What is an asbestos survey?
An asbestos survey is a structured inspection of a building — or part of a building — by a qualified surveyor whose job is to locate, identify, assess and document every material that might contain asbestos. The output is a written report with photographs, a floor plan annotated with sample locations, sample analysis results from an accredited laboratory, a condition assessment for each material, and recommendations for management or removal.
The goal is not to make aesthetic judgments about the building. It is to answer three questions, definitively: What materials contain asbestos? Where exactly are they? And in what condition? Everything that follows — management plans, removal quotes, risk assessments, site-specific safety plans — depends on the survey being accurate and complete.
The two main types of survey
Most national regulatory frameworks — HSE HSG264 in the UK, INRS INRS ED 6171 in France, INSST in Spain, OSHA in the US — define at least two distinct survey types. They have different purposes and very different costs.
- Management survey — A non-destructive inspection covering all accessible areas of the building. The goal is to locate asbestos-containing materials (ACMs) that could be disturbed during normal use, cleaning or maintenance. Sampling is selective. This is the baseline survey required for day-to-day occupation of a commercial building.
- Refurbishment and demolition survey — A destructive inspection required before any refurbishment, alteration or demolition work that will disturb the fabric of the building. Every area that will be worked on must be accessed, including behind walls, above ceilings and inside service risers. All materials that cannot be proven not to contain asbestos must be sampled.
Never allow a refurbishment or demolition project to start on a management survey alone. The management survey is not designed to find ACMs hidden inside walls, voids or service risers. A refurbishment survey is a legal prerequisite for intrusive works in most jurisdictions.
Who can carry out an asbestos survey?
In most jurisdictions, the surveyor must be a competent professional who meets one of the following criteria: personal certification from a recognized scheme such as the British Occupational Hygiene Society (P402), employment by an accredited company certified under ISO/IEC 17020 for asbestos surveys, or an equivalent national competence scheme (Qualibat in France, ENAC-accredited surveyor in Spain, NATA in Australia).
The company and the individual surveyor both matter. ISO/IEC 17020 accreditation covers the company's quality system — documented procedures, traceability, impartiality and technical supervision. Individual certification covers the surveyor's personal competence. A legitimate quote will tell you the accreditation reference number and the name and qualification of the surveyor who will physically do the work. If the company cannot produce an ISO 17020 certificate, or the surveyor cannot produce personal certification on request, the quote is not credible.
How a survey is carried out, step by step
A competent survey follows a repeatable process that a client can observe and audit:
- Pre-survey review — Historical plans, previous asbestos reports, refurbishment history and a brief interview with the owner or facility manager.
- Walkthrough and visual inspection — Room by room, noting every material that could plausibly contain asbestos, photographing it and sketching its location on a floor plan.
- Sampling — Taking small bulk samples of suspect materials using wetted cutting tools, bagged in double seal packaging with unique reference numbers. Each sample is logged on a chain-of-custody form.
- Laboratory analysis — Samples are sent to an accredited laboratory for identification by polarized light microscopy (PLM). Turnaround time is normally 1-5 working days.
- Risk and condition assessment — Each identified ACM is scored on accessibility, condition and risk using a formal scoring system (Material Assessment Algorithm in HSG264, for example).
- Report production — A written report including a photographed register, an annotated floor plan, all lab certificates, conclusions and management or removal recommendations.
What the report must contain
A compliant report is a legal document. At minimum, it should include:
- Unique report reference number, survey date, surveyor name and ID.
- Survey scope — type, areas covered, and exclusions with the reasons.
- A register of every identified ACM with location, material type, asbestos type, percentage, quantity and photograph.
- A floor plan showing each sample location, color-coded by confirmed asbestos content.
- Chain-of-custody records and original laboratory certificates from an accredited lab (UKAS, ENAC, ISO/IEC 17025 or national equivalent).
- A risk and condition assessment for each ACM, with a clear numerical score.
- Priority-ranked recommendations: manage in place, repair, encapsulate or remove.
- A signed declaration of independence and competence from the surveyor.
How pricing works
Asbestos surveys are quoted on three main factors: the type of survey, the floor area, and the number of bulk samples needed. A management survey of a small domestic property with 5-10 samples typically costs between €250 and €600 in Europe. A refurbishment survey of the same property can easily be €600-1,200 because it requires destructive access and more samples. A commercial building quote scales with floor area — most surveyors quote €1.50-4.00 per square meter for a management survey plus a fixed fee per sample analyzed (€20-60 each).
Very cheap quotes — below half the market rate — are almost always a red flag. They usually mean one of three things: the surveyor is not accredited, the survey is not actually accredited even if the company is, or the company plans to take far fewer samples than a compliant survey requires. A compliant survey of a complex building cannot be done in 20 minutes, and samples cannot be omitted to save cost.
Red flags and how to avoid them
The asbestos survey market is unfortunately full of low-cost operators who cut corners. Before you sign any quote, ask for the following in writing:
- A copy of the ISO/IEC 17020 accreditation certificate of the company, with the scope explicitly including asbestos surveys.
- The name, certification number and qualifications of the individual surveyor who will attend site.
- The name and accreditation number of the laboratory that will analyze the samples.
- A written sampling strategy — how many samples will be taken and why.
- A sample report from a previous job (redacted if necessary), so you can verify the format.
- Professional indemnity insurance with a coverage amount appropriate to the project.
If the surveyor is also offering to carry out any removal or remediation work identified by the survey, insist on a clear separation. A surveyor who stands to profit from finding more asbestos has a conflict of interest. In several jurisdictions, the same company cannot both survey and remove asbestos on the same project.
Questions to ask before hiring
Before you commit to a surveyor, run through this short checklist in your first conversation:
- What is your company's ISO 17020 accreditation number and where can I verify it?
- What is the certification of the surveyor who will attend? Can I see it?
- Which laboratory do you use, and is it ISO 17025 accredited for asbestos bulk analysis?
- What type of survey are you quoting me for, and why is that the right one for this project?
- How many samples will you take, and how is the sampling strategy decided?
- How long will the survey take on site, and when will I receive the report?
- Do you also carry out removal work? If yes, how is the conflict of interest managed?
- Do you carry professional indemnity insurance, and can I see the certificate?
After the survey: what to do with the report
Once you receive the report, read it. A surprising number of building owners file it in a drawer and do not act on the findings. The report is only useful if its recommendations are followed. Every identified ACM should be either removed, encapsulated or added to a written asbestos management plan. The plan should be updated whenever conditions change, whenever building work is carried out, and at minimum annually. Occupants, cleaners, contractors and maintenance staff should be informed of the ACMs that are relevant to their work before they start.
Keep the report, the lab certificates and the management plan together in a single file. This file is a legal document that may be required during a building sale, a refurbishment project, an insurance claim or a compensation case. Retaining it for the full lifetime of the building is normal practice.