Housebuilders face changes as energy performance assessments shift from SAP to the new Home Energy Model under the Future Homes Standard.
The UK housebuilding sector is preparing for a structural shift in how residential energy efficiency is measured. As part of the upcoming Future Homes Standard, the traditional Standard Assessment Procedure (SAP) is being replaced by the new Home Energy Model (HEM). This transition will fundamentally alter how Energy Performance Certificates (EPCs) are calculated for newly constructed properties.
The updated framework aims to align energy assessments more closely with real-world energy use, reflecting modern building techniques, low-carbon heating systems, and enhanced thermal efficiency standards. The changes will directly impact design choices, material selection, and compliance requirements for developers across the UK construction industry.
What does this mean for a UK tradesperson or DIYer actually buying this kit — does it change what they should pay, buy, or watch out for?
For small-scale housebuilders, developers, and sub-contractors, the shift to the Home Energy Model means material specification will become stricter. When sourcing building materials, insulation, heating equipment, and windows from merchants such as Wickes, B&Q, or independent builder's merchants, tradespeople must ensure all products meet the updated compliance data required by HEM software. Expect to see increased demand for higher-specification insulation products, heat pumps, and airtightness solutions. Builders should check that suppliers provide verified thermal performance data to avoid spec compliance failures when signing off new homes.
Reported by Housebuilder & Developer — original article
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