Who we are

At CSR Sustain, we have over 15 years’ experience in supporting clients at every level of their building optimisation and performance, and providing meticulous audits, assessments, and solutions across property portfolios large and small across the UK and Europe.

From our Manchester and London offices, we’ve grown to develop a unique perspective in complex commercial property energy legislation which our clients value when delivering their projects.

Today, we’re committed to providing a suite of energy performance solutions that optimise commercial properties – unlocking the true value of energy efficiency for our clients and building a sustainable future for everyone.


projects over the last 15 years


of our work is repeat business

15 years

of optimising commercial
energy performance

We believe in a brighter future



We increase the asset value of a commercial property by optimising its energy performance.



We reduce energy consumption and carbon emissions to lower operational costs and contribute to Net Zero.



We’re not affiliated with utility providers; our solutions are clear, competitive and unbiased.

Experts in energy compliance

Meet our expert team


Gary Cleary
Founder and Managing Director

With four decades of experience in the property industry, Gary specialises in construction and property investments. Over the past 15 years, he has dedicated himself to enhancing property performance and energy efficiency, earning recognition in the compliance industry. His track record includes leading government-mandated compliance initiatives and showcasing exceptional leadership and problem-solving skills.

Luke Cleary
Technical Director

With his background in mechanical design engineering, project management, and building analytics, Luke’s career spans the UK and Australian sectors, offering a unique perspective on climate-specific technology and systems. His achievements include significantly reducing energy demand for large-scale commercial properties, earning recognition from the Engineering Council UK and an IEng affiliation with CIBSE.

Who we work with

Offering industry insight

CSR Sustain provides valuable technical insights to drive energy efficiency, sustainability, and operational excellence in various industries. Read more about the latest insights today.

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