What We Are

Welcome to Yonder

We’re a specialist team of building physics engineers.

That means we’re experts on building performance, specifically:

• The indoor environment
• Energy consumption
• Carbon emissions

We work with construction professionals such as:
• Architects
• Project managers
• Contractors

We deliver significant benefits to their buildings, including:
• Lower construction costs
• Reduced running expenses, through improvements such as decreased energy demand
• A better indoor environment

We use the latest technology to:
• Contribute to a building’s passive design – its use of natural elements, like the sun, for heating cooling, ventilation and lighting.
• Lead its active design – its use of non-natural elements, such as boilers and electric lighting, for these purposes.
• Define its ideal renewable energy sources

So we do far more than just validate existing designs.

Unusually, we’re independent and therefore not constrained by being part of a mechanical and electrical design consultancy. This freedom allows us to:
• Focus fully on our field of expertise
• Ensure passive design is rightfully prominent in a project, which maximises benefits for clients
• Deliver unbeatable customer care and service

You can find out more about us, our services and our projects on this site.

You can also find details of how to contact us, if you’d like to know more about our methods and the advantages we provide. We’re based in Yorkshire, but work on projects across the UK.

Why We Do It

The Vision for the Business

We believe you can’t make a construction truly sustainable unless the internal environment, energy consumption, carbon dioxide emissions and building economics are balanced.

That means internal comfort should never be diluted by factors like energy efficiency and costs, though these are equally important. Yet in too many projects this watering down is exactly what happens.

Our balanced approach echoes the internationally recognised definition of the three pillars of sustainability.

Who We Are

Rob Gill

MEng (Hons) CEng MCIBSE


I founded Yonder in 2012 as I’m passionate about truly holistic and sustainable building design. That’s because this produces internal comfort, while demanding little energy or extra cost. The key to achieving these aims is building physics engineers using dynamic simulation modelling (DSM) software to put passive design – utilising nature for heating, cooling, ventilation and lighting – first and reduce the need for building services.

DSM simulates energy flows, around and through a building, enabling us to predict its thermal environment and energy consumption. Yonder is based on building modelling and delivering true building physics solutions, through training and developing staff, plus using the latest technologies, including software.

Nathan Evans



I have a passion for problem solving and the built environment, which led to me joining the industry in 2007. Since then, I’ve focused on using building physics to deliver constructions meeting client aspirations while remaining within budgets.

I’ve worked on a wide variety of projects, including commercial, leisure, education and industrial schemes, advising on building energy performance, human comfort and planning requirements.

I’m responsible for overseeing our ever-growing team of building physics engineers and sustainability specialists, ensuring that projects are delivered on time, whilst maintaining the high standards we pride ourselves on.

john-heap non exec director

John Heap


Non-Executive Director

John has over 30 years’ experience in engineering consultancy, whilst his background is electrical engineering, his primary focus has been on business leadership, risk management, influencing behavioural and cultural change as well as seeking to improve commercial control. He has held senior governance roles on a number of major business initiatives, as well as commercial and industrial projects globally.

In his role as a Non-Executive Director John is able to leverage his experience and thus challenge the norm by bringing different perspectives, he mentors senior management and assists in setting the vision and strategy to maintain the continued growth and diversification of Yonder.

Heather Cawthorne

Practice Manager

I support the team in providing clients with outstanding building physics engineering solutions and great service…not just lip service. Customer care and administration have always been key to my roles and I enjoy working in, and understanding, all aspects of a business – its culture and clients, what it does and how it does it. I have overseen projects throughout the world and was a director of my own company for eight years, so have first-hand appreciation of life on both sides of the fence.

Join Us

We are constantly on the lookout for like-minded people to join our business. We’re looking to become the first choice Building Physics specialist in the UK so this is a great place to advance your career. We offer challenging work, meaningful CPD/development opportunities and flexibility that’s hard to match. If you are interested in joining our workplace then please complete the application form below:

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Our Values

You. We’re customer focused, working with clients to build long-term, mutually beneficial partnerships. We understand how our decisions affect our customers and honour our promises and commitments.

Openness. We’re always open, honest and respectful to our colleagues and clients, as integrity is one of our core values.

Nurturing. We encourage our engineers’ self-development and invest in their education and learning. We believe that by helping our staff improve, we enhance our customer service.

Dissemination. Communication is the tool through which we add value to projects, by delivering great designs and collaborating with clients, for example.

Evolution. We champion innovation, to improve our processes, quality and delivery speed. We invest in research to better understand low energy design and a low carbon economy.

Respected. We strive to lead our field, are proud to be building physics engineers and take pride in all we do.

Our Accreditations

On the CIBSE Low Carbon Consultants Register

This Chartered Institute of Building Service Engineers accreditation confirms we’ve passed exams and are officially competent to minimise buildings’ energy use and carbon emissions. That includes by going beyond legal minimums. We achieve these reductions for new or existing buildings via their design and operation. Clients can rest assured that our projects comply with Part L of Building Regulations, covering conservation of fuel and power. Building control officers can sleep easily too, as our status means we’re professionals qualified to sign off compliance.

BREEAM Accredited Professionals

The Building Research Establishment Environmental Assessment Method (BREEAM) is the world’s longest-established system for assessing, rating and certifying a construction’s sustainability. This status recognises our skills in sustainability and environmental design, plus our substantial competence in the BREEAM assessment process. Engaging an accredited professional at a suitable point in a project secures up to three BREEAM 2011 credits but the expert’s real value lies in their advice on increasing the BREEAM score.


The Goldman Sachs 10,000 Small Businesses UK programme

We’ve completed this programme, designed to provide high-quality, practical education and business support to leaders of fast-growth small companies and social enterprises across the country.

Our Awards

First Direct Arena, Leeds

This won the RIBA Yorkshire Award. We were energy assessors for BAM Construction.

Alconbury Incubator Building

This flagship building of Huntingdonshire’s Alconbury Enterprise Campus won RIBA’s East Award. We were energy assessors for construction company Kier Eastern.

The Bridge at Lake View House, Dartford

This Kent development was shortlisted for the RIBA South-East Award. We were energy assessors for Winvic Construction.

DC1, Prologis Park, Dunstable

This Bedfordshire distribution centre was shortlisted in the Building Research Establishment Environmental Assessment Method Awards at both the interim and final stages. We were building physics engineers for Winvic Construction.

Hitachi Rail Europe, Newton Aycliffe

This County Durham development won the Best Sustainable Manufacturing and Assembly Facility category of the 2016 Sustainable Building Awards, operated by Build magazine. We were Building Physics Consultants. We also won the UK Building Physics Consultancy of the Year prize in these awards.