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Energy assessments & Part L building regulations

The UK’s Leading Specialist in Energy Assessments, Building Regulations & Onsite Testing

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An Introduction to Energist

You probably don’t like Part L building regulations. Sure, you can see why they’re needed – you might even have a passion for sustainable construction – but when the paperwork piles up and the jargon jumbles you, it becomes hard to feel good about building green. That’s why you come to us…

We provide a full suite of assessments, consultancy and training to guarantee you an energy efficient, sustainable build, compliant with UK Regs. No matter what you’re building or where, we can save you time, money and, most of all, energy.

Our Services & Expertise


Come inside if you want to build an airtight, efficient home.

Residential Services


Get to grips with SBEM, BREEAM or anything in between.

Commercial Services

Knowledge Bank

Unscramble the Regs with our free news, articles and guides.

Knowledge Bank

New London Office

Our dedicated office is just a call or a tube away…

Making London Better