Grant v Edwards was an English Court of Appeal case on common intention constructive trusts.
It applied the decision in Eves v Eves [1975] and widened its effect to a 50% share in many future contributory common intention constructive trusts, where also an express intention is shown to have put the house into joint names, never fulfilled.
However in Grant v Edwards less work was done by the claimant and the explanation used was not one about a person's age being "not yet 21" in that case, which was a legal fiction used by the other party to deny ownership.
In this case "[the claimant] made a very substantial contribution to the housekeeping and to the feeding and bringing up of the children...
The court expressly followed Eves v Eves, a case of the same legal status, however in that case it was found a 25% share was fairer given the maintenance payments also due, deposit and mortgage payments entirely by the defendant, and state of the law at that time.