Accreditations & Registrations
We are proud to be fully accredited, insured, and registered to deliver compliant and high-quality construction and consultancy services. Our credentials reflect our commitment to industry standards, client assurance, and operational integrity.
Below is a summary of our key memberships, certifications, insurances, and statutory registrations.
Last updated 18 May 2026. Information accurate at the publication date; for latest details, contact us.
Legal Entity
Construction Square Ltd (formerly Cold Square Ltd) is a private limited company registered in England and Wales (Company No. 12352434), with its registered office at 25 Cabot Square, London, E14 4QZ.
We may operate under our registered trademarks of Construction Square®, Cleaning Square® and Cold Square®.
SafeContractor
Certified under the SSIP scheme for health and safety excellence, including accreditation as a Principal Contractor across multiple work categories.
Constructionline Gold
Accredited at Gold, Silver, and Bronze levels under the industry-recognised Common Assessment Standard (CAS), covering H&S, environmental, and supply chain compliance for public and private sector procurement.
Acclaim
Recognised under the SSIP mutual recognition system with Deem to Satisfy (DTS) status, confirming our compliance with Principal Contractor-level health & safety standards.
Cyber Essentials
Construction Square Ltd is certified to the Cyber Essentials standard. This certification confirms that our core systems, devices, and controls meet the required baseline criteria for cybersecurity under the UK Cyber Essentials scheme.
Living Wage Employer
Accredited by the Living Wage Foundation for our commitment to fair pay across all directly employed and contracted personnel.
Social Value Certificate of Completion
Certified by Constructionline for meeting Social Value criteria in procurement, workforce inclusion, and community engagement.
External H&S and HR Compliance Advisory
Through a retained consultancy arrangement with Alcumus SafeWorkforce, we receive expert guidance on health & safety and HR compliance ensuring alignment with CDM 2015, HSE regulations, and responsible workforce practices..
Waste Carrier Licence
Licensed by the Environment Agency under the Waste (England and Wales) Regulations 2011, authorising the lawful transport and handling of construction waste.
Prompt Payment Code
Committed to fair supply chain practices and timely payments to subcontractors and suppliers under the UK Prompt Payment Code.
VAT & CIS Registered
Fully registered under the UK VAT regime and the Construction Industry Scheme (CIS), ensuring tax compliance and transparent operations across all projects.
Comprehensive Business Insurance
Covered by £10M Public Liability, £10M Employers’ Liability, £10M Product Liability, and £100K Contract Works insurance, helping protect our clients, staff, and active worksites. We actively review our insurance requirements and work with specialist construction insurance advisers to ensure cover remains aligned with our projects, contractual obligations, and operational needs.
Information accurate at the time of publishing. We are prepared to adjust or extend coverage to meet specific client or project requirements.
Team Qualifications
Our team’s qualifications include, but are not limited to, SMSTS certification and CSCS-certified managers, one director holding a Silver (Academically Qualified Person) card through a Civil Engineering degree, and another holding a Black (Manager) card via an NVQ Level 7 in Construction Senior Management.
ICO Registration
We are registered with the UK Information Commissioner’s Office (ICO) and manage all personal and project-related data in accordance with the UK GDPR and Data Protection Act 2018.
Constructionline Buyer Profile
We actively manage our supply chain through a Constructionline Buyer Profile supporting structured subcontractor vetting, PQQ workflows, and prequalified procurement in line with public and private sector standards.