SDLTM29875 | Interaction with Shared ownership
From HM Revenue & Customs · Stamp Duty Land Tax Manual
Relief may be claimed in respect of the grant of a shared ownership lease, whether the purchaser makes a market value election or chooses to pay SDLT in stages. This applies equally to shared ownership trusts where relief applies on the declaration of such a trust.
Where a shared ownership lease / trust is assigned to a new purchaser the SDLT treatment of this assignment will be the same as for the assignment of a normal lease. Therefore normal first-time buyers relief rules apply to the assignment and the consideration given for the assignment of the lease.
General guidance on shared ownership can be found on gov.uk at: https://www.gov.uk/stamp-duty-land-tax/shared-ownership-property