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UK Coverage

Based from our head office in North Hertfordshire, we co-ordinate our team of UK-wide based air, sound and vent test engineers, SAP & SBEM energy assessors to ensure we can provide a prompt and efficient service for your needs.

We offer full UK-wide coverage for our range of building compliance services, often with as little as 24 hours notice. 

Wherever you may be, we are here to help!

Our fully accredited assessors are available to provide SAP Calculations on a nationwide basis QUICKLY AND EFFICIENTLY for you. SAME DAY service is available please Call NOW

Over 27,000 SAP assessments have been carried out by ATSPACE. We pride ourselves on delivering beyond compliance with 95% happy feedback.

Our Dedicated Account Managers and EXPERT assessors working in collaboration bringing in a 97% pass rate. The proof is in the pudding.

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Unit 3 & 4, The Cokenach Estate, Barkway, Royston, Hertfordshire SG8 8DL

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Dedicated account manager


- Delivering over 27,000 SAP Calculations

-12 year's  experience in getting Compliant

-New Build




Part L Compliance:   Meeting Current Building Regulations 

SAP Calculations are compulsory when constructing or creating new residential dwellings  that are required to meet Part L of Building Regulations

The method and requirements look at a multitude of different aspects of the build and sets a target needed for energy efficiency.

In preparation and for the calculation we will undertake the SAP (Standard Assessment Procedure), PEA (Predicted Energy Assessment), New Build EPC (Energy Performance Certificate) along with heat transfer measurements and water calculations if needed too.  

When we work with you, we will ask you simple questions to help turn around your request as soon as is possible and our energy assessors are here to help you at all times. As we are one of the UK's leading SAP Calculations businesses with over 220,000 calculations, you can be assured that you are always in safe hands.

We're always here to help you at all times and a lot of our clients opt for us to complete their SAP calculations, along with all of their compliance services so that we can work out bespoke packages to include all services needed such as air, sound, vent testing and water calculations too.

We're here to assist you as small things can make a big difference when it comes getting everything right first time, every time.



“We received our SAP Calculation efficiently on time and on budget! Have worked with ATSPACE for many years now as they are simply the best at what they do, thanks again!”

“I would like to thank ATSPACE for the SAP Calculation. ATSPACE really do deliver beyond compliance and are always supportive throughout the whole project."

"First of all can I say that the service that I have received from ATSPACE has been second to none.

The Engineer that carried out the works on site was an excellent Ambassador for the Company, again being very helpful and professional while carrying out SAP"

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Paul Whiffin

ATSPACE Managing Director

SAME DAY SAP Calculation

Paul Whiffin has developed ATSPACE as a leading provider for various design, consultancy and compliance services, ranging from self-builders through to national house builders.  As a developer himself, he understands the pain and as a reflection built an enviable company which has grown over a decade.

As an EXPERT in his Field, along with working closely with accredited On-Construction Domestic energy assessors (OCDEA) for carrying out SAP calculations, he is able to guide his team to achieving high results with customers satisfaction at the forefront of every job. He was involved with the first commercial care home to reach passive house standards, from design through to practical completion, with a successful outcome.

Paul’s experience expands over 10 years, he has trained his home-grown account managers to handle multiple disciplines to assist builders, developers, architects and national house builders.

He is the managing director for one of the leading companies for this sector in the UK. He has achieved a 95% Happy Customer satisfaction score and 86% of his customers have returned to work with him on new and upcoming projects. 

He continues to build this empire to assist a strategic growth plan and to help maintain his clients, or partners as he refers them to. 

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Carlo Infanti


Gold Leaf Properties Ltd

Having worked with ATSPACE for over 6 years we find that they really are the most efficient and professional compliance company out there. ATSPACE deliver a quality service with expertise for SAP Calculations.

Nathan Page 


Olly Wigg


Bowson Leeway Homes

Justin Thompson

Managing Director

Company Undisclosed  

Achieving a 97% SAP Calculation Success Pass Rate

4.9  STAR Google Review

No.1 SAP Calculations Company in the UK