Your trusted partner in energy compliance.

From our offices in London and Manchester, we provide a comprehensive suite of energy auditing and consultancy services to optimise the asset and operational performance in properties across the UK and Europe.

Through trusted insight and guidance, we increase asset value for property owners and landlords, help organisations and portfolio owners achieve their ESG targets, and reduce carbon emissions and energy costs for commercial tenants.

Who we work with

Achieve optimal energy performance with us.

Our circular, three-phase management cycle – Benchmarking, Monitoring & Targeting, Optimisation – takes a holistic approach to energy efficiency.


15 years of energy compliance.

From end-users and key industry stakeholders to third-party property management companies, councils, and housing associations, we’ve worked with clients across every public and private sector, at every level and building type, to deliver exceptional results in asset and operational energy performance.
  • Feb 2006

    The company founded CSR Sustain to address the forthcoming requirements mandated by the government to enforce energy performance reporting on buildings.
  • Apr 2008

    EPCs became mandatory in the UK for commercial properties for sale or to let. Upon completion of NDEA qualifications, we delivered our expertise and services.
  • Oct 2008

    DECs became mandatory in the England and Wales for public buildings. Since then, we have benchmarked the operational performance of all areas of public sector property, and advised on how to improve operational efficiencies.
  • Jan 2009

    TM44's became mandatory in the UK for air conditioning systems with a rated output of over 250kW.
  • Apr 2010

    In advance of the Carbon Reduction Commitment going live, we carried out a project in partnership with 33 London borough councils, of which we consulted with 18.
  • Jan 2011

    Assessments were conducted across TfL’s offices and regional centres across central London, over 100,000m2, required as part of a larger energy performance contract managed by Honeywell Controls under the Clinton Climate Initiative.
  • Apr 2012

    Feed in Tariff (FIT) is launched for solar PV. To support small-scale renewable electricity generation up to 10MW, we carried out EPCs and Green Deal assessments to support Ofgem applications for the grants.
  • Apr 2013

    We conducted and delivered hundreds of Greendeal assessments, which enabled successful applicants to claim grants for renewable technologies.
  • Mar 2015

    Minimum Energy Efficiency Standards (MEES) regulations were initially introduced. We supported our clients undertake strategic CAPEX funding to comply with the impending targets.
  • Apr 2018

    Off the back of phased MEES regulations for residential and commercial properties, we undertook a MEES consultancy service to advise clients on how to achieve higher EPC ratings.

Read the latest energy insights.

Let’s talk energy:
speak to our experts

With CSR Sustain, you’re always speaking directly to an experienced, close-knit team of experts who work hard to understand your business inside-out. Call today or send a message and we will be in touch within 24hrs.

Manchester: 0161 762 5670
London: 0203 817 8222