SAP Calculations (Soon to be Home Energy Model)
Your trusted partner for Standard Assessment Procedure (SAP) Calculations across the United Kingdom
Registered SAP assessors with ELMHURST ENERGY

Whether you're constructing a new building, expanding with an extension, or converting existing structures, our certified SAP assessments, soon to transition into the new Home Energy Model ensure your project meets all regulatory energy efficiency requirements.
At UKBC, we understand that SAP Calculations (Standard Assessment Procedure), currently the mandated method for Part L compliance, are more than just a regulatory checkbox; they are a vital component of your project's success in energy conservation. With the government preparing to introduce the Home Energy Model as SAP’s successor, we remain at the forefront of these changes. Our team of expert assessors, registered with Elmhurst Energy, is committed to providing detailed, future-ready evaluations using the latest standards and technologies. We aim to help you optimise your building's energy performance, ensuring sustainability and cost-effectiveness from the outset.
Why choose UKBC for your SAP Calculations?
(Soon to be Home Energy Model)
1. Expertise and Reliability
Our assessors bring years of experience and a deep understanding of building regulations across different regions including England, Wales, Scotland, and Northern Ireland.
2. Customised
Service
We offer a range of SAP Calculations tailored to meet the specific needs of your project, from new builds and extensions to conversions.
3. Comprehensive Support
With UKBC, you receive full support throughout your project. From initial assessment to final certification, we guide you every step of the way, ensuring that your building not only meets but exceeds energy compliance standards.
Embark on your next construction project with confidence.
Choose UKBC for professional SAP Calculations and experience a seamless, efficient process that delivers results.
Detailed Service Descriptions for SAP Calculations
(Soon to be Home Energy Model)
SAP Calculations for new builds are essential for ensuring that new constructions comply with Part L of the Building Regulations in England and Wales, and similar standards across the UK. These calculations assess the energy performance of new dwellings from the design stage through to completion, focusing on factors such as insulation, heating systems, and lighting efficiency. Our service includes detailed advice on how to meet or exceed these regulatory requirements, potentially saving costs and enhancing energy efficiency from the outset.
When extending your home or building, it's crucial to ensure that the new addition doesn't negatively impact the energy performance of the existing structure. Our SAP Calculations for extensions evaluate both the existing parts and the new extensions to ensure overall energy compliance. This service is tailored to identify the most effective enhancements to insulation and heating systems that can integrate seamlessly with your current setup.
Converting a building into a habitable space often requires a careful assessment to meet the energy standards stipulated by local building regulations. Our SAP calculations for conversions analyze the thermal efficiency and carbon output of the converted space to ensure it meets the necessary criteria. We provide insights and recommendations on how to improve areas like roof, wall, and floor insulation, and update heating and lighting systems for better energy performance.
Additional Information and Key Differences
Standard Assessment Procedure (SAP):
SAP is the current methodology used by the UK government to assess and compare the energy and environmental performance of buildings. It plays a crucial role in ensuring that all new buildings, extensions, and conversions meet legal energy efficiency requirements.
However, this system is set to evolve with the Home Energy Model (HEM) scheduled to replace SAP as part of the upcoming Future Homes Standard. While SAP remains the official standard today, HEM will soon offer a more accurate and future-facing approach to energy assessment.
Differences between Services:
While all project types involve assessing energy efficiency, their specific focus and compliance requirements vary:
- New Builds: Designed from the ground up to meet (or exceed) baseline energy performance standards using SAP and eventually, the Home Energy Model.
- Extensions: Ensure that new additions integrate seamlessly without compromising the energy efficiency of the existing structure.
- Conversions: Transform non-residential properties into energy-compliant dwellings, requiring detailed calculations to meet residential standards under SAP (and soon HEM).
What our customers say...
Excellent Professional Service!
Excellent professional service, from my initial telephone call with Mo, through to prompt and efficient processing of the job, from Bethany and Melissa.
The high standard of service provided by your company, exceeded my expectations and helped me to obtain my SAP and EPC certificates, with minimal fuss and effort.
If 'Carlsberg' did service expectations!
Just had 'as designed' SAP calcs and Part O overheating compliance undertaken on four properties for planning submission in less than a couple of days including clearing up an additional query which I had omitted.
Tom and Beth really pulled out all the stops for me as I was on a deadline. As a property developer, it is unusual service these days that somebody actually exceeds your expectations, on a low bar never mind a high one. Good prices and very professional, know their stuff. Do not even bother going elsewhere. I'll be back. Thank you all once again and Happy Christmas.
Very Helpful and Efficient Would Definitely Recommend
Very helpful and efficient when I called to enquire about Water calculations & SAP report for our renovation to be signed off. Nothing was too much trouble and these were completed swiftly, would definitely recommend
FAQs
SAP Calculations (Standard Assessment Procedure) are required by Building Regulations to assess the energy efficiency of new builds, conversions, and certain extensions. They are essential for demonstrating Part L compliance.
Prices vary based on project type and complexity. At UKBC, SAP Calculations typically start at £99 + VAT. Contact us for a tailored quote based on your specific plans.
Most SAP Calculations can be completed within 1–3 working days, depending on the quality of the plans and how quickly any issues are addressed.
Yes, if your extension has significant glazing or increases the overall energy demand, SAP Calculations may be required to show Part L compliance. We can advise based on your drawings.
You'll need architectural plans, construction specifications (walls, roof, floor), heating and hot water system details, and information on any renewable technologies. The more complete your documentation, the faster we can assess.
Absolutely - our quotes include unlimited advice and specification revisions as standard. We are here from start to finish to support you.
No! Our SAP quotes are inclusive of Design Stage, As Built Stage & the final EPC.
One of our SAP team will review the drawings provided & request any further information required within 24 business hours of acceptance.
This is dependent on project size, but we generally advise up to 10 working days. If you have a specific deadline, please mention this & we will endeavour to meet it.
The Home Energy Model (HEM) is the UK government’s upcoming replacement for SAP (Standard Assessment Procedure). It is a new methodology designed to provide more accurate, real-world insights into the energy performance of homes. HEM will place greater emphasis on factors like local climate data, smart technology integration, and actual energy use patterns.
The Home Energy Model is expected to come into use alongside the Future Homes Standard, originally planned for 2025 but now likely to be delayed until 2026. Until then, SAP remains the required methodology for regulatory compliance, including Part L assessments.
If your project is already underway or completed using SAP, you won’t need to re-submit under HEM. However, for future projects, especially those starting closer to or after 2026, assessments will likely be conducted using the Home Energy Model.
The HEM introduces several key updates, including:
Use of half-hourly energy calculation intervals (vs. SAP's monthly averages)
Thermal zoning to assess how different areas of a building perform
Improved modelling of low-carbon technologies
Local weather and appliance efficiency data as inputs
These changes are designed to better reflect how homes perform in the real world and support the UK’s path to net-zero.
If you're starting a project now, you should proceed with SAP. The current regulations still require SAP assessments for compliance, and UKBC continues to provide fully certified SAP Calculations. As the transition to HEM approaches, we will guide you through the new requirements to ensure your project stays compliant.
SAP Calculations With UKBC
UKBC will guide you through the entire process of your SAP Calculations. In addition, our service includes consultation on how to make sure your project passes.
FROM
£75
* Please note that this is a guide price only - prices may vary depending on project size. Please contact us below for an accurate quote.