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...


Zero Carbon Homes - Changes to the London Plan Requirements

As of October 1 2016, the London Plan requirements for energy statements changed. Check out our latest Blog to ensure you are up to date. 

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We are recruiting...

Due to expansion, we have two very exciting opportunities for a Sales Executive and an Sustainability & Energy Consultant to join the Darren Evans team.  We are a friendly team based in Chipping Sodbury, Bristol.      

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The Best Of DarrenEvans - IM Insulate Magazine


It’s been quite a year since we started the U.K’s only dedicated magazine to promote the insulation indus- try, the response has been overwhelming and the level

of support from the entire construction sector has been phenomenal.

As you will see from the forthcoming pages, the partnership we have developed with Darren Evan Assessments has provided excellent content for our readers that is engaging, relevant and well written. 

Download full magazine here

Bat Survey Season Ends Soon

Our Ecology team have been busy carrying out Extended Phase 1 Habitat Surveys and Bat Building Assessments.  As the season for these surveys comes to a close in the next couple of weeks we wanted to remind you of the importance of getting your surveys booked in as quickly as possible.

If you have any sites which have the potential for bat presence and you are considering submitting a planning application in the near future, we would strongly advise you commission a Bat Building Assessment before it is too late. 

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The Crow’s Nest, Dorset

We are delighted to have worked on The Crow's Nest which was featured in today’s Metro and on their website.

You can read all about the project here.

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Our Team

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.