about us

Evidence-based Design for deeply sustainable buildings

Our history

During Hannah’s work at a large engineering consultancy, she increasingly felt that building services was not joined up to building design and this was leading to overly complex mechanical and engineering solutions not suitable for the building use or occupants. 

Whilst Toby was finishing his MSc and was considering his next move, the idea that they could do this better took hold. During a sailing trip around the west coast of Britain the philosophy for Greengauge was formulated, with the main intention of bringing building physics, building services and building design closer with a more integrated approach.

Starting small, on a houseboat, Greengauge has grown to a team of highly experienced engineers and building physicists who work to make buildings more efficient from the ground up.

Toby Cambray Headshot website

Toby Cambray

Toby is a founding director and leads the building physics services at Greengauge. 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. He is a member of Technical Working Group 1 (Modelling and Monitoring) for the Centre for Moisture in Buildings, and is a regular guest lecturer at UWE. Adam Lane LinkdedIn link

Hannah Jones Headshot website

Hannah Jones

Hannah is a founding director and leads the mechanical and electrical design services at Greengauge. After graduating from Warwick University with first-class honours in Engineering Design and Appropriate Technology (MEng), she gained experience with Halcrow before starting Greengauge. Hannah has a very broad range of experience and skills, and brings to bear her deep understanding of fabric performance in designing simple and robust services in harmony with each building. Adam Lane LinkdedIn link
Read more about Hannah in our Staff Spotlight

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Adam Lane

Adam has been a Building Services Engineer for 12 years, originally based in London and more recently the South-West. Having moved from large Building Services consultancies like WSP and ARUP he 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.  Adam Lane LinkdedIn link Read more about Adam, in our Staff Spotlight


Emma Headshot website

Emma Mathias-Jones

An experienced Building Physics/Sustainability Engineer with over five years’ experience. Emma helps manage the Building Physics team, is an AECB certified Passivhaus Designer and Low Carbon Consultant. She undertakes overheating risk assessments, Dynamic Simulation Modelling (IES VE) for Part L calculations, and often helps with the early stage M&E energy strategy reports. Holding a degree in Architecture and Environmental Design from University of Nottingham (MEng and RIBA Part 1) allows her to take a broad, holistic view of building design and low energy optimization. She is currently working towards becoming a Low Carbon Energy Assessor (LCEA), making the office zero-waste, as well as learning more about the circular economy and retrofits. Adam Lane LinkdedIn linkRead more about Emma in our Staff Spotlight



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Oscar Garcia-Mendez

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.). Oscar is interested in improving the way the information is provided, always looking for more precise, robust, and understandable ways of communication, enabling a smooth journey through the BIM process. He is passionate about the latest technologies and believes IoT (Internet of Things) needs to be adopted rationally in new and existing constructions. He is also in the process of designing and building Greengauge’s own energy monitoring equipment. Adam Lane LinkdedIn link Read more about Oscar in our Staff Spotlight

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Kasper Maciej

A Building Physics engineer with three years’ experience. Kasper holds a degree in Architecture and Environmental Engineering (BEng and RIBA Part I) at UWE and is currently undertaking his ARB/RIBA Part 2 architecture course also at UWE. He aims to develop a mix of skills, in both architecture and engineering, to achieve better design.Adam Lane LinkdedIn linkRead more about Kasper, in our Staff Spotlight


Mitch Headshot Nov19

Mitch Finn

Mitch is a Building Physicist, carrying out thermal modelling for Passivhaus, Part L, EPCs and overheating, as well as thermal bridging calculations. Mitch has a masters in Renewable Energy and Energy Management, and qualifications as a Passivhaus Consultant, On Construction Domestic Energy Assessor and a Level 5 Non-Domestic Energy Assessor.

Adam Lane LinkdedIn linkRead more about Mitch, in our Staff Spotlight


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Jack Preece

Jack graduated with a masters in Civil and Architectural Engineering from the University of Bath, along the way gaining experience in a range of engineering firms from working as a site engineer to being part of international design consultancies. Jack is a Certified Passivhaus Designer and makes use of a range of software to assess the building fabric for interstitial condensation risks and thermal bridges. He enjoys taking a holistic approach to a project assessing mechanical systems that work in conjunction with the building fabric to produce a design responsible for low levels of operational and embodied carbon.Adam Lane LinkdedIn linkRead more about Jack, in our Staff Spotlight

Olivia Headshot website

Olivia De Sousa Costa

Olivia is a building physicist. Her focus is on assessing hygrothermal risk within buildings – both via numerical simulation using the Wufi Pro software and by material characterisation testing. She also carries out thermal modelling for Passivhaus and thermal bridging calculations. Olivia is helping to develop and build Greengauge’s own automated energy monitoring system. She holds a masters degree in Natural Sciences with a focus on physics and chemistry from the University of Bath.

Read more about Olivia, in our Staff Spotlight

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Louis Dawson

Louis has joined Greengauge as a Trainee CAD Engineer. He studied mechanical engineering level 2 at Bath College before joining us. He is currently learning how to develop lighting calcs and the fundamentals of 3D modelling. Adam Lane LinkdedIn linkRead more about Louis, in our Staff Spotlight

Hannah Rayner Headshot Oct2019 website

Hannah Rayner

Hannah is our Office Manager and heads up our marketing. She holds a degree in English Literature from Southampton University and has experience in marketing for the cultural sector and in events management.  She assists with business development and also ensures Greengauge meets all necessary Management and Auditing requirements.  Hannah has recently been awarded the Certificate in Professional Marketing from the Chartered Institute of Marketing. Adam Lane LinkdedIn link