My house has three floors, with part of the ground floor forming a self-contained part with kitchen/diner, shower room/toilet and a bedroom. I am considering living on the upper two floors while I do not need all the space and letting part of it out to help pay down the mortgage.
I believe that because the ground floor part is self-contained, the Rent-a-Room scheme would not be applicable if letting it out and thus any rental income from it would be taxable at my normal tax rate (unless I could take into account an amount of mortgage interest, proportional to the area, perhaps one third or one quarter)?
However if at the same time I let out a room in the two floors above, where I live (sharing living room, kitchen and/or bathroom), would that qualify for the Rent-a-Room scheme?
Thank you.