Historical policy archive · Announcement: 10 March 2017 · Effective: 11 March 2017. This retrospective article was prepared on 3 October 2026. Its archive date matches the original government announcement.What changed?For residential properties purchased from 11 March 2017, the Seller’s Stamp Duty (SSD) window shortened from four years to three. Rates became 12% for a sale within the first year, 8% in...