We decided quite early in the process to excavate under our garage and take advantage of the 200 sqft that would have otherwise sat unused. I don't believe this is particularly common, but it's a relatively inexpensive way to maximize the space on a small lot. Our original intention was to use a product called Insul-Deck to support the garage floor, however we've since had to abandon this approach in favor of a straightforward concrete & rebar structural slab.

+ 360winnett.com

More 360 Winnett posts:

+ The 360 Winnett Project
+ 360 Winnett: Demolition
+ 360 Winnett: Foundation