Subsidiary dwelling exception
14(1)A purchased dwelling is not a qualifying dwelling if it is subsidiary to any of the other purchased dwellings.
(2)For the purposes of this paragraph, one of the purchased dwellings (“dwelling A”) is subsidiary to another of the purchased dwellings (“dwelling B”) if—
(a)dwelling A is situated within the grounds of, or within the same building as, dwelling B, and
(b)the amount of the chargeable consideration for the transaction which is attributable on a just and reasonable basis to dwelling B is equal to, or greater than, two thirds of the amount of the chargeable consideration for the transaction which is attributable on a just and reasonable basis to the following combined—
(i)dwelling A,
(ii)dwelling B, and
(iii)each of the other purchased dwellings (if any) which are situated within the grounds of, or within the same building as, dwelling B.