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We're proud to have achieved a number of awards and accreditations in recognition of our industry-leading capabilities. We also hold memberships and partnerships with several industry bodies which demonstrate our commitment to sustainability, health & safety and social value. 

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Best Companies Outstanding Organisation (2 star accreditation)

Building Confidence (Achilles)

This now includes certification to the new Common Assessment Standard (CAS) which has been introduced by BuildUK to standardise the prequalification bet365 online sports bettingsystems for our clients.

Cyber Essentials (Certified Plus)

Disability Confident

EcoVadis - 2023 Gold status Sustainability rating

ISG has been awarded gold status accreditation by EcoVadis, putting us in the top 5% of our industry when it comes to our environmental, social and ethical impact.

ISO 14001:2015 Environmental Management System

ISO 19650::2018 BIM

ISO 9001:2015 Quality

ISO ISO 45001:2018 - Health & Safety

Planet Mark

Year 3 certified business - This is to certify that ISG has achieved the Planet Mark by reporting a reduction in its carbon footprint using the emissions banking approach and engaging its stakeholders. 

The 5% Club 2023-24 Employer Audit Scheme - Gold accredited membership

Three ISG employees on a construction site


Armed Forces Covenant - Employer Recognition Scheme - Gold Award 2023

Best Companies - Top 25 bet365 online gamesBest Big Companies to work for 2022

BPIC - Black Professional in Construction 2021 (Best Inclusion and Innovation and Best Industry Contractor)

British Safety Council - International Safety Awards 2022 (Distinction Winners)

Building awards 2022 - "Delivering Social Value" Award

SEMH Manchester school programme

Building Awards 2022 - Major Contractor of the Year (turnover over £500m)

The City of London’s Considerate Contractor Scheme (CCS) Awards - 3 Gold awards

160 QVS (UK fit out)
Northcliffe House (UK fit out)
Millennium Bridge House project (UK construction)

Education Estates Awards 2020 - (Contractor of the Year)

The Job Crowd Top Company for Apprentices to work for 2022/23 Construction and Civil Engineering - Winner

The Job crowd Top Company for Graduates to work for 2022/23

NWRCA (North West Regional Construction Awards) 2022 - Net Zero Award

WINNER: Chester Community Fire Station – Cheshire Fire Authority (ISG)

Planet Mark awards 2022 (Sustainability Stakeholder Engagement award) 

ISG graduate employees in a meeting room

Memberships and partnerships

British Safety Council

BSRIA (Building Services Research & Information Association)

CHAS (Elite)

CIBSE (Chartered Institution of Building Services Engineers)

Considerate Constructors Scheme - founder member

Construction Innovation Hub

London Business Climate Leaders Group

The National Social Value Taskforce


Social Enterprise UK

UKGBC Advancing Net Zero Programme

UKSPA - Affiliate Membership

UKGBC Circular Economy programme founding sponsors

UKGBC - Commercial Retrofit Task Group

UKGBC Resilience & Nature-Based Solutions Programme

UKGBC Whole Life Carbon reduction via Circular Economy principles task group

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