SAP Calculations for Extensions and Conversions: What You Need to Know

If you’re working on a change of use project, a large extension, or a conversion to residential, you may be legally required to submit SAP Calculations. These scenarios fall under building regulation compliance, particularly where there’s a change in thermal performance or dwelling size.

Typical Scenarios That Require SAPs

• Barn or office-to-flat conversions
• Loft conversions that form a new dwelling
• New rear extensions adding bedrooms or kitchens

How EnviroSolution Supports These Projects
We’ve helped clients from sole traders to national builders navigate the often confusing landscape of extension rules. Our team ensures your SAP Calculations include accurate measurements, glazing ratios, and updated thermal bridging to meet Part L standards.

Speed and Accuracy
You’ll get a full breakdown of compliance results, recommendations for any changes, and support with your EPC application. Whether it’s one dwelling or 50, EnviroSolution delivers reliable SAP Calculations you can trust.