PAS 2035:2019

This new specification came in to effect on 30th June 2019.  It is the new overarching document in the retrofit standards framework; which specifies the requirement for a holistic approach to the retrofitting of dwellings. The document also gives better clarification regarding the qualifications and responsibilities of individual retrofit roles and respective activities required prior to the commencement of the physical installation.

It is not possible to be certificated to PAS 2035:2019 as TrustMark is positioned to deliver the compliance function. TrustMark Registered Businesses carrying out work within its scope are required to be compliant with its requirements; subject to the transition arrangements outlined below.

PAS 2030:2019, also came in to effect on 30th June 2019 and is the new industry specification to replace PAS 2030:2017. It is inextricably linked to PAS 2035 with its increased focus on the requirements of the installer. 

The established certification requirement and process will continue as with PAS 2030:2017. TrustMark Scheme Providers will ensure Registered Businesses delivering services within the scope of these specifications, are compliant and that they work within the scope of their certification; again, subject to the transitional arrangements.



PAS Transitional Arrangements

It is recognised that transitional arrangements will be required to support the industry adopting the new standards.

The transitional arrangements are as agreed with; The British Standards Institution (BSI), The Department for Business Energy and Industrial Strategy (BEIS) and the United Kingdom Accreditation Service (UKAS). The transitional arrangements are as follows:


A '24-month' transition period for PAS 2035:2019 and PAS 2030:2019 specifications - 30 June 2019 to 30 June 2021. This transition period has been agreed to allow time for UKAS to accredit certification bodies and subsequently for certification bodies to certify Registered Businesses.

During the transition period, once a TrustMark Scheme Provider or an alternative certification body (as appropriate) is accredited to PAS 2031:2019 by UKAS, it shall no longer issue new certifications to PAS 2030:2017.

During the transition period, Registered Businesses must be certified as compliant with either PAS 2030:2017 or PAS 2030:2019 by a PAS 2031 accredited Scheme Provider/certification body, subject to the restrictions on new certifications set out above, and must comply, and be able to evidence compliance, with the PAS against which it is certified. Once a Registered Business is certified as compliant with PAS 2030:2019, and be able to evidence compliance,with PAS 2035:2019 as well - this includes using a PAS 2035:2019 design specification.
The transitional arrangements will expire on 30th June 2021 after which all Registered Businesses delivering energy efficiency measures within the scope of PAS 2035:2019 and PAS 2030:2019 must be certified as compliant with PAS 2030:2019 by a PAS 2031:2019 accredited Scheme Provider/certification body and comply, and be able to evidence compliance, with both PAS 2035:2019 and PAS 2030:2019. This will ensure that all Registered Businesses are certified to PAS 2030:2019 by the end of the transitional period.


This page is under regular review and will be updated frequently. Last updated 01 November 2019