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Residential Knowledge
Welcome to our residential knowledge base focused on UK housing compliance and delivering homes that meet Building Regulations first time. Here, you’ll find clear, practical guidance on Part L (SAP calculations and fabric performance), Part O overheating, Part F ventilation testing, and Part G water efficiency.
Whether you're working on a single dwelling, a housing development, or a complex conversion, our content is built around real project delivery. We explain how to achieve compliance efficiently from early design and planning through to airtightness testing and final sign-off—without unnecessary redesigns or hidden costs.
Stay up to date with the latest residential requirements, including Part L 2021, photographic evidence (BREL/BRUKL), and the forthcoming Future Homes Standard, with insights tailored specifically for architects, developers, and housebuilders.
Air Tightness Testing for Residential Buildings
A Complete Guide for UK Developers - Discover everything you need to know about air tightness testing for residential buildings in the UK. From Building Regulations compliance to testing procedures, costs, and common failures - expert guidance from Energy Report Limited.
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What Are SAP Calculations? A Clear Guide for Architects, Developers and Self Builders
If you’re planning a new build, extension, or residential conversion, understanding SAP calculations early can save time, cost, and compliance risk later in the project.
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Over-Glazed Extensions and Part L Compliance
Large areas of glazing are one of the most desirable features in modern extensions. Many people are not aware there are requirements under Building Regulation Part L that set out the maximum allowable glazed area. Planning an extension with more than the 25% allowance, read on.
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Octopus Energy Zero Bills Certified Assessors Partner
The new standard for home, everywhere
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The Importance of Thermal Bridging (Psi-Values)
Thermal bridging sometimes called cold bridging occurs when heat escapes through weak points in a building’s insulation
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Part O – Overheating: What UK Developers Need to Know
Overheating in homes is no longer a future concern. With rising summer temperatures and increasingly airtight, well-insulated dwellings, the risk of overheating has become a major health and comfort issue.
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Energy Statements for Planning
Energy Statements are now a key document in many new build and conversion planning applications for both residential and commercial developments.
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