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“ATSPACE is everything and more. We really can’t thank them enough for everything they have done for us. Our SAP calculations were simple, stress free and with excellent results. We will, 100% be using ATSPACE for everything from now on.”

Robert Hunt

Quoted, booked and SAP Calculation certified in under days

We’ve Got You Covered

With our network of
Engineers across England
& Wales

Call Now for an Instant Quote or Advice

How Much?!

At ATSPACE, we like to be as transparent as possible. That’s why we’ve provided a breakdown of our costs for every service we provide. Simply click on the filter to find out what you can expect to pay when you select ATSPACE as your building compliance partner.  


SAP Calculation(s) New Build & Conversions

Desk Based Service

Design Stage


No of Plots First Plot Additional Plot(s)

EPC Per Plot

1 £237 N/A £23
2-10 £187 £83 £23
11-30 £127 £67 £17
31-50 £67 £57 £11
50+ £33 £33 £6

Cost Variances - Warm roof - Complex Shape - Super Large Plots - Property Already Constructed

Additional Bolt On Service(s)

U-value Calculations - Desk Base Service £29 Per U-Value
Condensation Risk Assessment -
Desk Base Service
£51 Per Assessment
PSI Values - Desk Base Service £117 Per PSI Value
Over Glazed Extension Calculation -
Desk Base Service
Air Leakage Testing - Site Base Service From £193

Don’t See The Value We Can Add?

Please get in touch with the A-TEAM on 0345 6465 454

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SAP Calculation Performed by Energy Experts
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Building Regulations Signed Off

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New Build Domestic EPC:
New builds, or dwellings created by a change of use or conversion will require a new build domestic EPC, or OCEPC.

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Existing Domestic EPC:
ATSPACE can and will help you to achieve the best rating on your EPC, giving you energy saving tips to reduce your energy usage and improve your EPC result.

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Energy Statements:
These are used to demonstrate how improved energy performance can be achieved.

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SBEM Calculations:
For all non-domestic buildings, the approved national calculation methodology, to calculate the energy efficiency of your build. 

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Uncomplicated Compliance

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100% Building Control Certified
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Elmhurst – STROMA Accredited

SAP stands for Standard Assessment Procedure, a government standard that's been in place since 1994. It was brought into the regulations to ensure that your building meets the criteria set out in Part L.

The SAP will determine your build’s average energy use, and this information will be incorporated into your EPC, Energy Performance Certificate. The SAP Calculation is for residential properties. If your build is non-residential, check out the SBEM page.

The SAP, just as with SBEM, has two stages, the design SAP and the as built SAP. The design SAP Calculation, unsurprisingly, needs to be completed, yes that’s right, at the design stage. The as built SAP Calculation needs to be completed once the build has been completed. When designing your project, it is always best to know what influences the SAP Calculation results. Knowledge is power after all. If you know what affects your results, you can improve them. ATSPACE has completed over 27,000 SAP Calculations, so we're confident in our ability to lead the way!

ATSPACE is your one stop Compliance convenience. All services under one room and all performed by the A-TEAM. Nothing is sub-contracted out. We have full control on all our certifications and speed of delivery. This is one of the reasons we are proud of having the most 5 star reviews in our industry.

SAP Calculations Made easy. Work with the A-TEAM to find out why we do have over a 97% first time Pass Rate

How do ATSPACE take the headache away from SAP Calculations?

How tot FAST TRACK SAP calculations and Gain compliance. Ask the A- Team NOW

Trusted by 9K+ businesses
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We want you to have a stress-free experience. I've set up ATSPACE to take the pressure off you, so you don't have to worry about your SAP Calculations. ATSPACE provides design, consultancy, and compliance for self-builders through to national house builders at any stage of your project.

  • • 250+ 5-star Google reviews,

  • • 97% First Time Pass SAP Calculations Rate

  • • Over 27,000 SAP Tests Completed

SAP, or Standard Assessment Procedure, relates to Part L of the Building Regulations. The government introduced it to calculate a building's energy and environmental performance. The SAP will also allow for easy comparison of similar style builds across the board. So, you can tell how eco-friendly your build will actually be. Your SAP will help determine the EPC Rating (Energy Performance Certificate) for your property.

A SAP Calculation is mandatory for all new builds, conversions and over glazed extensions.

There are two stages to SAP calculations: the first is completed at the design stage, and the second is completed at the as built stage. Work with ATSPACE at the earliest possible stage, and you can benefit from our wealth of knowledge!

ATSPACE has been established for over 10 years. I am fully qualified in SAP Calculations, and I have trained my enthusiastic Relationship Managers to be there for you, and with you, throughout the whole process.

I am determined to ensure ATSPACE is the go-to compliance company in the UK. Not only that, I want ATSPACE to regularly provide informative, interesting compliance information. If you have a question, ATSPACE will answer it!

Paul Whiffin ATSPACE
Managing Director


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SAP Calculations - Questions Answered

Ultimate Guide To Passing Your SAP Calculations

This video will give you the top tips to passing your SAP calculations!

How Do I Achieve An A Rating On My SAP Calculations?

When trying to achieve an efficient EPC rating of A, you should first look at the fabric of the build. It's all well and good having renewable technology installed on a property, but that's not going to reduce the energy requirement. So, how can you achieve an A rating?

Can A SAP Assessor Help Reduce Our Costs?

Materials have increased in price over the past couple of years and it's not just timber, we are looking at all construction materials such as your brickwork, your blockwork, your insulative materials especially and also, the mechanical services within the property. But can your SAP Assessor help to reduce costs?

Case Studies

Take a look at some of the many ways we’ve helped our clients achieve building compliance success on their projects.

“ATSPACE took control of our SAP calculations, and I am so pleased with the results. The whole process was easy, and we will be contacting ATSPACE again soon to work on our next project”

Sarah Biggs

Huge cost saving on materials and SAP Calculation certified

“ATSPACE was extremely helpful. I am a complete novice, but they took on everything, explained the processes clearly and were extremely friendly. We were recommended ATSPACE by Building Control. We are more than grateful!”

Jack Thomas

Same day communication
Same day quotation =
Next day fast track delivery

Customer Scope

Bring All Your Compliance Under 1 Roof. No work is Sub- Contracted out

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Whether you’re working on a residential or commercial development, rely on us to take care of all your design, consulting, compliance and certification requirements, whatever the stage of your project. When everything is under one roof, why go anywhere else?

Design & planning, part built, as built or energy certification, you can be confident that your project will meet compliance every step of the way. All work is done in-house by our team of dedicated engineers and energy assessors, so you can be sure of an efficient, thorough and top-quality service. To find out more about our multi-disciplinary service offering, simply select the service you require by clicking the icons below. In a rush? Contact us now and get put straight through to a technical expert who will handle your enquiry efficiently.

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