Variation Order
As Gaeilge: Ordú Athraithe
Also known as: VO, Change Order, Compensation Event
Last reviewed April 2026
A formal written instruction to change the scope of a public contract, must be agreed and documented before the work is done.
Under Irish public works contracts (PW-CF series), variations to the scope, specification, or programme must be issued by the engineer or contracting authority in writing as a Variation Order before the work is carried out. Pricing is generally based on the rates in the original Bill of Quantities; where no comparable rate exists, fair valuation applies. Verbal instructions are not enforceable. Disputes over variation pricing or entitlement are a leading cause of construction claims. EU procurement law (Regulation 72, S.I. 284/2016) restricts the size of permissible variations, material changes can require a new procurement competition.
Sources and legal basis
Primary legislation and official guidance. Always confirm the current text on the source before relying on it.
Related terms
PW-CF (Public Works Contract Form)
The standard Irish government construction contracts (PW-CF1–CF5) under the Capital Works Management Framework: fixed-price, non-negotiable.
Capital Works Management Framework (CWMF)
The suite of standard documents (contracts, conditions of engagement, guidance) that all Irish public bodies must use for construction procurement.
Contracting Authority
A public body that buys goods, services, or works with public funds: departments, councils, the HSE, ETBs, etc.
Modification of Contract
A change to a public contract during its term, allowed only within the limits of Regulation 72 without triggering a new procurement.
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