Who We Are

CSR Sustain was established in 2008 to provide energy assessment services to property professionals throughout the UK in providing compliance energy assessments and audits mandated under the Energy Performance in Buildings Directive (EPBD), and Minimum Energy Efficiency Standards (MEES).

The Team

The team is led by Managing Director Gary Cleary, supported by Technical Director Craig Kefford and Operations Manager Michelle Booth. We have been providing compliance documentation such as EPCs and DECs and Air Conditioning Inspections (TM44) since 2008. We are known as a no nonsense, reliable provider with the experience of dealing with all manner of building and energy compliance related issues. We have developed to provide bespoke energy audits, consultancy roles including CRC Energy Efficiency Scheme and now provide support as ESOS Lead Assessors and MEES consulting.

What We Do

Operating nationally, we have developed a national team of associates who supports us with volume assignments and offer a high level of consultancy services to meet the ever increasing demand for C02 reduction targets, fuel cost savings, design stage assessments and funding applications for renewable technologies. We welcome enquiries for all energy related audits and consultancy services and actively seek to work in a partnering arrangement with all our clients.

We pride ourselves on providing “flexible solutions to complex problems”.

What We Do

Stay one step in front with CSR 1-2-3

Our services include:
  • Residential & Commercial Energy Performance Certificates for construction, sales or lettings (EPC)
  • MEES Studies, advice on improving buildings efficiency and EPC ratings
  • Energy Savings Opportunity Scheme (ESOS Assessors and assessments)
  • Display Energy Certificates for Public Buildings (DEC)
  • Energy Audits of Existing Buildings
  • C02 Emission Targeting & Forecasting
  • Low & Zero Carbon Technology Studies
  • Part L compliance, SBEM & SAP Calculations
  • Strategic portfolio energy efficiency advice
  • Design & Management of Estate wide Energy Efficiency Controls

Why You Need Us?

Utilising our unique CSR 1-2-3 process we are able to tackle the myriad of complex regulation and legislation that impact on commercial energy and building performance.

Who We Work For

We work for individuals, developers, property portfolio owners, facilities managers, M & E consultancies through to institutional investors in providing flexible solutions to comply with the appropriate legislation.

Who We Help

We provide help and advice in interpreting all of the current and forthcoming energy performance in buildings regulatory legislation and identify relevant issues affecting given scenarios and advise property professionals accordingly. We can deal with all levels of enquiry starting with simply benchmarking a property’s energy efficiency and providing certification leading on to detailed analysis of the energy use by monitoring and targeting current fuel usage not only on a buildings performance but in processes and transportation in turn leading to recommendations in reducing both CO2 emissions and cost savings. Individuals and organisations have to make sure that they meet and stay up-to-date with these regulations and changing legislation.

Here at CSR Sustain, We are experts at tackling complexity and providing flexible solutions for our clients.


Energy Performance

Certificates Commercial property sellers and landlords are required by law to provide Energy Performance Certificates (EPC) for all buildings or parts of buildings when they are sold or rented.
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Display Energy Certificates

A Display Energy Certificate (DEC) is currently required annually for all public buildings over 1000m.
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Air Conditioning Certificates

Air conditioning systems can account for 50% of the energy used in a building, and are therefore specifically targeted in the new legislation.
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The Simplified Building Energy Model (SBEM) is the default method for assessing both target and proposed levels of CO2 emissions for non-residential buildings.
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SAP Calculations

Calculating the SAP rating on a scale from 1 to 100 based on the annual energy costs for space and water heating.
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The Energy Savings Opportunity Scheme (ESOS) is now a mandatory requirement in the UK if you employ more than 250 employees, or have a turnover more than £50m you will need to undertake an ESOS Assessment.
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Monitoring & Targeting

Our specialist monitoring and targeting software allows you to take control of your energy use.
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Minimum Energy Efficiency Standards Summarised
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Meet the Team Experienced & growing

Gary Cleary
Managing Director

Specialism - Construction

Gary Cleary

Craig Kefford
Technical Director

Specialism - Engineering


Michelle Booth
Operations Director

Specialism - Property & Agency

Michelle Booth


Case StudyEnergy Surveys for Transport for London

Energy Surveys for Transport for London CSR Sustain were contracted by Honeywell to carry out a comprehensive programme of energy surveys and issue compliance certificates for the Transport for London property portfolio.


Information SheetAre you compliant with the latest energy regulations?

A DEC records the energy efficiency of a public building based on metered energy consumption as used annually over periods of up to the last three years.

Us Today