How to Choose an Asbestos Contractor: What to Check Before You Hire

Why Contractor Selection Matters More Than Price

Asbestos removal is one of the few home improvement jobs where choosing the wrong contractor can have consequences that last decades. Asbestos fibres released during poorly controlled removal settle in the building, in the garden, and in the lungs of anyone present. They do not cause immediate symptoms. The diseases they cause — mesothelioma, asbestosis, lung cancer — develop 20 to 50 years after exposure. By the time you know something went wrong, it is too late to undo it.

The Control of Asbestos Regulations 2012 (CAR 2012) exists precisely because of this risk. It requires that certain types of asbestos work are carried out only by HSE-licensed contractors, using specific procedures, with independent verification that the work was done correctly. A contractor who is not licensed, or who does not follow the correct procedures, is not just cutting corners — they are committing a criminal offence and putting your health at risk.

Price matters, of course. But the difference between a proper job and a dangerous one is not usually visible in the final result. The asbestos is gone either way. The difference is in the procedures followed during removal, the air monitoring carried out, and the documentation provided at the end. Those are the things that protect you — and they are the things that a cheap contractor is most likely to skip.

Licensed vs Non-Licensed Work: What the Law Requires

Not all asbestos removal requires an HSE licence. The regulations divide asbestos work into three categories: licensed work, notifiable non-licensed work (NNLW), and non-licensed work. The type of work determines what qualifications and procedures are required.

Licensed work covers the most hazardous materials — asbestos insulation board (AIB), sprayed coatings, lagging, and any work where the exposure is likely to exceed the control limit of 0.1 fibres per cubic centimetre (f/cm³) or where the work is not short-duration. Only HSE-licensed contractors can carry out this work. The HSE must be notified at least 14 days before licensed work begins.

Non-licensed work covers lower-risk materials in good condition — asbestos cement sheets, floor tiles, Artex in good condition — where exposure is unlikely to exceed the control limit and the work is short-duration. Non-licensed work does not require an HSE licence, but it still requires proper procedures, PPE, and waste disposal. NNLW sits between the two — it does not require a licence, but it requires HSE notification and medical surveillance.

If you are not sure which category your job falls into, ask a surveyor before you contact any contractor. A surveyor will identify the materials, assess the risk, and tell you what type of contractor you need. Do not rely on a contractor to make this determination — they have a financial interest in the answer.

Six Red Flags That Should Stop You Hiring a Contractor

How to Verify a Contractor Before You Hire

Verification takes about 20 minutes. Do it before you agree to anything.

Seven Questions to Ask Every Contractor

Ask these questions before agreeing to any work. A reputable contractor will answer all of them clearly and without hesitation. Vague or evasive answers are a warning sign.

What a Proper Quote Should Include

A detailed, itemised quote is one of the strongest signals that a contractor knows what they are doing. Here is what should be in it: the survey or site assessment fee (if not already carried out); the removal cost, broken down by material type and area; enclosure and containment; PPE and decontamination; air monitoring during removal; waste packaging, transport, and disposal; independent 4-stage clearance; and any reinstatement work such as roof replacement after garage removal.

If a quote is a single line — "asbestos removal: £X" — ask for a breakdown. If the contractor cannot or will not provide one, that tells you something important about how they work.

Related Guides