Award Winning
Chartered Building
Completely Independent,
Best Practice Approach
to Low Energy Building.
Constructing Excellence
'Achiever of the Year' 2013.
One of
Building Magazine's
50 Rising
Stars of Sustainability.
Construction News
Specialist Awards

Project of the Year
<£500,000 2014.
Low Energy & Passivhaus
Project Management.
Finalist: 3 Categories
Constructing Excellence 2013.

Project + Achiever of the Year
+ Leadership/People Development.


"Our unique solutions for very low energy   
and Passivhaus project management are underpinned   
by informed decision making and a deep commitment to best practice."

Trunk is a Chartered Building Consultancy:

  • Dedicated to delivering very low energy and Passivhaus homes 
  • Expert in both new build and refurbishment projects - including listed buildings
  • Committed to exceeding best practice
  • Using a simple fabric first methodology

We specialise in:

  • Project management and low energy building consultancy
  • We can assist with design e.g. assembling / working with an existing design team
  • Our portfolio is varied (see the 'projects' section of this website for selected examples) 

Our experience:

  • Spans highly contemporary new build
  • Quirky listed buildings
  • Traditional local vernacular e.g. brick with cavity wall insulation
We infuse all of our projects with low energy and Passivhaus principles

that go way beyond mere compliance.

Our offering is simple and highly flexible.               


Our expert design team will work with you to provide the best solution for your low energy building or Passivhaus building project. We are dedicated to solving your unique problems and exceeding your expectations. We know that no two clients or projects are the same, and a flexible approach is the only way to ensure a project achieves its potential.

Our flexible approach means that we can either:

  • Offer full in-house architectural services / Passivhaus design
  • Introduce you to our extensive network of preferred partners – architects and designers
  • Work with your existing / client-specified design team

Whether you are starting from a blank sheet of paper or have an outline design in mind, our team can help you take your project forward.


We use our expertise to undertake consultancy of all shapes and sizes for a wide variety of clients. The challenge of ‘how to achieve low energy outcomes cost-effectively’ drives most commissions, and it is here that our experience is invaluable.

We specialise in running cost analysis and energy modeling in tandem to fully interrogate the cost benefit of energy efficiency measures, offering an incredibly useful design and decision-making tool.

Our sustainable building consultancy service includes:

  • Passivhaus Planning Package
  • Industry standard costing tools
  • Dynamic thermal modeling (TAS and IES)
  • Advanced moisture transfer analysis (WUFI)
  • In-situ analysis of existing building performance
  • and much more…

For any requirements not offered in-house, we have trusted associates (including many recognised industry experts), who can provide exactly what you are looking for.


Trunk delivers both new build and refurbishment projects for clients who have either appointed a main contractor or who prefer to work with sub-contractors.

Each route has associated pros and cons and Trunk is perfectly placed to evaluate the optimum route based on an individual assessment of every client’s requirements.

Trunk becomes the client’s ‘right hand man’ to ensure the project’s smooth execution and to deliver complete peace of mind.

Trunk has many happy clients willing to act as referees – details available on request.



Mike is a Chartered Construction Manager and Certified Passivhaus Tradesperson. He has an intense, hands on involvement in every Trunk project, providing an unparalleled level of commitment, expertise and passion to each client.

In 2013 Mike became a finalist in 3 categories at the Constructing Excellence Awards and went on to win Achiever of the Year.  In the same year he was voted one of Building Magazine’s 50 Rising Stars of Sustainability.

Mike’s primary focus at Trunk has been to steadily build a diverse portfolio of work that the Trunk team and clients alike can be very proud of.


Andrew has worked for an exceptionally wide range of clients throughout his career - from the private and public sectors, spanning all types of buildings. Projects have included individual houses, listed properties, housing estates, factories, schools, offices and military establishments.   

Andrew is highly skilled at using his years of experience to help clients control their budgets and fully analyse the cost benefits of their projects.  

As a core member of the Trunk team he brings cost clarity to difficult decisions about energy performance.


Geoff is a Chartered Construction Manager and Chartered Environmentalist and a well respected industry professional. 

He brings top level experience, from housebuilding to major infrastructure projects.  He most recently held the roles of Head of Construction and Deputy Project Director for Network Rail’s £600m Birmingham Gateway Project. 

Geoff also lectures regularly on BSc and MSc programmes in Construction Management, Quantity Surveying and Architecture at Wolverhampton University.

Geoff takes the lead on project planning and procurement and is an invaluable member of the Trunk team. 


If you are interested in working as a Trunk Intern please contact us with your CV.

Please email it to: info@trunklowenergybuilding.co.uk

Please note: 
Our internships are paid posts.
We pay an hourly rate - the London 'Living Wage', plus work related expenses.


We have a trusted network of industry-recognised experts in a variety of key areas, and can make individual recommendations or bring someone to the table to fill a gap as required. Alternatively we can assemble and co-ordinate a full multi-disciplinary team to cover the following and more:

  • Approved Inspectors
  • Architects
  • Cutting Edge Products, Components and Building Systems (including all Modern Methods of Construction)
  • Engineers – structural, building services, drainage and more
  • Interior Designers
  • Landscape Architects / Designers
  • Lighting designers
  • Planning Consultants
  • Specialist Consultants for Building Forensics and Performance Evaluation
  • Surveyors – building, topographical, geo-technical and more
  • Warranty Providers – Trunk can offer preferential rates through being an Approved Partner of Checkmate

Please feel free to get in touch and let us know if you need us to source anything that’s not on the above list.



Push Pull Blog - UF
Mar 2015

Download pdf

Urban Front - NL
Sep 2014

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Trunk - Green Build
Jul 2014

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AJ - Diggs Field
Jan 2014

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50 Stars BMag
Jan 2013

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M Jacob - B Mag
Aug 2012
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Free Schools - B Mag
Mar 2012

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PassivH. - En.World
Mar 2012
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Int Wall Ins - Refurb
Feb 2012
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Trades - Prof Builder
Mar 2011

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Please get in touch

If you have a query in relation to a Low Energy or Passivhaus Project, or you require Consultancy or Design help we would love to talk to you.

Trunk Low Energy Building Ltd
27 Priory Avenue

Registered in England No. 8762434 at HJP Chartered, Audley House,
Northbridge Road Berkhamsted England HP4 1EH. VAT Reg No. 170 5172 28