SAP Calculations

Comprehensive SAP Calculation Services for Building Compliance

sap calculations

Embarking on a new build project, transforming a commercial space into a residential area, or adding an extension with significant glazing? Energy Performance Direct is here to ensure your project meets the essential thermal efficiency and energy requirements mandated by Part L of the Building Regulations through detailed SAP (Standard Assessment Procedure) Calculations.

Tailored SAP Calculation Solutions

We offer a complete suite of SAP Calculation services tailored to your project’s needs, including:

  • As-Designed SAP Calculation: For initial compliance assessment during the design phase.
  • As-Built SAP Calculation: To confirm compliance once the construction is complete.
  • Predictive EPC: An early estimation of your building’s energy performance.
  • New Build EPC: The final Energy Performance Certificate required for new constructions.

Optimizing Your Project from Design to Completion

Commissioning SAP Calculations during the early design stages of your project is ideal. However, Energy Performance Direct’s expertise allows us to step in at any phase, providing guidance to achieve compliance and optimize energy efficiency.

What We Need to Get Started:

To begin the SAP Calculation process, we’ll need the following from you:

  • A site layout and location plan, including the building’s orientation and nearby structures (PDF format preferred).
  • Detailed drawings, including Floor Plans, Sections, and External Elevations (CAD and PDF formats preferred).
  • A comprehensive Window and Door Schedule, along with specifications.
  • Specifications for your lighting and heating systems.
  • Notification of any post-design stage changes to the initial project plan.

Nationwide Service Without the Need for Site Visits

Our specialized process eliminates the need for on-site visits, enabling us to support self-build projects and passive house designs across the entire UK.

Customized Service for Every Project

Recognizing that every building project presents unique challenges and opportunities, we invite you to contact us for a personalized quote. At Energy Performance Direct, we’re committed to assisting you through the complexities of SAP Calculations, ensuring your project not only complies with Building Regulations but also achieves optimal energy efficiency.


SAP calculations are not expensive with costs ranging around the £100-£150 price mark for a large detached house.

SAP calculations are a must in order to produce a new or up-to-date EPC on your property or building and an EPC is required by law to rent or sell a property. To find out more on if you have an EPC you can visit the UK government website at:

SAP stands for Standard Assessment Procedure and is the government's way of calculating the energy performance of properties or dwellings. These are only needed for residential properties.

How are SAP ratings calculated? Although the heading of SAP is “The Government's Standard Assessment Procedure for Energy Rating of Dwellings or buildings”, the score is based on the energy costs. It's expressed on a scale of 1 to 100, the higher the number the lower the running costs.

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