SAP EPC & SAP Calculations | New Build Energy Compliance

SAP EPC

What Is a SAP EPC?

A SAP EPC measures the energy efficiency of a new dwelling using government-approved SAP methodology. Unlike RdSAP (used for existing homes), SAP is more detailed and considers the building’s full design specifications, including insulation levels, heating systems, ventilation, air tightness and renewable technologies.

A SAP EPC provides:

Predicted energy performance
Carbon emissions rating
Detailed energy modelling
Compliance with Part L regulations
Recommendations for improvement

Every new home must achieve a compliant SAP rating before it can be signed off by Building Control.

Matter

Why SAP EPCs Matter for Construction Projects

SAP assessments play a critical role in the design and construction of modern homes. They ensure that new dwellings meet minimum energy efficiency requirements and help reduce carbon emissions.

A SAP EPC also impacts:

Building Control approval
Construction cost planning
Renewable technology selection
Insulation and fabric specification
Final EPC issue before sale

Without a compliant SAP EPC, a property cannot legally be completed or sold.

Why Choose

Why Choose Home Energy EPC for Your SAP EPC?

We understand the importance of accuracy, speed and communication in construction projects. Our assessors work closely with developers and architects to deliver professional SAP calculations that keep your project moving without delays.

What Sets Our SAP Service Apart:

Fully accredited and insured SAP assessors
Fast turnaround times
Clear guidance on achieving compliance
Support from design stage to final testing
Competitive pricing with multi-plot discounts
Straightforward communication throughout

We help you save time, reduce costs and avoid redesigns by ensuring compliance early in the process.

What’s Included

What’s Included in a SAP Assessment?

SAP assessments are detailed, model-based evaluations of your planned construction. Our service includes every stage required to obtain a final SAP EPC.

Design Stage SAP Calculations

Before construction begins, we assess your building plans to model predicted energy performance. We review insulation values, materials, heating systems, window specifications and air tightness targets.

If your design does not meet Part L, we provide practical recommendations such as:

Improved U-values for walls, floors or roofs
Different glazing options
Upgraded heating or ventilation systems
Renewable energy considerations

Fabric Energy Efficiency Calculations (FEE)

We ensure your design meets the required efficiency targets for fabric performance.

Dwelling Emission Rate (DER) vs. Target (TER)

We model carbon emissions to confirm your design meets national standards.

Renewable Energy and Low-Carbon Technology Advice

Heat pumps, solar PV, MVHR systems and other options may help you comply more cost-effectively.

As-Built SAP Calculations

Once the build is complete, we update your SAP calculations with:

Air tightness test results
Any modifications made during construction
Exact heating and ventilation installations

This generates the final SAP EPC.

Final EPC Issue

Your SAP EPC is submitted to Building Control and is required for legal completion.

Who Needs

Who Needs a SAP EPC?

A SAP EPC is required for:

New build residential dwellings
Conversions into flats or homes
Change-of-use projects (e.g., offices to apartments)
Extensions with more than 25% glazing
New dwelling units created by renovations

If your project involves creating a new habitable dwelling, you need SAP calculations.

Take

How Long Does a SAP EPC Take?

Design-stage calculations are typically completed within 1–3 working days, depending on project complexity. Final as-built SAP EPCs are completed once air test results and final specifications are provided.

We work closely with your builder, architect and Building Control officer to deliver seamless communication.

Common Issues

Common Issues We Help Prevent

Many builds encounter compliance issues late in the project. We help you avoid:

Failed Part L compliance
Air tightness test failures
Incorrect U-values
Overheating risk
Costly re-specification late in the build

By getting SAP calculations done early, you minimise surprises and avoid delays.

Offer

Pricing

Our SAP EPC pricing is competitive, transparent and based on project size and complexity. We offer:

Single-plot pricing
Multi-plot discounts for developers
Complete packages including air tests and EPC

let’s make it shine!

Book Your SAP EPC Today

If you’re planning or completing a new build, conversion or change-of-use project, Home Energy EPC provides fast, accurate and fully compliant SAP EPCs to keep your build on track.

info@homeenergyeepc.co.uk

0121 000 0000

Book your SAP EPC assessment today and ensure your project meets all energy and Building Regulation requirements.