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Display Energy Certificate (DEC)3450_dec - - becky

All properties or parts of properties occupied by public sector organisations, including State Schools, FE and HE Institutions and the NHS, that are 250m2 or larger and to which there is any degree of public access, need to have a valid DEC on display and lodged on the central public access database. Our accredited assessors provide a knowledgeable and responsive service covering all types of property.

Put us to the test NOW!  For a no obligation competitive DEC quote please email the building post code and whether you need a new DEC or an annual renewal to john@greenconsultancy.com or to discuss your requirements please call John Treble on 01761 419081.

About DECs

DECs are a consequence of the Energy Performance of Buildings Directive (EPBD) which was enacted in the UK as Part 5 of the Housing Act 2004.

They show an operational energy efficiency rating on an A to G scale based on the actual energy consumption over a 12 month period in relation to a benchmark figure for the same class of building. The assessment must to be done by an accredited person. The Certificate and Advisory Report (AR) has to be lodged on a central database and the certificate must be displayed prominently in the building. The advisory report identifies opportunities for improvement.

For buildings, or parts of buildings, with a Gross Internal Floor Area of 1,000m2 or more a new DEC and AR is needed every seventh year; the DEC must be renewed annually and the AR every seventh year.

For buildings or parts of buildings between 250-999m2 a new DEC and AR is required every 10th year with no need for an annual renewal. A new building needs a DEC from the point of occupation and it is based on its Energy Performance Certificate rating in year one rather than actual energy consumption.

DECs can also be issued for private sector buildings and this is a popular low cost way to demonstrate the efficiency of the building and an organisation’s commitment to the environment. They are also a way of incentivising building users to competitively reduce energy consumption within large multi-site organisations. DECs may become mandatory for private sector buildings with public access.

DECs are also a means of compliance with ESOS.

Penalties for Non-Compliance

Fines are £500 for failing to display a DEC at all times in a prominent place clearly visible to the public and £1,000 for failing to possess or have in your control a valid Advisory Report. In addition to these penalties, it will still be necessary to commission the documents. Enforcement is by Trading Standards.

Our DEC service

We provide a full nationwide DEC service with quick and responsive turnaround. Our prices are competitive and our knowledgeable team can advise on the correct method of assessment to ensure that the certificate issued is accurate and legal. We cover all sizes and types of property from single buildings to multiple buildings at one site or multiple buildings at individual sites.

Our quotes are inclusive of site visits and all costs and guaranteed as firm for twelve months from the quotation date. We also offer three year contract rates. When taking over renewals from another company we provide site visits FOC. If you have any new buildings that need a DEC we can do those as well.

Please see our DEC clients and their typical comments below.

Put us to the test NOW!  For a no obligation competitive DEC quote please email the building post code and whether you need a new DEC or an annual renewal to john@greenconsultancy.com or to discuss your requirements please call John Treble on 01761 419081.


TGC is the proud winner of the 2016 Interserve Supplier of the Year Award for Customer Focus.

Here is our consultant Andrew Burt at the award ceremony.

Award winner


DECs for Arts University Bournemouth

“The Green Consultancy was quick to respond and produce our DECs within a narrow timeframe. The service provided by was efficient and professional. The exact energy usage was determined and the DECs produced in a timely manner.”

Brian Wheatley, Estates Manager

Vision West Notts

DECs for Vision West Nottinghamshire College

“Extremely efficient, friendly and helpful service as always. Very good communication throughout; we will definitely be using The Green Consultancy again and recommend their services to others!”

David Burrows, Building Services Manager

Middlesex University

DECs for Middlesex University

“I’m very happy with the service Green Consultancy provides. Pricing is always very competitive. Staff are always friendly and helpful. Assessors are professional and complete work, on and off site, very quickly. Highly recommended.”

Shawn Woods, Environmental Services Technical Surveyor


DECs for Birkbeck University of London

“Excellent service as always from The Green Consultancy. Good communications and always helpful. Very thorough and helped identify errors in our billing data, ensuring compliance with both the DEC requirements and the CRC.”

Ola Bankole, Environment Manager

West Anglia College

DECs for College of West Anglia

“Your assessor was very professional and also very patient regarding our varied energy data. He answered my questions very promptly and helped me through my first round of DEC obligations. We have worked with The Green Consultancy before and found them very cost-effective. I would happily recommend them.”

Katherine Middleton, Energy & Environment Officer


DECs for University of Worcester

“The University has received a very customer focused and efficient service from The Green Consultancy in providing our DEC requirements and general energy consultancy. TGC consistently produces work of a high quality and have produced our latest DECs in a timely manner and at competitive rates.”

Andy Lewis, Estates Manager

Cath Conion

DECs for Cath Conlon Project Management Ltd

“As a new client, I have been impressed by the technical expertise and the depth of knowledge provided by The Green Consultancy. A pragmatic approach in achieving compliance has been recommended in appropriate circumstances. The administration of the management team has been very efficient. A friendly and professional service at a competitive cost.”

Karen Sherlock Project Management Administrator

NHS Logo

DECs for Wrightington, Wigan and Leigh NHS Trust

“The Green Consultancy has given a high quality of service to the Trust and is always very competitive on price. Their consultants are very knowledgeable in their field and communications between us are always dealt with promptly. The TGC team are professional, very knowledgeable and prompt with their work.”

Mark Hogan, Energy & Environment Manager


DECs for Coventry and Warwickshire Partnership Trust

“The procedures have been followed and implemented fully and your DEC assessor has gone to the extra trouble of keeping me fully briefed of any concerns and has endeavoured to provide solutions along the way. Any concerns expressed by myself have been answered concisely and, as last year, the service delivered has been prompt. Please thank the administrative staff and your assessor for an excellent service again this year.”

Richard Best, Statutory Standards Engineer

Westminster College

DECs for City of Westminster College

“A trouble-free service requiring little input from us. Seamless operation that didn't require us to do much work - I like labour saving! Although we may not like the actual results (our problem), the service provided has produced an accurate outcome. It has been very easy for us and I appreciated a reminder that we had not fully responded in a timely manner. We are totally satisfied with the service provided and will re-book next year.”

Robin Pellett, Head of Facilities and Building Management Services


DECs for East Lancashire Hospitals NHS Trust

“The Green Consultancy has supported the Trust for many years in providing timely DECs. In addition they also provided technical support in sustaining the best compliance levels and reducing our carbon emissions. Our Assessor fully understands the complexity of an ever changing NHS Estates and professionally reviews the services closely with the Trust to ensure that high quality standards are maintained.”

Chris Redmond, Energy and Environment Manager


DECs for University of Greenwich

“Your assessor’s help and expertise when he came to carry out the surveys made the process of getting the DECs easy. He has been very helpful, always replied to my calls or emails and managed to interpret a lot of data that was given to him from all of our site main meters and sub meters. The Green Consultancy provided a very good service at a good price as usual which is why we come back to you each year for our DECs.”

Jon Hudson, Building Services Engineer


DECs for De Montfort University

“Renewing our DECs couldn’t be easier. The Green Consultancy found solutions to any data issues quickly, provided good advice to us about how to improve our buildings performance next year and very efficiently produced and lodged all our DECs. Work completed with minimum hassle to me and good guidance ensuring compliance with latest EPBD. Completely trustworthy, thorough and professional service. A painless and efficient experience at a very competitive cost. There is no reason not to use the Green Consultancy.”

Paul Eccleshare, Energy Manager


DECs for Godalming College

“Having inadvertently let our DECs expire I was keen to have the re-assessment of our six buildings carried out quickly, competently and at reasonable expense. On contacting The Green Consultancy I received a quotation back within 1 day and the offer of a visit by an assessor for the following week. I was given clear guidance of what information was required for the assessment and what would be involved. The assessment took place as planned and I was delighted to receive the certificates within 2 weeks.”

Martin McCarthy, Director of Services

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DECs for NHS

“Great job as always and good communications from The Green Consultancy - I was kept informed throughout the process. Will see you next year when I will need my DECs renewing.

As usual, the Green Consultancy has delivered the product in a timely manner and has provided us with a quality service that is very competitively priced. All in all it was a painless experience, with the assessor being very patient and helpful. Excellent professional service. We are extremely happy with the service we have received from TGC and I recommend their services to others without question.”

Nicholas Cartwright, Capital Information Officer, Salford Royal NHS Foundation Trust

“I have used The Green Consultancy to produce DECs for Sheffield Children's NHS Foundation Trust Sites for a number of years and always receive prompt and efficient service and suitable reminders of deadline dates for information required. We always receive an excellent service from TGC.

Their staff have a broad operational knowledge of the subject, and are very efficient in delivering all work streams tasked to them. Overall over a number of years I have been very pleased with their pro-active service in respect of the creation of all our DECs. I have no hesitation in recommending this service to other organisations.”

Peter Knowles, Head of Estates, Sheffield Children’s NHS Foundation Trust


DECs for Interserve plc

“The Green Consultancy and their assessors worked tirelessly to turnaround 39 Display Energy Certificates, including all site visits, in a very short amount of time. The communication was friendly and efficient, and in some cases assessors worked unsociable hours to enable us to meet our deadlines. We were so impressed with their performance and the value for money on this contract that we have begun to use them for other contracts and clients. We have very much enjoyed working with them and look forward to a long working relationship.

Having DEC assessors nationwide clearly enables TGC to offer excellent value for money and enabled us to arrange for a DEC in Northern Ireland instead of hiring an individual contractor locally. This reduced pressure on our local operational teams at a busy time of year, and TGC was efficient enough to have a rapid turnaround which was much appreciated.

Seamless and hassle-free! Professional, patient, high quality service, and fabulous as always! TGC’s DEC assessors moved quickly and efficiently to get some of our outstanding DECs completed despite a number of client-related issues getting hold of the right information.”

Tannith Cattermole, Sustainability Coordinator

“TGC’s administration and communication regarding DEC orders and co-ordination of assessor’s visits is first class. There is an ease and a timely manner with which the work is carried out. I have found that the expertise of the assessor is exceptional and is coupled with helpful explanations when necessary; overall the service is professional and far better than other consultancies have offered in the past. Well done.”

Mark Evans, Sustainable Development Manager


DECs for Pennine Acute Hospitals NHS Trust

"Your consultant has been extremely helpful over the issuing of the DECs and provided invaluable advice and assistance in ensuring that we compiled the necessary data. He has made the whole process as simple as possible and we will most certainly be using your services in the future. In addition to this I would like to thank Michael Webb, Client Services Manager, who has provided invaluable advice which has saved our organisation a great deal of time and effort and, more importantly in the current economic climate, money.

Before we engaged The Green Consultancy three years ago, we canvassed many companies who promised a quick and easy delivery of the mandatory energy certificates which were required for our many buildings. All promised a quick and easy solution but when we interviewed the short listed companies it appeared that the input required from our side was much too onerous considering our limited resources.

We therefore engaged TGC which promised a much simpler solution whilst meeting all the required criteria and I am certainly glad that we made this decision. The assessor has made this task relatively easy by offering first rate guidance and advice. He has a thorough knowledge of the information required and the best ways to arrive at the end result coupled with some good suggestions on how to improve our ratings. In the time that we have been ing TGC for our DECs I have found without exception that they are a professional and helpful company to deal with.

The assessor has provided us with invaluable advice, corrected our mistakes and made the whole process so much easier and less expensive than it could have been. We will continue to use TGC for the foreseeable future and I don’t hesitate to recommend them.”

Peter O'Neill, Estates Officer