Part L 2022 Useful links Building Regulations (England): https://www.gov.uk/housing-local-and-community/building-regulation Approved Documents (England): https://www.gov.uk/government/collections/approved-documents Approved Documents (Wales): https://gov.wales/building-regulations-approved-documents Technical Handbooks (Scotland): https://www.gov.scot/policies/building-standards/monitoring-improving-building-regulations/ Future Homes Standard consultation: https://www.gov.uk/government/consultations/the-future-homes-standard-changes-to-part-l-and-part-f-of-the-building-regulations-for-new-dwellings Energy Efficiency in Buildings (Government policy and planning): https://www.gov.uk/housing-local-and-community/energy-efficiency-in-buildings Standard Assessment Procedure (SAP): https://www.gov.uk/guidance/standard-assessment-procedure Simplified Building Energy Model (SBEM): https://www.bre.co.uk/page.jsp?id=706 British Fenestration Ratings Council (BFRC): https://www.bfrc.org/ Certass Window Energy Ratings: https://www.certass.co.uk/energy-ratings-explained-for-your-windows/ BSI Kitemark for Window Energy Ratings: https://www.bsigroup.com/en-GB/our-services/product-certification/industry-sector-schemes/energy-kitemark-schemes/kitemark-for-window-energy-rating/ Part L + O OverviewPart L 2022 Current ThinkingPart L + O MediaNew DwellingsExisting DwellingsConservatoriesNew Non-DwellingsExisting Non-DwellingsOverheating in new dwellingsGovernment PolicyGlossaryPart L 2022 Useful links