We are an ambitious practice of building services consultants.

With offices located in Oxford, London, Manchester and Cambridge, we are independent and wholly owned by Directors who take a hands on approach to running projects, and have collectively worked together for over 25 years. We cover a wide range of Mechanical and Electrical Engineering solutions specialising in Lighting Design, Sustainability, Building Physics and Passivhaus.


“To be a leading consultancy delivering excellence in building physics and engineering for better buildings that benefit their occupants and the environment.”

CBG Values

Professionalism – The way we work
Excellence – In the quality of our work and dealings
Respect – The way we treat people and the environment
Recognition – of talent and achievements
Knowledge – Being experts in building physics and engineering