A construction project brief is the owner’s written statement of what the project must achieve and the constraints it must respect. It gives designers, cost advisers and tenderers one basis for decisions; it is more useful than an early sketch alone.

What belongs in the brief?

State the business purpose, users, required spaces and performance, building condition, budget basis, target dates, approvals, sustainability or operational requirements and handover information. For an occupied facility, include access, staging, service continuity and tenant communication. Name the owner decision makers and the method for resolving competing priorities.

How detailed should it be?

Early briefs may identify outcomes and unknowns. As surveys and design develop, convert assumptions into measurable requirements. For example, “minimal disruption” becomes permitted shutdown windows and agreed access routes. Record what is fixed, what can change and which requirements need validation by a consultant or authority.

Why does it matter at tender?

If the brief does not define what matters, tenderers may price different solutions. A design and construct tender particularly needs clear client requirements and a method for checking the proposed design against them. Keep a revision record and issue changes to all tenderers through the agreed process.

A practical review question is whether someone who missed the early meetings could use the brief to choose between two credible designs. If not, the document may describe ambition but leave critical trade-offs unstated. Add decision criteria before asking the market for a fixed price.

The brief is a live control document until requirements are settled; it should not quietly change through informal conversations. Our design management guide shows how to carry it through delivery.

Sources and further reading

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