Industry-leading SAP and U-Value calculation software for the construction sector
JPA’s SAP and U-value calculation software and training allow you to create accurate thermal calculations and EPCs quickly and simply. Our industry-leading software is the perfect tool for energy assessors, architects and other property professionals. Our software is Government and BRE approved, with integrated features and supported with our fully accredited training.

Key Features
Government & BRE approved
JPA supply industry-leading Standard Assessment Procedure (SAP) and U-value software. Our thermal calculation tools provide accurate results and allow architects, energy assessors, designers and builders to demonstrate compliance with current building regulations.
Integrated tools
Ideal for use from the design stage through
to completion and issue of Energy Performance Certificates (EPCs) for new dwellings, JPA software can produce stand-alone SAP calculations, U-values and condensation risk analysis, and PV payback calculations (included free with SAP licence).
Accredited training
Our software is supported with effective training.
Our SAP course is exclusively linked to the Quidos EPC accreditation scheme and our U-value training is backed by the BBA (British Board of Agreement).
What our clients are saying…
We found the program very easy to use, and their technical support is also helpful along with their training manual. The software is regularly updated to coincide with various construction updates, and methods of calculation. The product data base is constantly modified to coincide with new construction materials.
Darren Ravago
I have been using JPA Designer for over 20 years and it always comes with top class support.
Ian Sheppard Thermal Solutions
The IES Virtual Environment integration with JPA-SAP is a collaboration that brings two best in class software tools together to address the UK Government’s drive to net-zero through building regulations.
Niall Gibson IES Testimonial
My involvement with JPA spans nearly 30 years across multiple companies. From JPA’s founder to newer staff members we have always had a great relationship which is professional but personable. The software does exactly as expected and I have used it to assist with technical queries and consultations which show that JPA trust and value their users knowledge and experience.
Paul Pickett PFP Consultants
I’ve used JPA U value calculator for several years now, It’s the industry standard and is accepted by Building Controls when deciding if a thermal element meets limiting U values for Building Regulations.
Steve Gater SMG Consultancy
Using the JPA software is user friendly with navigation and layout same. Problem solving when technical issues arise is swift with a clear explain in non technical jargon. We find the company easy to deal with getting to the bottom of issues with the minimum of hassle finding the team to have a pleasant, friendly, caring manor when a query may arise.
John Stobbs Energy Design
Great software and good technical support.
Mark Attlesey Thermcalc Limited
Our Clients
Any Questions?
Whatever your level of interest or experience, our team are always available to give you an answer – whether purchasing, training, or just stuck, get in touch and we’ll lend a hand
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