In the UK, "permitted development" allows you to put in abuilding up to 4m high with a pitched roof, in your garden, so long as not more than 1/2 your garden is covered with buildings, and so long as it is no less than 20m from a road.
In the fortunate position of being able to do this and wanting to put an R44 in it, has anyone else done it and have plans or a company who can knock something up?
BW