SDLTM29960 | Relief for transfers involving multiple dwellings: "off plan" transactions FA03/SCH6B/PARA7(5)-(6)
From HM Revenue & Customs · Stamp Duty Land Tax Manual
MDR has been abolished for transactions which complete, or which substantially perform (see SDLTM07850), on or after 1 June 2024, subject to special transitional rules (see SDLTM29902+.).
Special transitional rules relating to linked transactions, can be found at SDLTM2990
Where:
there is a contract to purchase a building, or part of a building, which is to be constructed or adapted under the contract for use as a dwelling or dwellings,
the contract is substantially performed before construction of the building, or part of the building, concerned has commenced and
the effective date of the transaction is deemed to be the date of substantial performance by virtue of FA03/S44/44A/45/45A or FA03/SCH17A/PARA12A or 19(3)
then, for the purposes of the relief, the main subject-matter of the transaction will be taken to consist of or include an interest in a dwelling.
For this purpose a contract includes any agreement including, not constituting a lease.
This is distinct from the scenario where a plot of land is purchased - possibly with planning permission for a dwelling - and with the intention to construct a dwelling, but no obligation to construct a dwelling exists.