UKAS (United Kingdom Accreditation Service) is a Government approved body which is internationally recognised to accredit Certification Bodies. It accredits a Certification Body against an internationally recognised standard. Certass is accredited to operate product certification schemes against the standard BS EN17065.

Our UKAS accreditation matters! It places a duty upon us to certify our members impartially against agreed standards. It requires that our certification provides confidence to all interested parties including consumers, Governments and industry.

It is very different from the find a contractor schemes advertised on TV. These schemes are basically lead generation businesses that sell your information to contractors to be able to contact you to quote for work. Contractors can pay hundreds, if not thousands, of pounds per year to be a member of these schemes. As you will be able to determine there is a large potential conflict for these types of schemes.

Look for a UKAS accredited certification body to ensure they act impartiality to recognised standards. We are independently checked by UKAS on an on-going basis.

Certass currently operates three separate Government authorised certification schemes for Installers within the building refurbishment industry.

These certification schemes operate under Government license or Government sub-license. 

Within the building refurbishment market the two key areas that our licensed schemes fall into for the operation of a Competent Person Scheme are Glazing and Insulation, other trades are covered under our Green Deal and TrustMark licenses. 

Details of the scheme scopes for Installers can be found on our Home Page. Certass also runs a number of other certification schemes licensed directly by Certass.



Take a look at our short information video to see why you should choose a Certass Government authorised Competent Person scheme member.


Your feedback is important and we would appreciate it if you would complete this short survey.

Results of the survey are confidential and feedback is passed to the contractor without personal information. Both Certass and the contractors use the results of this survey to improve both their performance and customer service.

Was the overall service you received from the contractor:

In terms of the quality of materials used, were they:

What did you think of the workmanship?:

Did the overall project represent value for money?:

Would you recommend the contractor to a friend?:

Did the Building Regulation Compliance Certificate arrive in a timely manner?:

Is the Building Regulation Compliance Certificate clear?: