Certification & Accreditation

In order to deliver high standards of product quality and a great customer experience, we believe it is important to invest in people and process at every level of our business.

The certifications and accreditations below are a reflection of our commitment to continuous improvement, whilst developing our business in line with best practises.

Investors in People

At C3S we aim to achieve the very highest standards of performance throughout our business, which we achieve through our dedicated and experienced team.

Investors in People is a management framework for high performance through people.

This prestigious accreditation is achieved through rigorous and objective assessment to determine performance, which is why it is recognised across the world as a mark of excellence.

We optimise performance by championing best practice in people management and equipping our individuals with the tools to succeed.

ISO 9001 Quality Management

C3S has remained a market leader, not only by continuously improving and developing our people and products, but by continuously focusing on being the best we can be, at all that we do.

As the world’s most recognised quality management standard, achieving ISO 9001 accreditation supports our approach to providing a professional and premium client experience throughout our business.


Safecontractor is a leading health and safety assessment scheme, providing accreditation following comprehensive health and safety audits.

The certification further demonstrates our commitment to ensuring we follow best practises in Health & Safety, keeping our people and the environments they work in as safe and effective as possible.


We take every opportunity to ensure our clients can purchase with confidence.

Constructionline assesses suppliers’ information to a common, transparent standard, so that buyers can source and review relevant supplier information quickly and efficiently.

Removing the PQQ burden for its members and reducing costs within the procurement process, Constructionline is an additional certification supporting our strength and commitment to quality.


C3S is registered with the ‘Railway Industry Supplier Qualification Scheme’ (RISQS) as a further step to providing our clients with a straightforward procurement process.

The Scheme has been developed within the UK rail industry’s Link-up scheme to provide a fair, open and transparent third party qualification process, with the aim of becoming the preferred route for suppliers to engage with their customers, in an efficient and effective manner.

Local Authority Building Control

Our Home Living Units are fully compliant with current building regulations and are certified under the Local Authority Building Control (LABC) approval scheme – a not-for-profit membership organisation that represents all local authority building control teams in England and Wales.

Members must ensure that all buildings are habitable, safe, dry and warm as a minimum. So as well as helping fast-track Building Control sign-off when we deliver our modules; customers can rest assured that they are receiving a high quality, habitable solution.

Altius Vendor

Through a robust and consistent assessment process, C3S has achieved the Altius vendor award.

The Altius assessment process establishes that C3S meets the requirements of Altius clients. This gives clients peace of mind by reducing the risks associated with selecting a new supplier, saves time and money, and improves the quality of supply-chains.

Schueco Approved Blast/Bullet Resistance Expert (SABRE)

SABRE (Schueco Approved Blast/Bullet Resistance Expert) is designed to ensure that customers will feel completely confident when specifying products from the ‘Enhanced Systems’ range.

SABRE approval from Schueco enables C3S to offer a comprehensive range of enhanced-security aluminium systems to mitigate against ballistic and explosive attack.

Schueco Approved Fire Specialist

We work alongside our suppliers to ensure we achieve the maximum outcomes from using their products.

The Schueco Approved Fire Specialist (S.A.F.E) certification is awarded to fabricators who have completed the comprehensive Fire Training course and have shown a competence in the Design, Fabrication and Installation of Schueco products.


This register contains the details of companies who are certificated installers of fire protection in accordance with the requirements of the FIRAS Schemes.

Each FIRAS Certificated company is required to continue to demonstrate compliance with industry standards, material/product manufacturer installation instructions in order to assure clients that the fire protection installed by them is correct to specification and will afford the required fire protection.