Your Specialist Energy & Environment Advisory Service

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25 years of experience in energy & environment management, communication and training. Offering a bespoke service to organisations of all sizes across the UK


Building & Construction Industry

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Energy & Environmental Services

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Training for Individuals & Organisations

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Contact Third Stone

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Leading expertise in delivering energy services to a wide range of organisations...

Architects, Builders & Developers

SME & Corporate Businesses

Local Authorities & Public Sector

Property Managers & Landlords

Schools & Universities

Offering a bespoke and tailored service. From advice on energy-efficient building design and improvement for new and existing buildings, to reducing your organisation's energy costs.

Client feedback & recommendations

Dave Birch, Trustee, Kibworth Grammar School Hall.

"Third Stone Ltd’s survey included a section for reducing energy usage which we could adopt immediately with no financial outlay. In the longer term there were recommendations regarding wall and roof insulation, double glazing, thermostats, lighting etc. The document will form an important part of our future planning." Dave Birch, Trustee, Kibworth Grammar School Hall.

Clive Voller Associates Ltd

"Third Stone Limited make light work of dealing with Building Regulations. They always manage to find a way to make our designs comply which enables us not to be constrained by the ever increasing thermal requirements." 

Mark Watts RIBA of Mark Watts Architects Ltd

“The service we received was extremely helpful. Third Stone Limited assisted us in achieving the required outcome at a reasonable price” Mark Watts RIBA of Mark Watts Architects Ltd

Divyesh Jansari

“I was happy to commission Richard (Third Stone Limited) in 2007 to undertake an independent review and environmental assessment for the establishment of a climate change agency. He delivered an excellent piece of work that was delivered on time and to budget. More importantly, the quality met client expectations and resulted in the establishment of the Birmingham Climate Change Agency.”

Sarah Evans,  Solihull MBC

Solihull Council has been working with Third Stone for many years know. The service provided has been excellent and always delivered on time with professionalism and attention to detail.  Richard is very knowledgeable about the industry and answers all of our questions promptly, and efficiently, he is also very approachable and easy to work with. We are very happy with our service

Petra Molthan-Hill, Nottingham Business School

“Richard delivered teaching to undergraduates and postgraduates in Greenhouse Gas Management and Sustainable Business at Nottingham Business School for several years. I have no hesitation in recommending Richard for teaching and training in connection with energy and sustainability issues.”

Richard Schofield, Phlorum

‘We are very pleased with the level for service that Third-stone provide. Their service is efficient, reliable and helpful. We would have no hesitation to use them again and to recommend them to others’. 

Gary Tyldsley, Nottingham Industrial Cleaners

“We have had our ESOS Assessments completed by Richard of Third Stone Ltd and found him to be very thorough, knowledgeable and efficient. A very good professional service. “ 


Excellent standard of training. Richard style is extremely thorough and he is very knowledgeable about what he is teaching. I believe I have received a high standard of teaching and had the best start possible as an energy assessor. 


The trainer was fantastic. Very knowledgeable, engaging and took time to answer any questions. I honestly could not fault the training and probably one of the most informative trainers I’ve come across in years.


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Third Stone is run by Richard Holmes MSC, MEI, MIEMA, C.ENV, a Chartered Environmentalist and Low Carbon Consultant. Not only is Richard here is save companies money, but he is also a passionate environmentalist, who actively seeks to reduce the impact commercial organisations have on our environment.


Compliance & Certificates



Third Stone's Background & expertise

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Richard not only works directly with companies but he works as an in-demand expert across the UK, delivering specialist training and lectures in the areas of energy efficiency and reducing carbon footprint.  More about Richard's Background & CV >

Based in the East Midlands but covering the whole of the UK


  • Low Carbon Consultant-01

    Low Carbon Consultants Register

    Set up by CIBSE and The Carbon Trust, this register can only be joined by consultants who have proven competence in the energy efficient design and operation of buildings. 

  • ISO 50001-01

    Energy Management Systems ISO 50001

    The Low Carbon Consultants Energy Management Systems register is exclusively for professionals who have demonstrated competencies to enable them to implement a fully compliant and certifiable Energy Management System, meeting the requirements of ISO 50001. This is a highly valued and sought after status.