Jurisdiction(s):
United Kingdom

Key definition

Variation definition

What does Variation mean? A variation is a change to the agreed works, services, specification, quantities, timing or price after the contract has been formed. The term is descriptive rather than statutory, but is commonly defined and regulated in standard forms (for example, JCT “variations”; NEC uses “compensation events”) and in bespoke change control provisions. Variations are usually governed by a Change Protocol or change control procedure that sets parameters for instructing, approving and pricing changes, allocating risk, and adjusting programme, milestones and payment. valuation typically follows contract rates, dayworks or a reasonable cost basis. Proper authority, notices and records are critical. Key legal...

Precedent: Letter of Variation to Building Contract (construction project), including clause and Employer’s Requirements changes

Published by a LexisNexis Construction expert

Precedents

[ Headed paper of the Employer ]

To: [ insert Recipient’s name and postal address ]

Date: [ insert date here ]

Dear [ insert the recipient organisation’s name ],

[ Insert name of project ] ('the Project')

We refer to your engagement as the building contractor for the Project, pursuant to a contract dated [ insert date of building contract ] ('the Building Contract')...

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Web page updated on 22/05/2026

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