Well, child flat...
We are selling our house & hoping to buy a house with a detached brick-built garage with a high ceiling. The present owner keeps his pride & joy motor in there.
DS is nearly 21, lives at home and for 3 years has worked for a building company, doing high-end barn conversions & extensions. He wants to convert the garage, put in woodburner, mezzanine floor, kitchenette & shower room. So although we would gain an annexe we would lose parking for the pride & joy. Good idea or no, wrt to future selling? We would have a big shed for lawnmower & other crapola.