Real estate, facilities management and construction


ISG is a global construction specialist delivering work in fit out, technology and construction. ISG promotes the sustainability agenda through its own business operations and supporting its clients to achieve their sustainable business goals.
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3 years

Construction cranes with sunset



Location-based total carbon footprint

Reporting Boundary: Offices, sites and accommodation related to UK and International ISG sites over which ISG have financial control.

Emission Sources: Electricity, T&D Losses, Gaseous fuels, Other Fuels, Refrigerants, Waste, Travel, Commuting

Reporting Period: 01 Jan 2021 – 31 Dec 2021

12,497.8 tC0₂e

Location-based total carbon footprint per employee

4.2 tC0₂e

Market-based total carbon footprint

11,578.7 tC0₂e

Market-based total carbon footprint per employee

3.9 tC0₂e


FTE employees

We engage our employees and wider stakeholders to unlock their talent and knowledge to drive year on year progress in sustainability.



UN Sustainable Development Goals

We recognise that transparent communication is essential for transformational change and we quantifiably contribute to 8 SDG.


Certification story

ISG, a global construction specialist delivering work in fit out, technology and construction, has achieved Planet Mark certification. This is ISG’s third year of business carbon footprint reporting with Planet Mark.

Achieving the Planet Mark is based on the commitment to continuous improvement in sustainability in its business operations by measuring and reducing its carbon footprint and engaging its stakeholders. 

Over the next year, the company will be working towards reducing its carbon emissions and sharing its journey with its community to inspire others. By being more strategic about its environmental responsibility, it will be able to significantly increase its positive impact and hope to encourage continual improvements within its community.

Steve Malkin
Founder and CEO
Planet Mark
“I am delighted by ISG’s third year Planet Mark certification! The company is committed to doing things right, from embracing the challenges of measuring a wide array of its business operations, to the excellent reduction in carbon footprint this year. Moreover, ISG realises it is part of a community – willing to share success and best practice to help us all reduce our impact. This is the hallmark of a truly sustainable company. All I can hope for is the success to continue. Well done all.”

Certification story

ISG is committed to driving revolutionary change in the construction industry, promoting the sustainability agenda through its own business operations, and supporting its clients to achieve their sustainable business goals. As well as the commitment to measure and reduce its carbon footprint, ISG works with a number of organisations to help promote its sustainability, such as the Supply Chain Sustainability School, the Institute of Corporate Responsibility and Sustainability and is a member of the Considerate Constructors scheme.

Constructors have a huge opportunity to benefit from sustainable practices. In a decade of climate action, innovative companies will stand to gain the most as standards, and the demands of customers and building occupiers, continue to evolve. The industry has the ability to impact at least one fifth of the UK’s emissions, and pioneering companies must think environmentally to meet modern demands. This includes working within their own organisations, with their stakeholders and in their supply chains to create whole-life sustainable construction projects. 

Future targets

Reduce carbon emissions by at least 2.5% each year

To recertify next year ISG must reduce emissions by 2.5%.

Aim to reduce carbon emissions by 5% each year

A 5% year-on-year reduction is the target reduction recommended by Planet Mark.

Reach net zero carbon by 2030

ISG has made a public commitment to achieving net zero carbon emissions by 2030.

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