Welcome to our premier service page dedicated to SAP Assessments (Standard Assessment Procedure) Calculations for domestic property extensions. Our expert team is committed to ensuring your extension projects meet all required energy efficiency standards and, furthermore, comply with UK Building Regulations.

Building Regulations specify that the glazed area in your extension should not exceed 25% of the total floor area. However, many modern extension designs feature significantly more glazing. If you plan to include more glazing than the 25% limit allows, we can provide a specialized SAP calculation to help you achieve this while ensuring compliance with energy efficiency standards.
Before initiating your extension project, we offer:
Our detailed assessments include:
Ensure your property extension is energy-efficient, compliant, and sustainable. Contact us today to schedule a consultation and discover more about our SAP Calculation services for extensions.
Optimise the energy performance of your property extension with our expert SAP calculations. Let’s work together to create comfortable, cost-effective, and sustainable living spaces.
Have a question or need assistance? We’re here for you. Just send us a message, and we’ll get back to you promptly.
To discuss your project or specific requirements further or for a FREE quotation please contact us.