Harper James is a UK full-service commercial law firm advising ambitious businesses on the laws of England and Wales, including construction matters. The right construction contract depends on the project’s design responsibility, procurement route, pricing certainty, programme, risk allocation and the parties’ ability to manage change.
For a traditional arrangement, the employer appoints a design team and the contractor builds to that design. A JCT Standard Building Contract is commonly considered where the design is substantially complete before construction starts. A JCT Design and Build Contract places greater design responsibility with the contractor. For projects requiring early contractor involvement, collaboration and detailed management procedures, NEC4 contracts offer a different structure, including early warning and compensation event mechanisms. A short-form contract suits smaller, lower-risk work, but it still needs clear provisions on scope, payment, defects, insurance and termination.
Price is another central decision. A lump-sum contract gives the employer greater cost visibility when the scope is well defined. Remeasurement or target-cost arrangements are more suitable where quantities or design development remain open. Before signing, prepare a responsibility matrix covering design, ground conditions, approvals, materials, utilities, delay and inflation. Further construction contract guidance can support a more detailed comparison of standard forms and project risks.
The Building Safety Act 2022 has increased the importance of clear accountability for design and construction on relevant projects, particularly higher-risk buildings. The contract should identify dutyholder responsibilities, information requirements, competence expectations and approval gateways where applicable. It should also align the building contract with consultant appointments, warranties, insurance and any funder requirements.
Payment provisions need equal attention. Set out valuation dates, payment notices, pay less notices, retention, final account procedures and the consequences of non-payment. Construction contracts also need a workable process for variations, extensions of time, loss and expense, suspension, termination and dispute resolution. Adjudication remains an important statutory route for construction disputes, so notice provisions and project records should be maintained from the start.
Do not select a form solely because it was used on a previous job. Review the contract particulars, amendments and schedules against the actual procurement plan. Confirm that the scope documents do not conflict, that precedence clauses work, and that the programme and pricing assumptions are recorded. A lawyer can then test whether the proposed allocation of design, delay, payment and regulatory risk matches the commercial deal before signature.