How to check an asbestos surveyor: UKAS accreditation, qualifications, independence and 'visual sample' red flags

There is no legal requirement for an asbestos surveyor to be accredited, but HSE strongly recommends using a survey organisation accredited by UKAS to ISO/IEC 17020, with samples analysed by a lab accredited to ISO/IEC 17025. If a firm isn't accredited, ask for the surveyor's qualifications, written procedures and references for similar recent work, and check that samples are physically taken rather than "visual".

Key takeaways

• Accreditation isn't legally required, but HSE "strongly recommends" UKAS accreditation to ISO/IEC 17020 for surveyors. UKAS is the only accreditation HSE recognises in GB.
• Check the firm on the UKAS website (listed as an "Inspection Body") and the lab (ISO/IEC 17025).
• Not accredited? Ask for qualifications (e.g. BOHS P402), written procedures and references.
• Prefer a surveyor who doesn't also sell removal work. HSE asks you to check "independence and impartiality".
• Challenge any "visual sample" on a report: only a lab-analysed sample confirms asbestos.

Does an asbestos surveyor have to be UKAS accredited?

No. HSE says plainly: "there is no legal requirement for asbestos surveyors to be accredited" [1]. But it goes on to say that it "strongly recommends" using surveyors accredited to BS EN ISO/IEC 17020, and that "in GB the only accreditation recognised by the HSE is that provided by the United Kingdom Accreditation Service (UKAS)" [1].

This is the question a freeholder asked on MoneySavingExpert, after a buyer's solicitor requested a survey of the communal areas: "What accreditation should they have?" and "I am not clear if the accredition is a requirement to make the survey 'valid'" [2]. The thread got no replies. The short answer: a survey by a competent but unaccredited surveyor is not automatically "invalid", but accreditation is the easiest independent evidence of competence. If someone (a solicitor, a lender, a managing agent) has asked you for a survey, ask them whether they require a UKAS-accredited provider before you book.

Jargon in one line each:

• UKAS: the UK's national accreditation body. It assesses organisations against international standards.
• ISO/IEC 17020: the standard for inspection bodies; this is what applies to asbestos survey firms [1].
• ISO/IEC 17025: the standard for testing laboratories; this applies to the lab that analyses your samples [1]. HSE says a lab analysing samples should hold this accreditation [1].

How do I check a surveyor's UKAS accreditation?

1. Ask for the UKAS number of the survey organisation, and the name and number of the lab they use.
2. Search the UKAS website. HSE notes that "UKAS accredited survey providers are listed as Inspection Bodies on its website" [1]. You can search for the lab on the same site.
3. Check the scope. Accreditation covers specific activities. Make sure asbestos surveying (or asbestos fibre analysis, for the lab) is in the schedule, not just an unrelated service.
4. Check the name matches. The firm quoting you should be the accredited one, or should say clearly that it subcontracts to an accredited body.

What qualifications should an asbestos surveyor have?

HSE doesn't name a single mandatory certificate on its sourcing page. Instead, where a surveyor isn't accredited, it says "reasonable enquiries should be made to ensure that the surveyor used is competent", and gives examples of evidence: "details of qualification, copies of written procedures, references to evidence of other similar work recently undertaken" [1].

In practice, the qualification you'll most often see for individual surveyors is the BOHS P402, "Surveying and Sampling Strategies for Asbestos in Buildings", from the British Occupational Hygiene Society [3]. It's reasonable to ask for a copy of the certificate of the person who'll actually visit, not just the company director's.

HSE also lists four things a provider should be able to show: that they "can provide evidence of suitable competence and training", "can demonstrate independence and impartiality", "have effective management and quality systems in place" and "carry out the work in accordance with recognised guidance" [1]. The recognised guidance for surveys is HSE's HSG264.

One more thing to ask about is professional indemnity insurance. On a business forum a surveyor said their insurance cost "1300-1800 for surveying only" and warned that "one bad miss can sink a company" [4]. Asking for proof of current cover is normal.

Why does independence matter?

A firm that both surveys and removes has an obvious incentive to find more asbestos, or to recommend removal over leaving materials in place. Forum advice is consistent: "Get an independent survey done, not one by a firm that also does removals" [5]. HSE asks you to confirm that providers "can demonstrate independence and impartiality" [1].

That doesn't make every such firm dishonest, but you should:

• ask directly whether the firm, or a related company, will quote for removal;
• be wary of a report that recommends removal of materials described as in good condition. HSE's advice for homes is that sound materials are often best left where they are [6];
• get removal quotes separately, from firms that didn't do the survey.

What are the 'visual sample' red flags?

A "visual sample" (or "presumed") entry means the surveyor recorded a material as asbestos, or not asbestos, without taking a sample to a lab. There can be good reasons: sampling the same Artex in every room is wasteful once one sample is positive. But it can also hide a survey where almost nothing was tested.

HSE is clear that "the only way to confirm if a suspect material contains asbestos fibres is to obtain and analyse a sample of it" [7]. A forum thread from 2018 shows what goes wrong: a surveyor claimed he could confirm asbestos by sight because of "25 years experience", and the poster later described paying "350 quid for an assessment that isn't worth the paper it's written on because no samples had been taken" [8]. Replies on that thread are a useful rule of thumb: "Experience can tell you if it's suspicious. Only a sample can confirm if it actually is asbestos", and "Challenge anything which has been entered as a visual sample and not physically sampled" [8].

Red flags in a quote or report

• No physical samples at all, or far fewer samples than suspect materials.
• Visual entries for materials that are cheap and easy to sample.
• No lab named, or a lab without ISO/IEC 17025 accreditation.
• Large "no access" areas (loft, garage, under floors) with no explanation. HSE says areas not accessed must be presumed to contain asbestos [7].
• A one-line quote ("asbestos survey £X") with no areas or sample numbers.
• Pressure to book removal with the same firm.

Questions to ask before you book

Copy these into your email, or use our free brief tool to send the same scope to every firm:

• [ ] What is your UKAS accreditation number (ISO/IEC 17020)? If none, can you send the surveyor's qualifications, your written procedures and two references for similar recent work? [1]
• [ ] Which lab analyses the samples, and is it UKAS-accredited to ISO/IEC 17025?
• [ ] Who will carry out the survey, and what qualification do they hold?
• [ ] Which survey type are you quoting for: management or refurbishment & demolition? (Unsure? Read management vs R&D.)
• [ ] How many samples are included, and what's the price per extra sample?
• [ ] Are the loft, garage and outbuildings included?
• [ ] When will I get the report, and will it include photos, a register and any no-access areas?
• [ ] Do you, or any linked company, carry out asbestos removal?
• [ ] Do you hold professional indemnity insurance?

HSE also advises that "clients should fully instruct and work on the specification with the surveying organisation" [1], so the clearer your brief, the more comparable your quotes.

FAQ

Is an asbestos survey valid if the surveyor isn't accredited? There's no legal requirement for accreditation [1], so a competent unaccredited survey isn't automatically invalid. But if a solicitor, lender or agent asked for the survey, check whether they require UKAS accreditation before you book.

What does UKAS accredited mean for an asbestos surveyor? It means UKAS has assessed the organisation against ISO/IEC 17020 for inspection. HSE says UKAS is the only accreditation it recognises in GB [1].

How do I check if a lab is UKAS accredited? Ask for the lab's name and accreditation number, then look it up on the UKAS website. The lab should be accredited to ISO/IEC 17025 for asbestos analysis.

Is BOHS P402 enough? P402 is a widely used individual qualification for surveying and sampling [3], but it's evidence about one person, not the firm's procedures or lab. Combine it with references and a named accredited lab.

What is a 'visual sample' on an asbestos report? An entry where a material was assessed by eye, not tested. It may be reasonable for repeated identical materials, but challenge visual entries where a sample could easily have been taken [8].

Should the same company survey and remove the asbestos? Many people prefer to keep them separate to avoid a conflict of interest [5], and HSE asks you to check independence and impartiality [1].

Can I trust a cheap 'one man' company? Price alone doesn't tell you. Check accreditation or qualifications, the lab, the number of samples and the areas covered. See asbestos survey cost UK for 2026 ranges.

Next step

Once you know what to look for, compare like-for-like. Use the survey-type selector, the budget planner and a written brief, then request quotes. Our provider listings are unclaimed and fees and accreditation are not independently verified, so run the checks above on any firm before booking. Buying? See what to do when the RICS survey says asbestos may be present.

Please note: this article is general information, not legal advice. Requirements can differ where a third party (solicitor, lender, managing agent or insurer) specifies a survey standard. Check current HSE guidance and the UKAS register yourself.

Sources

1. Sourcing professional advice and services on asbestos issues – HSE
2. Asbestos survey: what accreditation should they have? – MoneySavingExpert forum (2016)
3. P402 Surveying and Sampling Strategies for Asbestos in Buildings – BOHS
4. Asbestos surveys in the property buying process – UK Business Forums (2017)
5. Asbestos survey – MoneySavingExpert forum (2016)
6. Asbestos FAQs – HSE
7. The duty to manage asbestos in buildings: Arrange an asbestos survey – HSE
8. Asbestos survey advice please – Singletrack World (2018)

Independent general information. Requirements and prices depend on scope, locality, technical standards and current regulations. Verify critical details with qualified professionals and relevant authorities.