
What do we do
Part L SAP Calculations (Standard Assessment Procedure) constitute a crucial element of the Building Regulations, applying to all newly built residential properties throughout the UK. Mandated since 1995, the need for a SAP Rating, as per Part L of the building regulations, has become a firmly established practice embraced by the majority of developers.


Our calculations serve three primary functions:
SAP calculations serve several key purposes:
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They determine a SAP Rating, which quantifies the energy-related operational costs linked to a dwelling.
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They offer evidence of compliance with Part L of the building regulations.
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They enable the creation of an Energy Performance Certificate (EPC).
It's important to mention that SAP calculations might also be required for conversions or extensions, subject to slightly different regulations, and Scotland maintains its own specific requirements.
Pricing & Lead Times
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From just £99 per unit (no VAT)
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Average turnaround: 3 working days
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Same-day priority service available for urgent projects
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Every project is unique, so we provide bespoke quotes based on your drawings and specifications.
Important information to help you plan for your SAP Assessment
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SAP assessments play a pivotal role in comprehending your design. Ideally, we require accredited construction details and comprehensive, up-to-date drawings, preferably in electronic format.
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Please note that we are unable to utilize photographs, rough sketches, or watercolors. You may be requested to furnish a fairly detailed specification of your construction plans. This enables us to gauge the level of development in your design, determine fixed aspects, flexible elements, and areas that remain uncertain. With this information, your assessor can provide guidance and assistance to fill in any gaps.



Our process – how we ensure you meet the required standards
We recognize the significance of maintaining compliance with conversions, which is why we utilize SAP Calculations to verify if U-Values meet the standards outlined in all technical documents approved by the government. If these values fall short of expectations, we want to assure you that our team will provide guidance on the best course of action.
Moreover, we take extra measures to ensure that lighting and heating levels surpass the minimum requirements. If adjustments are necessary for compliance, rest assured that we will assist you every step of the way.
Simply download and complete our checklist, providing all the required information. We offer a fast and efficient turnaround for SAP calculations on extensions.
Helpful information you may need to supply?
For a smooth and efficient process, please ensure you provide the following information:
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✔ Floor plans, sections & elevations.
✔ Orientation details such as a site plan of existing elements.
✔ Construction specification for existing walls, new structures, roofs, and floors.
✔ Detailed specifications for all windows.
✔ Information on primary & secondary heating systems
✔ Details about any renewable technology (if applicable).
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If you have any questions or need further assistance, please don't hesitate to call us at 0800 999 1151. We're here to help!
What is included?
We offer a comprehensive range of services to ensure compliance with Building Regulations:
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✔ Provision of all SAP calculation documentation required from Design (PEA) to On Construction stage.
✔ Additional recommendations provided if needed to ensure a successful outcome every time available.
✔ Ongoing advice and support throughout the entire process available.
✔ Quick turnaround times to meet your project deadlines.
✔ We are more than willing to liaise directly with your Builder, Architect, or Building Control Officer for seamless coordination.
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Your satisfaction and compliance are our top priorities. If you have any further inquiries or need assistance, please feel free to reach out.
Frequently Asked Questions – SAP Services
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How much do SAP calculations cost? - Our fees start from £99 per unit. The final price depends on the size and complexity of your project.
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How long does it take? - Standard turnaround is around 3 working days. We also offer a same-day express service.
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Do you handle conversions and extensions? - Yes. We cover new builds, conversions, and extensions, including highly glazed designs.
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What happens if my design fails its SAP assessment? - We will advise on practical adjustments to bring your project into compliance, without unnecessary design changes or costs.
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Where can I learn more about how SAP calculations work? - Check out our detailed guide: What Are SAP Calculations?