Contractor vs supplier
In very broad terms, 'contractors' are organisations appointed by clients to complete construction works. However, this apparently straight-forward definition is complicated by the fact that contractors tend not to have all the trades or goods required to construct a building themselves. This means that they are likely to appoint a range of subcontractors and suppliers to help build the works for which they have been contracted.
Traditionally, ‘suppliers’ were considered to be organisations contracted to provide physical supplies such as goods, materials, plant, and so on, either directly to the client or to the contractor or subcontractors.
However, this definition has become blurred by the increasing complexity of the construction supply chain and the emergence of practices such as off-site fabrication in which the provision of complex fabricated goods might include activities that would otherwise be classified as construction work, and the increasing outsourcing of operational contracts for the supply of services (rather than goods) to run completed developments.
A more simple distinction therefore might be that a contractor is contracted to complete construction works whilst a supplier is contracted to supply particular goods or services.
However, the distinction has been further complicated by the UK government using the term ‘supplier’ to refer to any ‘…provider of services or goods either directly to the employer or to another supplier in a supply chain’ and suggesting that ‘...a tier 1 supplier can provide services to the project (for example, development of the project brief, architectural services, engineering services, construction management services), or can provide goods to the project (for example, constructed assets)’ (ref. PAS 1192-2).
This catch all definition suggests that the term ‘supplier’ could be used to refer to contractors, subcontractors, consultants, suppliers and service providers.
[edit] Related articles on Designing Buildings
- Contractor.
- Domestic sub-contractor.
- Integrated supply team.
- Main contract.
- Main contractor.
- Named sub-contractor.
- Nominated sub-contractor.
- Nominated supplier.
- Procurement route.
- Service provider.
- Specialist contractors.
- Specialist subcontractor.
- Specialist supplier.
- Sub-consultant.
- Subcontractor.
- Subcontractor vs supplier.
- Supplier.
- Supplier assessment.
- Supplier selection.
- Supply.
- Supply chain.
- Supply chain management.
- Trade contractor.
- Types of contractor.
- Works contractor.
Featured articles and news
We're expanding our collaborative mission by launching DB Intelligence, an exclusive market research advisory panel. Built environment professionals can now get paid to share their expertise on industry trends, products and services.
Panel members receive direct financial incentives for participating in research projects like short surveys, 1-2-1 interviews and focus groups. Register today to shape the future of the construction sector.
Planning condition discharge in England and Wales
A brief exoplanation from a building compliance expert, with further links.
Overheating guidance and tools for building designers
Guidance for dealing with element of building fabric control that have increasing importance.
Shading for housing, a design guide
From the Good Homes Alliance and British Blind and Shutter Association.
UK Standard Skills Classification (SSC)
A shared framework for describing skills needs.
Social media ban consultation comes to close
CIOB urges UK Government to consider social media’s role in careers guidance in ban debate.
The latest of eight Skills England apprenticeship units
The addition of battery manufacturing welcomed by ECA with a warning about the risks of fast-tracked apprenticeship units.
Building Control Independent Panel final report
A precis of a key report led by Dame Hackitt with full recommendations and link to the government response.
Building Safety recap April, 2026
A short and longer run-through of the month, with links to further information and sources.
CIAT May 2026 briefing.
From medieval scribes to modern word art.
ECA welcomes crackdown on late payment and push for clean energy, whilst CIOB seek fixed cladding removal timeframes.
Cyber Security in the Built Environment
Protecting projects, data, and digital assets: A CIOB Academy TIS.
Managing competence in the built environment
ITFG publishes new industry guide on how to meet the ICC principles.
The UK's campaign to reduce noise pollution: Mythbusting, articles and topic guides.




















