Standard Assessment Procedure (SAP)

When it comes to building or renovating a home, it is essential to understand and comply with the regulations set forth by the Domestic SAP Part L. These regulations are in place to ensure energy efficiency, sustainability, and the overall environmental impact of residential properties. 

Domestic SAP Part L regulations are a set of standards that focus on the energy performance of dwellings in the UK. These regulations aim to reduce carbon emissions, improve energy efficiency, and promote sustainability in residential buildings. By following these regulations, homeowners can create a more environmentally friendly living space while also saving on energy costs.

Domestic SAP Part L regulations play a crucial role in the fight against climate change. By ensuring that residential properties meet certain energy efficiency standards, these regulations help reduce the carbon footprint of buildings and lower the overall environmental impact. Additionally, complying with these regulations can lead to lower energy bills for homeowners, making it a win-win situation for both the environment and the wallet.



















There are two elements to SAP Calculations, and we would always advise that you obtain a design stage SAP at the beginning of any project and not cut corners, which could be a costly mistake.

The idea of the design stage SAP is to ensure that your plans will comply with current regulations and achieve the best rating possible. Very often, house builders leave the SAP until the end and find they need to either add renewables or remove certain aspects to enable the property to comply, which can be costly.

The second stage, and this part will be required by building control, will be to obtain an as-built SAP.

“Additionally, complying with these regulations can lead to lower energy bills for homeowners, making it a win-win situation for both the environment and the wallet.”