Independent guidance · Comparison guides
UKAS 17020 vs UKAS 17025 Accreditation
Two different UKAS accreditations sit behind every credible asbestos report. A UK comparison of 17020 for inspection and 17025 for testing.
Key takeaways
- Management Survey of a school → UKAS 17020 inspection body + 17025 lab for the samples
- R&D Survey of an office fit-out → UKAS 17020 body + 17025 lab
- Standalone bulk sample of a suspect ceiling → UKAS 17025 lab (17020 optional if a surveyor takes the sample)
- 4-stage clearance after AIB removal → UKAS 17025 analyst body
- Reassurance air test after suspected disturbance → UKAS 17025 analyst body
Every credible UK asbestos deliverable — survey, sample analysis or air test — rests on one of two UKAS accreditations: ISO/IEC 17020 for inspection bodies (the survey side) and ISO/IEC 17025 for testing laboratories (the lab side). Confusing them is a common route to a legally weak report.
Interactive decision tree
Answer 2–3 questions to get a specific survey recommendation.
Question 1
What activity do you need accredited?
Head-to-head comparison
The two standards cover different activities and are audited separately. Serious asbestos consultancies hold both.
| Criterion | UKAS ISO/IEC 17020 | UKAS ISO/IEC 17025 |
|---|---|---|
| What it accredits | Inspection body — surveys and site inspection | Testing laboratory — bulk analysis and air monitoring |
| Activity | Asbestos surveys (Management, R&D, Reinspection) | PLM bulk sampling analysis, PCM air fibre counting |
| Reference method | HSG264 (surveys), HSG248 (analysts) | MDHS 77 (bulk), MDHS 39/4 (air) |
| Audit frequency | Annual UKAS surveillance visit | Annual UKAS surveillance + proficiency testing |
| Personnel qualifications | BOHS P402 (surveys) + P404 (analysts) | Analyst / lab tech with P401/P403 and lab experience |
| Certificate on report | UKAS 17020 schedule number | UKAS 17025 schedule number |
| What it does NOT cover | Laboratory analysis | Site surveys or inspections |
What this means
A survey needs 17020; a lab certificate needs 17025. A single accreditation is not enough on its own for a full survey deliverable.
UKAS 17020 — what it means
Applies to the inspection body carrying out the survey — the field surveyor, the report format, the sampling protocol and the risk-scoring methodology.
Pros
- Annual UKAS audit of survey procedure, competence and record-keeping
- P402-qualified surveyors as a documented baseline
- Schedule of accreditation is public and searchable on ukas.com
- Report format aligned to HSG264 sections — insurer-friendly
Cons
- Does not cover laboratory analysis — the samples still need a 17025 lab
- 17020 alone cannot deliver air testing or clearance
- Some surveys are marketed as 'UKAS' when only the lab is accredited — a common mislabel
UKAS 17025 — what it means
Applies to the testing lab — bulk PLM analysis under MDHS 77 and airborne fibre counting under MDHS 39/4.
Pros
- Annual UKAS audit of analytical procedure and proficiency testing
- Method-specific accreditation — MDHS 77 for bulk, MDHS 39/4 for air
- Results traceable and defensible in court, insurance and HSE audit
- Same accreditation covers clearance air testing under HSG248
Cons
- Does not cover the survey itself — a 17025 lab alone cannot deliver an HSG264 survey
- Cannot on its own answer 'is this area safe to occupy' without a competent analyst on site
- Proficiency testing is method-scoped — check the schedule for the specific method
Recommended scenarios
In every real-world case both accreditations end up in play. The examples below show which one drives the certificate.
- •Management Survey of a school → UKAS 17020 inspection body + 17025 lab for the samples
- •R&D Survey of an office fit-out → UKAS 17020 body + 17025 lab
- •Standalone bulk sample of a suspect ceiling → UKAS 17025 lab (17020 optional if a surveyor takes the sample)
- •4-stage clearance after AIB removal → UKAS 17025 analyst body
- •Reassurance air test after suspected disturbance → UKAS 17025 analyst body
What this means
Always check both certificate numbers on the report — 17020 for the survey, 17025 for the analysis.
Found this guide useful?
Need ukas 17020 vs ukas 17025 accreditation surveyed or removed?
Same-day written quotes from senior, UKAS-accredited consultants. coverage across England and Wales, from Leeds southwards — no obligation.
How to verify accreditation
The UKAS schedule of accreditation for any body is public. Ask for the schedule reference on any quote and search it at ukas.com — a two-minute check protects the entire spend.
What this means
The schedule reference is public. If a firm cannot produce it on request, treat that as the answer.
Recommended next step
In practice, the choice above turns on the facts of your building and the works. If you'd rather have an independent consultant confirm the recommendation in writing, request a fixed-price UKAS-accredited survey quote. Elements Surveying Group holds both UKAS 17020 (inspection) and works with UKAS 17025 laboratories — every deliverable carries both schedule references. Elements Surveying Group is UKAS 17025 accredited, does not own a removal arm and does not take referral fees — the recommendation is evidence-led, not commercial.
- •Request a fixed-price UKAS-accredited survey quote — one working day turnaround
- •Speak to a senior consultant on 0208 036 1099 (Mon–Fri, 8am–6pm)
- •Independent, UKAS-accredited, conflict-free — no removal arm, no referral fees
What this means
If the comparison still leaves doubt, request a quote — the enquiry costs nothing and puts the decision in writing from an independent, accredited consultancy.
Frequently asked questions
Do I need both accreditations?
For a full survey with samples — yes. The survey side is 17020 and the analysis side is 17025.
Is 'UKAS accredited' enough on a quote?
No — always ask which schedule number and which activities are covered. The word 'UKAS' alone is not a claim.
Can a P402 surveyor sample without 17020?
Legally yes, but the result carries far less evidential weight and most insurers now insist on 17020-covered surveys.
How do I check the schedule?
Search the firm name at ukas.com — the schedule of accreditation lists every method covered and the audit history.
Speak to an independent senior consultant about your project
The UK's Fastest-Growing Independent Asbestos Consultancy. Evidence-based recommendations, UKAS-accredited surveyors, coverage across England and Wales, from Leeds southwards. Every enquiry is reviewed by a senior consultant — consultancy before sales, no obligation.
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