When our residential home project wasn’t able to get financing we started looking for solutions to bringing costs down. One of our ideas to get more space was to put up an outbuilding. We looked into prefab units, but found we could build cheaper or equal to everything out there. In particular, we found you can have a custom steel frame (think pole barn) structure manufactured and shipped to us rather inexpensively. The steel frame gives exceptional strength for wind and roof loads (great for Michigan snow) and provides a surface for mounting both interior and exterior walls. Another bonus is being able to use concrete on a second floor and flattening a roof pitch down to 12 : 1/2.
Some of the features of this plan include:
- Guest Bedroom
- Full Bathroom
- Lofted Office
- Spray Foam Insulated
- Radiant Heated Floors
The steel frame building comes with all of the window and door holes cut out and goes together like a giant erector set. The frame is then clad in 24-26 gauge corrugated steel sheets. We planned to cover the steel in 4′ x 8′ sheets of smooth cement board paired with aluminum channel trim. Building costs, including finishing the inside with dry wall, came in around $80 sq/ft.