The Hierarchy of Retrofit Compliance
Introduction
The UK seeks to transition to net zero carbon emissions by 2050. Running parallel to this target is the need to provide warmer and cheaper-to-run homes to combat the rising cost of energy and alleviate fuel poverty. This transition hinges on the successful retrofit of millions of existing homes. As retrofit activity scales up to meet national targets, so too must the mechanisms for ensuring quality, safety, and performance. PAS 2035 provides a framework for domestic retrofit and has accordingly been adopted as a compliance standard for any government grant funded residential retrofit project.
However, PAS 2035 does not operate in isolation. By interacting with the UK’s regulatory landscape, including the Building Regulation Approved Documents and various British Standards, a complex compliance ecosystem has been formed.
Published: August 2025
Contents
Welcome to the Quick Guide: The Hierarchy of Retrofit Compliance
This quick guide explores How PAS 2035:2023 operates alongside these other standards and regulations to deliver risk-managed, high-quality retrofit outcomes and whether a hierarchy of best practice emerges from the suite of documents and standards used for projects.
Download the document below to view the Quick Guide.
Readers that would like this document in a more accessible format should contact rise@turntown.co.uk.