Last edited 16 Feb 2026

Abortive work in building design and construction

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Abortive work (or abortive costs or abortive fees) refers to work that has been started or carried out, but is not needed, or is no longer needed, and will not form part of the final development. The work will be wasted. A similar term which may be used in the context of construction project planning is nugatory, which more specifically describes work that is of no value or consequence. Whilst similar terms the nuance is that abortive work is work which fails, failed to reach the intended outcome or was cut short (aborted), whereas nugatory work is useless, invalid, or work of no consequence. See also Nugatory work in building design and construction

Abortive work can occur at any stage of a project, relating to the tender process, the work of consultants or construction.

Abortive work can arise because of:

The occurrence of abortive work can be reduced by:

Where abortive work is carried out, the cost of those works will be allocated depending on the wording of the contract.

Very broadly, the costs may be borne by the client if the conditions set out in the contract have been met (sometimes referred to as abortive terms), if the client has accepted the risk for unknown items (such as ground conditions) or if there has been a breach of contract by the client.

Where a change has been instructed by the client in accordance with the contract that might result in abortive work, this may give rise to additions or deductions from the contract sum and may also (but not necessarily) require adjustment of the completion date.

Where the consultant or contractor has carried out unauthorised or non-compliant work, or they have accepted the risk for unknown items, they may bear the cost of abortive work.

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