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Build Confidence for your Construction Projects

BuildingConfidence is the UK’s highest level of construction accreditation connecting the most discerning buyers with rigorously prequalified sub-contractors and suppliers to provide unrivalled supply chain transparency and reporting confidence.

Trusted by the world’s largest construction organisations

Buyer members of BuildingConfidence include some of the UK’s leading construction and infrastructure brands.

BuildingConfidence for Suppliers

Show your commitment to a higher level of safety and risk management with a BuildingConfidence accreditation and prequalify to bid for some the UK’s biggest and important projects across construction, rail, energy and more.

Higher standards

Achilles gold standard supplier audit is the most effective way to prove your commitment to safety, quality and sustainability.

Continuous improvement

Achilles works with supply-side businesses to help you strengthen your credentials and build long-lasting competitive advantage.

Grow your business

Pre-qualify for major projects with some of the UK’s biggest organisations investing in construction, transport, energy and more and fast track business growth.

Join today

Supplier Membership

One Size Doesn’t Fit All

Our 3 levels of membership can be enhanced to suit your needs. You can also go further by adding extras like carbon reduction, ethical employment audits and audit non conformance reviews.

Achilles Silver+ Supplier






Suitable where CAS is not required. Demonstrate compliance and improve visibility with a single pre-qualification questionnaire and SSIP Deemed to Satisfy.

From £315

Gold CAS Desktop Supplier






Provides all Silver+ benefits plus a CAS accreditation and desktop audit to give your customers additional reassurance.


Gold CAS Site Supplier






Provides all Silver+ benefits plus CAS accreditation and full on-site audit for the highest levels of assurance.

From £2420

Switching to BuildingConfidence is easy!

We make the process of switching to BuildingConfidence smooth and straight forward. Once you’ve signed up and passed us your relevant documentation we’ll handle migrating all your data to the Achilles System. 

To get started simply click here.

We work with you to minimise the effort and of course you get the benefit of Achilles superior accreditation.

We will make sure to keep you informed every step of the way.

Our amazing customer service team will keep you updated along the way

Switch now

BuildingConfidence for Buyers

Protect your business from contractor risk with Achilles supply chain due diligence and the BuildingConfidence network of rigorously audited, prequalified suppliers and sub-contractors.


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Simplify reporting

Access your supplier and supply chain data, demonstrate compliance and improvement and make annual reporting easier.

Learn more

Find suppliers faster

Match with 1000s of suppliers using personalised compliance and qualification criteria using our prequalified supplier network.

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Reduce risk

Achilles goes further – assessing suppliers across a wider range of criteria including health and safety, cyber, financial, GHG emissions and ESG.

Let’s talk

Dale Turner, Director of Procurement and Supply Chain, Skanska UK

“In terms of value, Achilles BuildingConfidence gives Skanska visibility and transparency of our supply chain and highlights where the major risks lie.”

Need more reasons to join BuildingConfidence?

Industry Excellence

Achieve construction excellence by simplifying the process of gaining CAS accreditation. Our industry leading system and customer support will help you to meet your compliance requirements, benchmark against your peers and have a platform for improvement.

Personalised Parameters

Set your own parameters through custom scoring, personalised compliance and qualification criteria. Compare your ratings with other anonymous buyers.

400+ delegates

API Integration

Integrate supply chain information into your own in-house systems to support more efficient and lower risk procurement.

Help and support

BuildingConfidence Support

Click on the links to download useful help documents, or visit the help site here for more help and support.

Enquire about becoming a BuildingConfidence buyer