Has anyone done this? DW and I have decided to make this home last for the long haul. Less $$, earlier retirement, good neighborhood, easier upkeep, etc. We have two kids and plan on having more, and while we know it's no trauma for them to bunk, we'd like to turn our garage into a rumpus room/second family room for minimum cost. If permits and the like can be avoided (legally), that's a plus, too. Just making the room child safe, and a place where people would actually want to be. Quick estimate puts that will push our living space from 1762 to over 2100. The garage is attached, 3 steps down from the laundry room. Water heater in the corner.