A potential class action legal case could seek up to £4.5 billion in damages from major housebuilding firms in Great Britain. The claim is brought on behalf of new home buyers and targets seven of the UK’s largest housebuilders. The case alleges issues affecting buyers of new-build homes, with the group representing people who purchased such properties during a defined period.

According to reports, the lawsuit could cover more than 700,000 people who bought new build homes between October 2015 and 24 June 2026. The claim is structured as a collective action, aiming to consolidate proceedings rather than rely on individual lawsuits. If the action succeeds, the total sought could reach £4.5 billion, though the amount would ultimately depend on the court’s findings. The reports also frame the case as a significant legal risk for the firms involved, given the large number of potential claimants.