The Contractors Health and Safety Assessment Scheme

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This certainly seemed to prove an easier and more painless way to attain our accreditation.

Kings Security (Full Application)


The new process was clear, very quick and easy to use.I would not hesitate to use this service when our accreditation comes up for renewal next year.

Cityspec Specialist Pest Management Solutions Ltd (Deem To Satisfy)

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A high percentage of new business is generated through successful tenders. Over the years the number of lead contractors that make CHAS registration a prerequisite in the tendering stage has risen substantially. One of our biggest customers accepts CHAS as an alternative to having to go through their own health and safety questionnaires. This allows us to streamline our tendering process to maximise the number of projects we can work on.

Greens Decorating Contractors Ltd.

With my company being small, the assessment works well for me, but also keeps me up to date with all my H&S. Without using CHAS some of these things could get forgotten about, so would cost my company in contracts in the future.

T Brown Joiners.

Joining CHAS really made us consider out H&S procedures in more detail and having to document them all instantly makes them easier to maintain and renew.

Ecological Land Management Ltd.

CHAS is a great service which has helped my company become better and which has resulted in us winning more contracts of work. I have also recommended CHAS to other companies I work alongside who have now also become CHAS accredited.

MA Brickworks Ltd.

The accreditation process itself is a great way of monitoring the H&S within your own company, so by itself forces training in areas you may not be familiar with, so money well spent.

Probe Lockers.

I would just like to thank you for your help and expertise throughout this whole process. My experience with CHAS was great from start to finish.

Autism Hampshire.

We first achieved our CHAS accreditation in 1998 and have found it very useful as a means of demonstrating that we comply with current health & safety law in the construction industry. CHAS is recognised across the whole of our industry so it reduces the amount of time and resources needed to pre-qualify for projects.

Concrete Repairs.

Frequently Asked Questions for Client Users (Buyers and Prospective Buyers)


Prospective Buyers


Q: What are the benefits of being a CHAS buyer?

A: In essence, we complete the initial Health and Safety application process for you. Please see the buyer checklist for prequalification schemes or read more about CHAS.

Q: Who can become a CHAS buyer?

A: The scheme is open to the public and private sectors. CHAS membership extends to health trusts, councils, emergency services, the voluntary sector, housing associations, government departments and private companies who have a supply, for example Royal Mail Group and British Aerospace to name but a few. View buyers.

Q: Is CHAS just for the construction industry?

A: No. The database stores information on a wide range of contractors and consultants (suppliers). It addresses all categories of work from asbestos removal to window cleaning and from catering to residential care. We currently have 124 work categories to select from in the database.

Q: How much does it cost to be a CHAS buyer?

A: There is no charge for being a CHAS buyer.

Q: Who manages the CHAS system / scheme?

A: CHAS is owned and managed by the London Borough of Merton. Click here for more details.

Q: Does a CHAS assessment determine the competence of a supplier?

A: Yes but only to the first stage described in the CDM 2007 Approved Code of Practice . A compliant supplier has demonstrated they have adequate compliance with current legislation and sound management of health and safety. The ACoP requires the buyer to undertake a second stage (job or project specific) assessment. CHAS cannot do this for you.


Current buyers


Q: As a CHAS buyer must I do Health and Safety assessments?

A: No. We recognise that some prospective buyers do not have the skills or resources necessary to undertake supplier assessments so we offer subscriber level membership (can search the database only).

Q: Do suppliers need a written Health and Safety policy?

A: Yes, if they have 5 or more employees. No, if they have fewer than 5 employees; the CHAS application form for those employing fewer than five people is specifically designed to help the supplier prove their commitment and management to health and safety.

Q: Can second stage assessment findings be displayed in CHAS?

A: Yes but only in the form of a 'comment' or 'private comment'. A supplier who has been listed as compliant on the database, has achieved the required threshold standard. As the standards for a second stage are not clearly defined, someone using the information will be unaware of what has been checked, and there can be no guarantee of consistency.

Q: Can CHAS be used in the short-listing process for term contracts?

A: Yes it can but you should remember that your selection process must be fair, clear and auditable when drawing up the short-list. All suppliers must be treated in the same way. Your application used in the process would need to reflect CHAS standards, and also build on them to elicit information relating to the second stage.

If a supplier has been recently successfully assessed as CHAS (stage 1) compliant (say in the last 9 months) you need only assess the second stage competence element.

If the supplier has failed a CHAS assessment or has not been CHAS assessed, you need to complete a stage 1 assessment. If they fail, there is no point in doing a stage 2 (they have not demonstrated compliance and/or adequate management). They are not short-listed for this reason and you have saved time and work.