What is a SAP Assessment?

A SAP Assessment (Standard Assessment Procedure) measures the energy performance of new residential buildings. It is required to demonstrate compliance with Part L of the Building Regulations.

When is a SAP Assessment required?

SAP calculations are required for all new build homes and residential conversions, as well as certain highly glazed residential extensions.

Do you provide SAP Assessments in North Wales & Cheshire?

Yes. We provide both design-stage and as-built SAP calculations for projects across North Wales and Cheshire.

What is the difference between design-stage and as-built SAP?

Design-stage SAP calculations assess projected energy performance before construction. As-built SAP assessments confirm compliance once construction is complete.

Do SAP Assessments include an EPC?

Yes. Once complete, SAP calculations generate the Energy Performance Certificate required for Building Control sign-off and property sale or rental.

SAP Assessments in North Wales & Cheshire

Tŷ Architecture provides professional SAP Assessments for all new build dwellings, residential conversions and certain highly glazed residential extensions across North Wales and Cheshire. We ensure your project meets the energy efficiency requirements set out in Building Regulations and progresses smoothly through approval.

Robust SAP Assessments for Homeowners & Businesses

A SAP Assessment (Standard Assessment Procedure) is the UK Government’s approved method for measuring the energy performance of residential buildings.

It calculates:

Predicted energy use
Carbon emissions
Fabric performance (insulation, glazing, airtightness)
Heating and hot water systems
Renewable technologies

SAP calculations are required for all new builds and residential conversions, as well as certain highly glazed residential extensions, to demonstrate compliance with Part L of the Building Regulations and are used to produce an Energy Performance Certificate (EPC).

We carry out SAP modelling at design stage to ensure the proposed build meets required energy targets before construction begins. This helps avoid costly changes later.
Once the property is completed, we finalise the SAP calculations using confirmed construction details and produce the required compliance documentation.
If improvements are needed, we provide practical guidance on insulation upgrades, heating systems, glazing and renewable options to achieve compliance efficiently.

Comprehensive Architectural Design Services in North Wales & Cheshire

Tŷ Architecture provides architectural design services across North Wales, with over 17 years of experience delivering practical, well-considered designs for residential and commercial projects.

From early ideas through to planning and building regulations, we support clients at every stage of the process. While we have experience across a wide range of project types, we are always happy to discuss something new.