A relief from SDLT was introduced in the November 2017 Budget to exempt purchases by first-time buyers of properties costing up to £300,000. This is being extended to shared ownership properties valued at up to £500,000. The exemption will apply to the initial share purchased up to £300,000 (any excess over that figure will be charged at 5%). Further shares will not qualify for the exemption. This relief is being backdated to the introduction of the original first-time buyers relief on 22 November 2017.