At RJ Energy, we provide a coordinated approach to Building Regulations compliance, sustainability targets and energy performance certification. We work on a range of projects from self build properties and domestic extensions, through to large scale residential new build and commercial buildings.

SAP Calculations

SAP Calculations (Standard Assessment Procedure) are used to work out the energy performance of a dwelling and are required for all new builds, as well as conversions and many extensions.

Learn More
Water Efficiency Calculations

Water Efficiency Calculations are used to measure compliance with water efficiency targets for new build dwellings and conversions. These calculations are used to ensure compliance with Part G of UK Building Regulations where a maximum water use of 125 litres per person is required.

Learn More