R&D)
- GuidanceHSE HSG264
- NatureFully intrusive
- FindsAsbestos and other hazards
- WhenBefore demolition begins
The refurbishment and demolition asbestos survey
The core of a demolition survey is the refurbishment and demolition (R&D) asbestos survey, set out in HSE guidance HSG264. Unlike a management survey, which checks the condition of asbestos in a building that will continue in use, an R&D survey is fully intrusive. The surveyor opens up the fabric, behind linings, above ceilings, under floors and into structures, because those materials will be disturbed when the building is demolished and any asbestos must be found before that happens.
The survey locates, samples and records asbestos-containing materials throughout the building, producing a report and often a plan showing where they are. This allows the asbestos to be removed under the correct controls, whether that is licensed or non-licensed work, before structural demolition disturbs it. Because the survey is intrusive, the area surveyed is usually vacated, and the building may need making good if the project does not proceed immediately.
What else a demolition survey can cover
While asbestos is the central concern, a pre-demolition survey can record other things that affect how the building comes down. These may include the structural form (what is load-bearing and how the building is put together), the services present (electricity, gas, water, drainage) that must be isolated, and other hazardous materials or contamination. Some projects also include a pre-demolition audit of materials to plan reuse and recycling.
The combined picture tells the contractor what they are dealing with: where the hazards are, how the structure behaves, and what can be recovered. This is essential input to the written demolition plan required under CDM 2015 and to choosing the right method, hand, machine or a combination. A survey that misses asbestos or misreads the structure can lead to unsafe work, which is why it is treated as a non-negotiable first step.
| Survey element | What it records | Why |
|---|---|---|
| Asbestos (R&D) | All ACMs, intrusively | Remove safely before demolition |
| Structure | Load-bearing form | Plan a safe sequence |
| Services | Utilities present | Isolate before work |
| Materials audit | Recoverable materials | Plan reuse and recycling |
Typical scope of a pre-demolition survey. General guidance only.
Why the survey matters and who does it
The demolition survey exists to prevent harm. Asbestos disturbed during demolition can release fibres that are hazardous to health, and an unsurveyed structure can collapse unexpectedly. By finding the asbestos and understanding the building first, the survey lets the work be planned so neither happens. It also supports the legal duties under CDM 2015 and the asbestos regulations to manage these risks.
Asbestos surveys should be carried out by a competent surveyor, and HSE guidance sets out what a good survey looks like in HSG264. This page is general information about what a demolition survey is, not advice on whether you need one or what the rules require in your case; those questions are best put to a competent surveyor or your local authority. The key point is that a demolition survey, and the R&D asbestos survey at its heart, is the foundation on which safe demolition is built.
Frequently asked questions
What is the difference between a management survey and an R&D survey?
A management survey checks asbestos in a building that stays in use. A refurbishment and demolition (R&D) survey is fully intrusive, opening up the fabric to find asbestos that will be disturbed during work. An R&D survey is the one needed before demolition.
Is a demolition survey a legal requirement?
Managing asbestos and planning demolition safely are legal duties under the asbestos regulations and CDM 2015, and an R&D survey is the standard way to identify asbestos before demolition. This page is general information; check the specific requirements with a competent surveyor or your local authority.
Who carries out a demolition survey?
Asbestos surveys should be done by a competent surveyor following HSE guidance (HSG264). A wider pre-demolition survey of the structure and services is typically arranged through the demolition contractor or a specialist as part of planning the work.
Sources & further reading
Figures on this page are typical UK ranges drawn from published sources and depend on your specific building. They are guidance, not a quotation.