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SAP Calculations from a leading Energy Consultancy

Our experienced team of engineers are well-versed in all aspects of energy efficiency, so you can rest assured that whatever the project – whether it’s a Part L1A New Build or a Part L1B Conversion or Extension – your home will meet the required standards and be highly efficient. 

SAP Calculations from £80+VAT.

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If you would prefer us to call you back today about your quote, please send us a short message using the form below or email

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Save up to 50% compared to architects

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Services available nationwide. Fast-Track available.

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Approved accredited assessors

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Client Portal System - manage your job on the go

What is a Part L SAP Calculation?

Part L SAP Calculations (Standard Assessment Procedure) represent a mandatory component of the Building Regulations, extending to all newly constructed residential properties across the UK. The requirement for a SAP Rating, in accordance with Part L of the building regulations, has been in effect since 1995, making it a well-established practice among most developers.

SAP Calculations serve three primary functions:

  • They establish a SAP Rating, which quantifies the energy-related operational expenses associated with a dwelling
  • They provide evidence of adherence to Part L of the building regulations
  • They facilitate the generation of an Energy Performance Certificate (EPC)

If your project is located in Scotland, you’ll need to comply with the Scotland Section 6 Building Standards for successful completion. We’re here to help ensure that all standards are met and your project can reach its full potential!

Read more about SAP Calculation Factors

SAP calculations are all about quantifying two crucial factors: the Dwelling Emission Rate (DER) and the Dwelling Fabric Energy Efficiency (DFEE). These numbers lay the groundwork for:

  • A Target Emissions Rate (TER)
  • A Target Fabric Energy Efficiency (TFEE) rate

In England, the DER and DFEE values must undercut the TER and TFEE calculations. In Wales and Scotland, the focus is primarily on DER measurements.

If you’re planning to sell or rent your property, completing SAP calculations opens the door to generating an Energy Performance Certificate (EPC). This certificate is a legal requirement for all new builds.

Should your SAP calculation reveal that your dwelling emission rate falls short of compliance, fear not! Our assessors are here to provide actionable advice and guidance on any necessary adjustments to enhance your build’s energy efficiency, minimise energy consumption, optimise thermal elements, refine ventilation systems, hit CO2 emissions targets, and incorporate renewable technology elements.

Assessing these areas can give your dwelling’s energy profile a substantial lift, leading to reduced fuel costs and the acquisition of your coveted energy performance certificate.

SAP Calculations:
Frequently combined with the following additional services:
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Energy Statement

water testing

Water Consumption Calculation (Part G)

part o

TM59 Overheating Assessment

air testing

Air Pressure Testing

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Sound Testing

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Energy Performance Certificate (EPC)

ventilation testing

Ventilation Testing


If you need assistance ...

Hi, I'm Will, the Customer Relationship Manager, and I oversee every aspect of your customer journey. If you need any further assistance, please get in touch.

Ready to get started?

SAP Calculations from £80+VAT.
Same day quotes available.

Ready to ensure your building project meets the highest standards of energy efficiency? Contact Focus 360 Energy today for a bespoke SAP Calculation quote. Let our accredited professionals guide you to compliance and beyond, with expert advice, efficient service, and competitive pricing. Start your journey to a greener, more efficient future now.

Download our Service Guide

Download our guide to the multiple services you may need for each stage of your project.

Services from Concept Doc V3

Our SAP Process makes it easy for you.

We want the whole process to be as easy as possible. On acceptance of a quote, you'll be emailed a simple checklist that can be completed online - no complicated PDFs or documents downloads that need to be completed and then returned!

To see the type of information required, view the example below.


Schedule your EPC

Schedule your appointment

Now that you’ve approved your quote in our online portal, you can schedule an appointment with the surveyor.


Schedule your EPC

Assess your plans and specifications

We will provide you with an online questionnaire to complete and are more than happy to coordinate directly with your architect and builder.


Schedule your EPC

SAP Design Stage Calculations

Our expert SAP Assessors will calculate and produce your Design Stage SAP Calculations.


Schedule your EPC

Guidance for pass (if applicable)

If required, we will provide guidance and advice to help you achieve an energy efficiency pass.


Schedule your EPC

Complete your SAP Calculations and EPCs

Our team will complete and publish your As-Built SAP Calculations and EPC Certificates.


Schedule your EPC

Supply your documents

We take care of everything and provide you with all the necessary documents.

Further information:

How much are SAP Calculations?

SAP Calculations and assessments start at £80 per unit depending on the intricacy of the building and the size.

The cost of our services hinges on the dimensions and intricacy of your dwelling. Our preference is to offer bespoke quotes on a case-by-case basis, ensuring you get the most competitive pricing.

Connect with us and share your plans or accredited construction details today! Our energy assessment prices encompass a comprehensive package, covering lodgement and registration fees, expert advice on building regs compliance, iterative improvements, and the issuance of all supporting documentation.

Important information to help you plan for your SAP Assessment

SAP assessments are crucial in helping us understand your design. Ideally, we need accredited construction details and detailed, up-to-date drawings, preferably in electronic format.

We cannot use photographs, rough sketches or water colours! You may be asked to provide a fairly detailed specification for what you are building. This is so we can understand how advanced your design is, what is set in stone, what is flexible and what is completely unknown. Your assessor can then help you fill in the gaps and give some guidance.

Helpful information you may need to supply?

  • Floor plans, sections & elevations
  • Orientation e.g. site plan of existing elements
  • Construction specification of existing walls, new structures, roofs and floors
  • Specification for all windows
  • Details on primary & secondary heating systems
  • Renewable technology (if any)

Please call 0333 772 2798 if you have any questions.

What is included?

  • All SAP calculation documentation required for compliance with the Building Regulations from Design (PEA) to On Construction 
  • Additional recommendations if required to ensure a pass is achieved every time
  • Advice and support throughout the whole process
  • Quick turnaround
  • We are happy to deal directly with your Builder, Architect or Building Control Officer during our site visit

Frequently Asked Questions

1. What are SAP Calculations and why are they important?

SAP Calculations (Standard Assessment Procedure) is a mandatory requirement for all new residential properties in the UK, as per Part L of the Building Regulations. They quantify a building’s energy efficiency and are crucial for obtaining an Energy Performance Certificate (EPC) for selling or renting properties.

2. What stages of the building process do SAP calculations apply to?

SAP calculations are applicable at all stages of the building process, from planning (RIBA 0-3), through design and construction (RIBA 4-5), to completion and post-completion (RIBA 6-7), ensuring comprehensive energy efficiency assessment throughout the project lifecycle.

3. Can Focus 360 Energy perform SAP calculations for both new builds and conversions?

Yes, Focus 360 Energy is equipped to handle SAP calculations for both new builds (Part L1A compliance) and conversions or extensions (Part L1B compliance), ensuring that your project meets the required energy efficiency standards.

4. How can Focus 360 Energy help if my project does not meet the required energy efficiency standards?

Focus 360 Energy’s team of accredited assessors can provide actionable advice and guidance on making necessary adjustments to enhance your building’s energy efficiency, targeting improved thermal elements, ventilation systems, and incorporation of renewable technology.

5. What is the cost of SAP Calculations with Focus 360 Energy?

The cost starts at £80 per unit but varies based on the complexity and size of the building. Focus 360 Energy offers bespoke quotes to ensure competitive pricing tailored to your project’s specifics.

6. What information do I need to provide for a SAP assessment?

For a SAP assessment, detailed, up-to-date drawings or accredited construction details in electronic format are essential. Photographs or rough sketches are not acceptable.

7. How does Focus 360 Energy streamline the SAP Calculation process?

Focus 360 Energy simplifies the process with an easy-to-use online system, allowing clients to easily schedule assessments, manage jobs, and track progress without complicated paperwork.

8. Are the assessors at Focus 360 Energy accredited?

Yes, all property professionals at Focus 360 Energy are members of relevant trade accreditation schemes, ensuring expertise and compliance in their assessments.

9. Besides SAP Calculations, what other services does Focus 360 Energy offer?

Focus 360 Energy offers a range of services to enhance your building’s energy efficiency, including Residential Air Testing, Sound Testing, Ventilation Testing, U-Value Calculations, and more.

10. How do I get started with a SAP Calculation for my project?

To begin, contact Focus 360 Energy for a comprehensive SAP Calculation quote. Their team will guide you through the process, from initial assessment to final documentation.

SAP Calculations for all your building projects

If you are planning a New Build or Conversion, you may need additional services that our experts can assist with, for example Residential Air Testing, Sound Testing, Ventilation Testing, U-Value Calculations, Water Efficiency Calculations, Thermographic Surveys, Energy Performance Certificates, Part O Overheating Calculations, London Plan, Daylight and Sunlight Assessments and Thermal Bridging Calculations.

Get started to day and speak to us about the additional services you may need.

self builders

Part L1A
SAP Calculations for New Builds

All new dwellings must now have a SAP calculation performed at design stage in order to demonstrate compliance with Part L1A of the Building Regulations.


Part L1B
SAP Calculations for Extensions

If you build an extension where the glazing is over 25% of the floor area, then we can undertake SAP Calculations to demonstrate Part L1B Building Regs compliance.

builders and developers

Part L1B
SAP Calculations for Conversion

If you renovate a building such that there has been a material change in use, then we can undertake SAP Calculations to demonstrate Part L1B Building Regs compliance.

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