It is a requirement of Approved Document L1, that before starting work on site your Building Control Officer must be provided with a SAP calculation for each new-dwelling.

SAP stands for ‘Standard Assessment Procedure’ and is the Government’s method for calculating the energy performance of dwellings. SAP calculations form part of the government’s plan to limit carbon emissions and tackle fuel poverty. 

The purpose of the pre-construction SAP calculation is to confirm to Building Control that the proposed design will meet the requirements of Approved Document L1, before work advances on-site and it becomes impractical to make any necessary changes.

Once construction works are complete the Building Control Officer will require an updated copy of the SAP calculation, taking account of all as-constructed data.

Our SAP assessors can provide you with support throughout the process, ensuring that you have everything required to achieve Building Control sign-off.

Before any building work can begin, design-stage SAP calculations that show a pass for all criteria must be provided to Building Control.

Design-stage SAP calculations are used by Building Control to verify that the proposed drawings and specification for the development satisfy the compliance criteria of Approved Document L1.

If you do not achieve a pass, we can provide solutions to ensure that your designs meet compliance. These could include changes to the thermal insulation of the building fabric, improvements to the air leakage characteristics of the dwellings (and performance of ventilation equipment) or changes to the heating and hot water systems.

Once changes have been agreed we shall issue design-stage SAP reports that can be provided to Building Control.