In Mertens v. Home Freeholds Company (1921),2 K.B. 526, where the Court approved the law on this point as stated in an earlier edition of Hudson. In that case the contractor had undertaken to build to the roofing and the Court held:- The proper measure of damages was what it cost the plaintiff to complete the house substantially as it was originally intended and in a reasonable manner at the earliest moment he was allowed to proceed with the work, less any amount which would have been due and payable by the defendant to the plaintiff, had the defendant completed the house to the roofing at the time agreed by the terms of the contract.
WHEN APPELLATE COURT WILL INTERFERE IN DAMAGES AWARDED
An award of damages is within the discretionary powers of the court. An appellate court would not usually interfere with a previous award unless satisfied (a) that the trial court acted under a mistake of law; or (b) where the trial court acted in disregard of some principle of law; or (c) where it acted...