We live in terraced housing, no garage, just a walled backyard (Coronation Street style) - I do however, have my 12ft x 7ft brick built shed (dry dock), complete with a little oil filled radiator just like Mersey Dave says.
The shed only has room for 1 person to work in reasonable comfort - Bonus.
The only downside for me is that I have to share the space with 2 chest freezers - but that's a small price to pay for the pleasures of building model boats.
Again, like Dave, I find "real peace" in there and sometimes spend hours just contemplating future builds or making notes of what needs doing next on the current build and in what sequence.
No wonder it takes me so long to complete my models.
Regards,
Ray.