
SAP Assessments
SAP calculations are used to demonstrate compliance with Part L1 of the Building Regulations. This requirement applies to any new dwelling, including home conversions and some extensions.
Cost-Effective SAP Assessments compliance with Part L1
All new buildings in England and Wales require a Standard Assessment Procedure (SAP) rating. This rating quantifies energy performance in terms of heating, lighting, and ventilation, and considers the fabric and structure of the building, the type and efficiency of thermal insulation, and any renewable technology installed.
SAP Calculations are necessary to test the emissions level of buildings that are newly built, extended, or converted. If you are a developer constructing multiple properties on the same plot, contact us to check our latest multiple SAP Calculation rates.
For private homeowners, if Building Control has requested a SAP Calculation for your extension (often due to the level of glazing), our team at CWE are here to guide you through the next steps to gain sign-off with your local authority.
At CWE, we provide cost-effective SAP assessments to ensure your building's energy performance is up to standard.
Our detailed evaluations help you understand and optimize your building’s energy efficiency, contributing to a sustainable and cost-effective project.
- Cost-Effective SAP Assessments
- New Builds & Conversions
- Conservatories & Extensions
- Over-Glazing Calculation
- Energy Statements
- Guaranteed Compliance
Contact us today to chat with one of our associates to discuss your project requirements and discover how our SAP assessments can help you achieve energy efficiency and regulatory compliance with confidence.
Our Retrofit Services include additional bolt services such as Thermal Imaging Damp and Mould investigations, and Borescope surveys.
These services can be part of planned survey works or carried out independently.
Ask about our other retrofit services:
Additional Retrofit Services

