All Roofs Pty Ltd and Southgate Corporation Pty Ltd [2012] WASAT 178

Construction Contracts Act 2004 (WA) - Payment claim - Payment dispute - Claim arising under construction contract - Payment due under construction contract - Contract of variation - No variation or no oral variation term in original contract - Consideration and certainty for valid contract of variation - Alleged contract of variation not for extra work or work 'outside the contract' - No consideration for variation of contract - Claim in estoppel or unjust enrichment is not a claim under the construction contract

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