Standards and accreditations, Support for businesses delivering retrofit

Supply Chain Advice Pack: Introduction to PAS 2035

Introduction

PAS 2035:2023 (Publicly Available Specification) ensures high quality, compliant installation of energy efficiency measures in existing homes, with the aim of advancing sustainability and overall performance of the nation’s homes.

Published: 7 December 2025

To ensure large scale retrofit meets the intended outcomes of the works, it is recommended that retrofit installation work should comply with PAS 2035; 2019(currently) or PAS 2035; 2023 (from March 2025).

Download the PDF below to access this Advice Pack. 

Readers that would like this document in a more accessible format should contact rise@turntown.co.uk.

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