SAP Calculations

SAP Calculations are a Building Regulations requirement for all new residential developments,...


SBEM Calculations

A SBEM Calculation (Simplified Building Energy Model) is used to calculate the compliance of your...

Darren Evans Assess

Provides a nationwide comprehensive range of energy efficiency & sustainability services for architects, developers, HA's, and commercial and domestic landlords
RGB's Bodmin branch celebrates first anniversary #energyefficiency

14 hours ago. via SocialHootz • 8 retweets

Oliver overjoyed with Selco's special delivery #energyefficiency

15 hours ago. via SocialHootz • 5 retweets


Our team

Darren Evans Managing Director

Darren Evans is the Managing Director and started the company in 2007 to provide comprehensive, hassle free energy and sustainability services throughout the UK.

Michael Brogden Technical Director

Michael has been a Director since 2008 and is an expert in his field; delivering sustainability assessments within the built environment across all sectors. He heads our technical team and is an Accredited Professional, BREEAM Assessor, and CfSH Assessor with a breadth of in-depth knowledge.

Marcus Eves Technical Lead

Marcus is a highly skilled and experienced Sustainability Consultant with a strong interest in both the theory and practical implementation of energy efficient design. His expert knowledge in sustainable legislation coupled with his dedication and sound advice will ensure that all sustainable opportunities and/or enhancements are identified and acted upon.

Graham Suttill Technical Team Leader

Graham has vast industry experience and great knowledge of sustainable construction methods and renewable technologies, and has a keen interest in climate change. He is an avid learner and likes to keep on top of new developments within the built environment; he is also our technical team leader.

Brandon Wipperfurth Sustainability and Energy Consultant

Brandon has over five years’ experience in energy consultancy and has a Masters in Environmental Sustainability, and BSc degree in ecology and environmental biology.

Angela Wood Code for Sustainable Homes Assessor

Angela has a wealth of industry knowledge and has numerous years’ experience as a SAP Assessor and a Code Assessor, working on a vast amount of design and post construction assessments.

Katie Smart BREEAM Assessor & Ecologist

Katie is a BREEAM Assessor and a qualified Ecologist with over 4 years’ experience in the industry.

Liam Hanley Energy Assessor

Liam has been working in the Energy Sector since 2010. He has a huge knowledge in Sustainability Energy. He is a qualified Domestic and Commercial Energy Assessor.

Nathan Boyle Energy Assessor

Nathan is an energy assessor with 3 years’ experience in energy consultancy in the domestic and commercial renewables sector. He has a BSc Hons degree in Renewable Energy from the University of Exeter.

Simon Evans Energy Assessor

Simon has worked in the energy and sustainability industry since 2012. Simon has recently moved from our account management team in to our technical team. He is great at establishing relationships and brings this knowledge across in to his new role.

Anthony Dale Energy Assessor

Anthony is one of our Energy Assessors who, through his broad knowledge base, can help our clients achieve their goals with both new build domestic properties and L1B SAP calculations. With a background in renewable technologies Anthony is also well placed to advise customers who might be employing renewables on their build.

Michelle Clark Office/HR Manager

Michelle joined us in 2008 from the legal environment. Michelle manages general office procedures and heads up HR where she develops and implements HR strategies and initiatives aligned with the overall business strategy.

Emma Brooke Senior Business Support

Emma joined us in 2013 from the Insurance & Legal environment. Emma provides administration support across the whole company and is also our Salesforce Champion (our data management system expert).

Oliver Janes Business Support

Ollie has joined us as part of our Apprentice programme and works across our account management and technical teams. Ollie is also studying towards his Business Administration Apprenticeship.

Sophie Pine Business Support

Sophie has joined us as part of our Apprentice programme and works across our account management and technical teams. Sophie is also studying towards her Business Administration Apprenticeship.

Our Values


we turn problems in to solutions in a pragmatic and innovative way, saving you both time and money whilst adding value to your project.


we see ourselves as part of your team, communication is important to us especially as projects can be so fluid with changes taking place at all stages.


we really care about our projects, our clients and our team. We are reliable, and always go that extra mile.


we are open and honest, we value your business and everyone we work with. We will help to deliver solutions that work with your best interest at heart.