Construction projects: what do you need to consider in your relations with sub-contractors to ensure a smooth project in which you are legally protected?
As either an end client or main contractor on a construction project, when faced with negotiating the terms of a contract with a sub-contractor, there are multiple significant elements to consider. Amongst other external pressures such as the economic climate, the physical climate and funds flow, protections throughout the whole web of parties which are engaged in a construction project can be pivotal for a successful and compliant project in which your interests are adequately protected.
1. Consider the structure of the project
It is important to consider the structure of the construction project and the procurement route to be used. There are many structures of construction project employed across the industry, for example, two of the most common are:
- design and build – this is where the design and build elements of a project are left completely to the contractor instead of the responsibilities being split out, and risk is usually allocated to the contractor.
- traditional build – this is where the responsibility of the contractor is limited only to build, and the design works are the responsibility of the design team who are appointed by the end client.
- Ascertain which requirements the funder places on you, and such steps which are necessary to take in your sub-contracts to ensure you meet those funder requirements – these could be from administrative processes to provisions relating to the funders’ ESG strategies, for example.
- Take steps to make sure you have the systems and processes in place during the project and throughout the chain of relationships to keep the funder satisfied and ensure a legally protective project from your point of view as a project owner or main contractor.
- Ensure you comply with the measures required, such as any funder consents to appoint sub-contractors and also any insurance requirements they impose for the project.
- Seeking to decrease/increase (depending on which side of the fence you sit on) the opportunity for the sub-contractor to apply to you for price increases of materials. However, this may be a balancing act because you may not want a sub-contractor to struggle to finish a job because the cost to it of sourcing materials has risen. The position will vary depending on the nature of the project, leniency of the funder and timescales, however you would seek to legally limit this fluctuation as far as possible. The recent economic climate has led to a sharp increase in contractors looking to have greater flexibility around prices and fees e.g. through use of fluctuation provisions.
- Depending on which side of the fence you are sitting, a sub-contractor and end client or main contractor would negotiate the terms of when payment is to be made to the sub-contractor for off-site materials and what requirements must be in place before the contractor can apply for payment in respect of them.
- Limitation of liability – as an employer of a sub-contractor you may seek for the sub-contractor to be liable for as many heads of loss as possible because of the commercial and legal impact of breaches of the sub-contract. Conversely, the sub-contractor will want the opposite by limiting the heads of losses it is liable for and capping its overall liability under the contract.



