CORE Sustainability


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20th March 2019 - RICS Commercial Landlord and Tenant Essential Update, Bristol

An afternoon dedicated to the topic of Minimum Energy Efficiency Standards (MEES) with guest speaker Daniel Montlake MRICS.

MEES case studies and advice

  • MEES Case Studies – looking at the impact of MEES on buildings including Office, Retail, Industrial, Leisure

  • Remedial Work – Benefits and Issues for Landlord & Tenant

Twitter: #RICScommercial

22nd November 2018 - RICS Residential Landlord and Tenant Essential Update, London

Join Core Sustainability’s Daniel Montlake MRICS as guest speaker on the Minimum Energy Efficiency Standards.

May/June 2018 - RICS Property Journal - article The stick that became a carrot

With the Minimum Energy Efficiency Standard (MEES) newly in effect, Daniel Montlake and Sivan Gelb examine their potential impact on the market.

March 2018 - RICS Insight Report  - Minimum Energy Efficiency Standards (MEES) Impact on UK property management and valuation

Core Sustainability's Director Daniel Montlake is co-author on an insight paper for valuers, asset managers and their clients. Writing about MEES and the risks that it presents.

September 2017 - RICS Event "Minimum Energy Efficiency Standards Roadshow 2017"

- Be ready for the EPC 2018 deadline for commercial property.

Join one of the half-day seminars at a location most convenient for you at one of the following venues and dates;

  • London - 03 October

  • Bristol - 17 October

  • Leeds - 31 October

  • Birmingham - 07 November

  • Manchester - 23 November

Click on link for further information and booking

May 2017 - Property Week article "Are landlords unprepared for EPCs?" - Read feedback on our original article from April 2017

Interesting response to our research including the opinion that a lot of work still needs to be undertaken with the introduction of MEES. We agree with Vicky Cotton who states the importance of obtaining new and, most importantly, consistent EPCs across a portfolio. Plus having all the data with one consultant to help reduce risk.

April 2017 - Property Week article "Landlords still unaware of new EPC requirements" - Read our data research on MEES regulations

February 2017 - 5 minute short survey about preparation for MEES

With our overarching interest in property energy efficiency and only a few months to go before these regulations come into force, we’re keen to gauge how prepared the sector is. To do this, I would like to ask for your opinion by completing this short survey. Simply click on the following link. You may also forward this survey (if relevant) to any of your colleagues.  

Article - 27 January 2017 - Daniel Montlake MRICS explains - Reasons to have accurate and quality Energy Performance Certificates (EPCs):   MEES is monetising energy efficiency!


EPCs have been a legal requirement for landlords since 2008

Post Brexit, Trump years & Paris Climate Agreement

Minimum Energy Efficiency Standards (MEES) regulation from 2018 – EPC ratings now matter!

New Green Finance on energy efficiency measures

Basic facts about EPCs

An Energy Performance Certificate (EPC) gives a property an energy efficiency rating from A (most efficient) to G (least efficient). EPCs are needed whenever a property is built, sold or rented. They have a 10-year limit, however building conversions and changes in size to a building may require a new EPC. An accredited EPC assessor needs to be instructed and produce the certificate. Different rules apply to England, Wales and Northern Ireland compared to Scotland. The Landmark Group hold online EPC data. In this article, we will NOT be looking at Scotland.

EPCs Today

Up until recently, the idea that EPCs would give prospective tenants an indication of how energy efficient a property is had been given little regard. In my opinion, many tenants don’t even know EPC’s exist, let alone show any interest in the document or the level of the rating.

EPCs Tomorrow…

Thinking ahead in Post Brexit and Trump times, I believe energy efficiency will continue to play an important part in UK policy. In 2015, the conservative government passed numerous environmental regulations which go together with the international agreements made at the Paris Climate Agreement towards a low or net zero carbon world.

From April 2018, the new Minimum Energy Efficiency Standards (MEES) Regulations 26 March 2015 dictate that, it will be unlawful for commercial and residential landlords of properties with an EPC rating of less than “E” to grant new leases or renew tenant leases (except for some exemptions). Landlords will need to carry out works to improve the energy performance of their buildings or could face civil penalties.

The Government has reported that almost one in five commercial properties in England and Wales is in danger of not complying with the legislation.

Low rating EPCs and valuation

A recent study of the regulations has forecasted as much as a 10% reduction in the capital value of non-compliant commercial property. That means approximately £16.5bn could be wiped off the value of UK commercial property portfolios due to upcoming energy legislation. Landlords and REITs are taking the MEES regulations seriously and thus seeking expert guidance to assess the risk and make a case for energy efficiency improvements on their commercial property portfolios. In view of this, the importance of ensuring quality and accurate EPCs to achieve the highest rating possible is relevant if the landlord wants to avoid serious and expensive consequences. This has never been the case before!

EVENT: A Seminar on New Energy Regulations for Landlords and Property Developers:

Wednesday 28 September 2016 from 6.30pm at The Building Centre, 26 Store Street, London WC1E 7BT

MCG Solicitors and Core Sustainability hosted a free seminar on the new Minimum Energy Efficiency Standards (MEES) during World Green Building Week (26 September – 2 October 2016).  

Sivan Gelb, Partner at MCG & Daniel Montlake, Energy Consultant at Core Sustainability, outline the new Energy Efficiency Regulations coming in on 1st April 2018 which will affect commercial or residential units with an Energy Performance Certificate (EPC) rating of F and G.   The financial penalties for non-compliance are severe:  Where the property is sub-standard because its energy performance falls below that minimum level of energy efficiency* a landlord may not:

a)      grant a new tenancy or extend or renew an existing tenancy of a property (both domestic and non-domestic) on or after 1 April 2018;

b)      continue to let a domestic property on or after 1 April 2020; or

c)       continue to let a non-domestic property on or after 1 April 2023.

This seminar gave practical tips to all landlords and property developers on how to comply with the new MEES regulations including:

 Cost-effective changes, deadlines, how to avoid incurring penalties, legal implications of MEES and future compliance.

*with very few exception


On Tuesday 1st March 2016, Dan Montlake MRICS, the London-based specialist property energy consultant, launches CORE Sustainability.

The bespoke firm of Chartered Surveyors and property energy consultants, provide cost-effective, innovative solutions for commercial and residential buildings to:  Increase energy efficiency, reduce energy bill and improve the carbon footprint.

With a wealth of experience and knowledge, CORE Sustainability offers high quality, sustainable solutions. Daniel Montlake has worked with clients ranging from drinks manufacturer Innocent and commercial property agents Savoy Stewart, to accountants HW Fisher and Company and international audio-visual company Electrosonic.

Daniel Montlake MRICS, Founder and Director, CORE Sustainability, says:

“The launch of CORE Sustainability reflects the growing number of ways we can reach the core of your building requirements to improve energy efficiency in a cost-effective way.

“With the ambitious global climate deal at the forefront of the UK property market agenda, it makes this is a crucial time to assess those needs and take action.”

For further information on the EPC Improvement Audits and Minimum Energy Efficiency Standards (MEES) please go to

Notes to Editors

Please contact Jodi Rogers on 020 7183 4885 or for further information.

About Daniel Montlake MRICS

Daniel started his property career in 1999 after graduating in Estates Management.  He qualified as a Chartered Surveyor at West End practice Savoy Stewart and became a partner specialising in commercial property investments.  In 2009 Daniel set up VAI Energy with a focus on delivering commercial and residential Energy Performances Certificates (EPCs) and Land Registry Plans.  Daniel joined forces with Robert Phillips in 2013 to form RD Sustainability which offered a broad range of energy services.  Following on from that he has launched CORE Sustainability.

CORE Sustainability offers the following services: EPC Improvement Audits/ MEES, Commercial and Residential EPCs, Energy Audit and Solutions, Behaviour change guidance, ESOS, ISO50001, DECs, SAPs, and Land Registry and measured Plans.

 Winter Newsletter 2015

Welcome to our first newsletter!

Firstly, we would like to thank all of our clients for your business and support over the course of this year.  We have re-branded to be called CORE Sustainability. We are expanding the business in new directions, increasing our product offering to meet your needs and keep pace with the developments in the property energy market. As we do this, we always aim to offer you the highest level of personal service. 

What we’ve been up to….

2015 has been a very busy year. One main focus for us has been ESOS – the Energy Savings Opportunity Scheme. ESOS is a compulsory energy assessment for larger companies fulfilling specified criteria. The three aims of ESOS are to reduce energy consumption, lower carbon emissions and save money. Click ESOS for more details. After many months committed to this project, we are very proud to have successfully completed our ESOS assessments and helped our clients to identify cost-effective ways to reduce their energy consumption. We have provided ESOS assessments for a number of high-profile clients, ranging from hedge funds, banks and professional service providers to food manufacturers and electronics companies. 

What’s new?

We are very pleased to announce that we have recently added ISO 50001 Energy Management certification to our portfolio of services. The ISO 50001 Energy Management system provides a framework to help organisations use energy more efficiently and responsibly and manage their carbon footprint. For more information on ISO 50001 and its benefits, click ISO 50001. If you were required to have an ESOS audit this year, the good news is that with ISO 50001 certification you will automatically be considered by the Environment Agency as ESOS compliant at the next audit. The next round of ESOS audits will take place in 2019. Now is an ideal time to consider a plan of action to implement ISO 50001 for your company. We would be very happy to discuss this with you in the New Year so please do get in touch. 

Another new service we are excited to offer is SAP – Standard Assessment Procedure. SAP is the government-approved system that provides an energy rating for new homes and conversions. Click SAP. SAP examines the construction, heating system, internal lighting and any renewable technology used in the build to calculate the energy cost of the property. SAPs are required for all new-build properties plus certain types of conversions and extensions. New homes need to pass SAP before Building Regulations will issue their approvals and allow the property to be put up for sale. As SAP assessors, we do much more than simply carry out the assessments. We can guide you in planning the energy profile of your new build to help you use energy more efficiently and reduce your carbon footprint.

Planning ahead

Looking ahead to 2016, we plan to focus a proportion of our resources on preparing clients for the new Minimum Energy Efficiency Standards (MEES) announced this year which come into force in 2018. These new laws will affect landlords with properties holding an EPC rating of F or G, preventing them from granting new tenant leases or renewing existing leases. Properties in this band will need to undergo necessary improvement works to increase their energy rating or incur penalties. With many years of expertise in EPCs, we are in a position to help our clients ensure all EPCs are up to date and accurate and help them identify any work which may need to be done to meet the required MEES standards. We advise allowing plenty of time to plan any remedial works to make the process run as smoothly as possible. For full details on the MEES legislation, click MEES. 
We wish you a great Christmas and a happy New Year.

Daniel Montlake (MRICS)

020 7183 4885 Office