Jackson 24 ft. x 34 ft. multi room log cabin building kit | Hud-1 EZ Buildings This building includes 816 sq. ft. of interior space and a 144 sq. ft. covered porch and 288 sq. ft. loft area 960 total interior sq. ft. The building is an excellent addition for a homeowner to use as a hobby room, workshop, home office, garden house, guest room, weekend getaway cabin or just some additional living space. This is the perfect building for the DIY and easy weekend project to add more usable space without the expense of a room addition expenses.