How are variations valued under a JCT subcontract?

Section 5 of a JCT subcontract sets the rules, much as section 5 of the main contract does. First, you and your main contractor can simply agree a price, before or after the work. Second, where the direction asked you to quote, your accepted quotation sets the price. Otherwise the work is valued under the Valuation Rules, which run in a fixed order. Work like the work you priced, done in similar conditions and quantities, is valued at your rates. Where the conditions or the quantity have changed significantly, your rates are the basis, with a fair allowance for the difference. Work unlike anything you priced is valued at fair rates and prices. Omitted work comes off at your rates. Daywork is used only where the work cannot properly be valued by measurement. The rules also let other work be revalued if a variation substantially changes the conditions it is done in. Loss and expense, the cost of disruption or a longer job, stays out of the valuation. It has its own clause and its own notices. Check your amendments too, because they can change any of these rules. Then price each variation on the rule that fits it, and say which rule you used. When a valuation comes back on the wrong rule, answer it on the rule, not on the total. Our Variation Claim service values each variation under the rules your subcontract sets and presses it to agreement.