SAP calculations for New Builds — Costs & Guide
SAP Calculations & EPCs For New Build Projects
Building Regulations Part L stipulates that all newly constructed dwellings must undergo SAP calculations (Standard Assessment Procedure calculations) to gauge their energy efficiency and ensure compliance with regulations.
SAP calculations analyse the annual energy expenses of a new dwelling, considering heating elements (including water heating), ventilation, and lighting fixtures. These computations determine the dwelling(s)' annual CO2 emissions.
Learn more about extension SAP calculations
Before commencing any construction work, new build SAP calculations must be submitted to the appointed Building Control Body (BCB). This submission aims to demonstrate that the proposed development will meet the necessary annual carbon emissions targets and minimum thermal performance standards. The SAP Assessment process encompasses DER/TER Calculation, along with DFEE/TFEE and DPER & TPER checks (relevant to England and Wales only).
Upon the completion of a development, an 'As Built' SAP Calculation is furnished for each finalized dwelling. This calculation is also utilized to generate an On Construction Energy Performance Certificate.
Discover more about our SAP calculations service, including the process and its inclusions, by visiting our website.
Frequently Asked Questions – SAP Calculations for New Builds
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What are SAP calculations for new builds?
SAP (Standard Assessment Procedure) calculations assess the energy efficiency of new dwellings, including heating, ventilation, lighting, and annual CO₂ emissions. -
When do I need to submit SAP calculations?
Design-stage SAP calculations must be submitted to the Building Control Body before construction begins to demonstrate compliance with Part L of the Building Regulations. -
What does an 'As Built' SAP calculation involve?
An 'As Built' SAP calculation is completed after construction to verify the final dwelling’s energy performance and produce an On Construction Energy Performance Certificate (EPC). -
Do SAP calculations include DER/TER and DFEE/TFEE checks?
Yes. The process involves DER (Dwelling Emission Rate) vs TER (Target Emission Rate), DFEE (Dwelling Fabric Energy Efficiency) vs TFEE, and DPER/TPER checks (England & Wales). -
Can SAP calculations for new builds help with extensions?
Yes, they are often linked with extension SAP calculations to ensure ongoing compliance with Part