Retrofit design is a critical component of the government-approved PAS 2035 process, the standard for ensuring UK buildings are upgraded to be more energy-efficient and to lower their carbon emissions. A professionally developed design is the blueprint for a successful retrofit, guaranteeing a whole-house approach that is effective, compliant, and built to last.

As fully accredited PAS 2035 specialists, we offer a complete, end-to-end retrofit consultancy service, from the initial Retrofit Assessment and Coordination through to the final Design.

Our in-house team of experienced and knowledgeable Retrofit Designers are fully qualified as defined in PAS 2035. We deliver meticulous, bespoke designs for social housing developments, local authority or council projects, and private properties, ensuring every project meets the highest standards of performance and regulatory compliance.

Why work with us?

Experience

Our team possesses an in-depth understanding of the retrofit landscape, enabling us to develop tailored solutions for various property types and budgets.

Our experience in delivering successful retrofit projects across the nation speaks for itself. We have a reputation for delivering exceptional results on time and within budget.

Award-winning

We are proud to be recognised for our quality and commitment across the retrofit sector.

Speed

A well-planned design is the foundation of a successful retrofit.

Our design process is built on a foundation of technical expertise and meticulous planning, ensuring we deliver durable, compliant designs in a timely manner, preventing costly delays during the installation phase.

Pricing

Our rate card prices for all services are reviewed regularly, so we’re confident that you won’t find a better service for a better price anywhere else.

If you think you’ve found one, we’ll either beat or match it.

Support

Navigating the complexity of energy efficiency, decarbonisation, and building regulation updates can be complex. We’ve worked hard to explain a range of topics related to retrofit in plain English to help non-experts get the information they need.

Get Your Retrofit Design Quote Today!

Looking for retrofit design in Bristol or nationwide?

Contact us today for a free quote and to discuss your specific project requirements. We offer competitive rates and prioritise fast turnaround times for all our clients.

Thoughtful, fast-growing force in sustainable consultancy harnessing analytical theory to deliver multiple projects. Rightly gaining national recognition.

Judges, Bristol Property Awards 2025

Surveying an active shopping centre is logistically complex, but Building Energy Experts handled it with precision. Their report cut through the environmental variables to provide a clear distinction between maintenance quick-wins, like resealing doors, and the capital investment needed for insulation. It provided the exact technical evidence required to inform our roadmap to an EPC B rating and justify the retrofit budget.

Philip Emsley, UEC Energy – Thermographic Survey

In delivery of the Warm Homes: Local Grant programme in Shropshire, Building Energy Experts (BEE) have acted as invaluable partners to the Council. Their expertise in reviewing installer designs and liaising with our consortium of local installers has ensured the technical compliance and appropriateness of measures installed under the scheme.

The Council’s goal was to find a critical friend that ensures best practice and full PAS2035 compliance under schemes it delivers – BEE have brought this in spades, accompanied with a professionalism and pragmatism that has been indispensable in navigating the nuances and complexities of local authority led, domestic retrofit schemes. I would highly recommend engaging with BEE to any council or social housing provider considering an independent retrofit coordination model.

Merrick Rose, Affordable Warmth & Energy Efficiency Support Officer, Shropshire Council – WH:LG Retrofit Coordination

This entry provides clear evidence across multiple projects where Building Energy Experts has successfully forged strong partnerships, driving innovation and delivering outstanding outcomes.

The organisation is more than a service provider; it is a trusted supply chain partner helping the built environment sector achieve real, measurable progress towards net zero by delivering tangible reductions in emissions, better energy performance and long-term cost savings. With a proven track record, cutting-edge technology and a sustainability-centred ethos, Building Energy Experts stands out as a transformative force in retrofit delivery.

Judges, Unlock Net Zero Awards 2025

I should like to say thank you so much to Rich and the team at Building Energy Experts for their efficiency and helpfulness in completing our commercial EPC survey in record time.

Assessing a historic property like Walton Castle requires real expertise, and your team delivered exactly that. Not only did they complete this survey with a very quick turnaround but they went above and beyond by providing extra information and guidance which has been extremely helpful.

We are delighted with the final result and once again thank you from both myself and the team at Walton Castle.

Margarita Hamilton, Walton Castle – Commercial EPC

What a great service you provided! As Self-Builders, with a great deal of red tape/bureaucracy to satisfy, you truly made this a real ‘value-add’ and reasonably priced exercise. We thought we were in reasonably good shape (having taken a lot of care and time on our build), but the checklist provided in advance of the test and the report post test, were really helpful in making improvements to the fabric of the building.

Tim Overton, Self-Builder – Air Tightness Test

Our PAS 2035 Retrofit Design Process

Our design process is rigorously aligned with the PAS 2035 standard. Your dedicated Retrofit Designer will:

Our Retrofit Design Service Deliverables

When you work with us, you receive a complete package of design documentation ready for the next stage of your project. This includes:

Get Started on Your Retrofit Project

Our friendly team is ready to provide expert advice for your project. Whether you need a free consultation to discuss your options or a competitive quote for our design services, we are here to help.

For more information, take a look at our other specialist services, or contact our experienced team directly who can advise on the best approach.

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