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We are experienced in new build and refurbishments in both the domestic and non-domestic sectors.

Physics and thermal dynamics drive our philosophy and we approach our projects ‘Fabric First’ to deliver buildings that are comfortable, simple and efficient. We work on new-build and existing buildings optimising insulation, fenestration and thermal bridging to produce robust buildings with minimal systems necessary to maintain comfort.

Passionate about sustainability

We are passionate about delivering sustainable buildings that satisfy the occupants’ comfort, with the controls most appropriate for them. We are completely independent of manufacturers, products and installers so can provide objective advice, backed up by a suite of software tools and research. By optimising the insulation and fenestration, and designing for maximum air tightness and minimum thermal bridging, we aim to produce a shell into which simple, robust, minimal systems are added to ensure comfortable conditions can be maintained.

Greengauge Building Energy Consultants
Suite 3
Second Floor
The Old Brewery
Bradford on Avon
BA15 1NF

Professional accreditations


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The Lighthouse
The Lighthouse

2 Photos

This project is a new dwelling at existing accommodation and venue hire facilities. Planning permission was granted through the…

Dursley Treehouse
Dursley Treehouse

3 Photos

Built on a small plot in the centre of Dursley, this certified Passivhaus was designed to have minimal impact on the surrounding…

Brewery Arts Centre Youth Hostel
Brewery Arts Centre Youth Hostel

4 Photos

Finalist - Passivhaus Trust Awards 2018 This Cotswold stone building was originally a warehouse for the adjacent brewery, then…

Challender Court
Challender Court

1 Photos

WINNER of the RIBA South West Award for Sustainability 2018. Greengauge worked with Emmett Russell on Bristol City Council's…

Goldsmith Street - RIBA Stirling Prize Winner
Goldsmith Street - RIBA Stirling Prize Winner

5 Photos

The Goldsmith Street development for Norwich City Council (NCC) is now multi-award winning, however the ground-breaking scheme,…

Fabric First Conversion of Stone Barn
Fabric First Conversion of Stone Barn

4 Photos

WINNER - Heating & Ventilation News Award 2019  (Retrofit of the Year) Bibury Farm – a cluster of handsome Cotswold stone…



Toby Cambray


Toby is a founding director and leads the building physics services. He holds a BEng in Acoustical Engineering and an MSc in Theory and Practise of Sustainable Design. He is experienced with a variety of tools for assessing whole-building energy efficiency, component performance and moisture risk assessment.

Hannah Jones


Hannah leads the mechanical and electrical design services at Greengauge. After graduating with a first-class honours in Engineering Design and Appropriate Technology (MEng), she gained experience with Halcrow before setting up Greengauge. She brings to bear her deep understanding of fabric performance in designing simple and robust services.


Adam Lane

Senior Building Services Engineer

Having moved from large building services consultancies, Adam has widened his understanding of building services to low energy buildings and appreciates the benefits of building fabric in achieving this goal. Adam likes to keep things simple when designing M&E systems wherever practical and has interests in Bau Biology.

Emma Mathias-Jones

Building Physicist

Emma is an AECB certified Passivhaus Designer, Low Carbon Consultant, Lighting designer, she undertakes the Dynamic Simulation Modelling (IES VE) for Overheating and Part L calculations. Holding a degree in Architecture and Environmental Design (Meng and RIBA Part 1) allows her to take a broad view of building design and low energy optimisation.

Oscar Garcia-Mendez

Building Services Engineer

Degree qualified mechanical engineer and experienced building services engineer. Oscar is a specialist in 3D/BIM software such as ArchiCAD and he makes every effort to integrate and co-ordinate M&E design with other disciplines (architecture, structure, etc.).

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