We re-worked an old 32 x 56 pole barn on a property my Son bought last year. We built an 8x8 insulated room in the back corner to use for a combination rest room, compressor
room and heated storage. That way you could about keep it above freezing with a heat lamp bulb. We used an insulated steel entrance door. The shop has 12 foot ceilings, so
it is a nice little storage mezz above. In MN, I wouldn't think twice about should I, shouldn't I use the floor space for a toilet.
room and heated storage. That way you could about keep it above freezing with a heat lamp bulb. We used an insulated steel entrance door. The shop has 12 foot ceilings, so
it is a nice little storage mezz above. In MN, I wouldn't think twice about should I, shouldn't I use the floor space for a toilet.

Also you won't have a drain to loose dropped screws in or to snag the wheels on a creaper.