Steel Buildings With Living Quarters, Done Properly
Shop with an apartment, hangar home, barndo with a full second floor — combining work space and living space under one steel roof is the most requested layout in our designer. Three patterns dominate:
The three layouts that work
- End-bay quarters: living space in a 15–25 ft end bay, full-height shop in the rest. Simplest to permit and plumb.
- Mezzanine quarters: living space on a mezzanine level above the shop floor — the whole footprint stays workspace.
- Side-by-side barndo: home and shop split the footprint down a firewall. See the barndominium guide.
2026 cost picture
The shell prices like any steel building ($16–$26/sq ft erected). The living portion finishes at residential cost ($60–$120+/sq ft). A 40×60 with a 40×20 apartment bay typically lands at $120,000–$200,000 complete.
The code items that surprise people
- Occupancy separation: most jurisdictions require a fire-rated wall/ceiling between residential and shop space.
- Egress: bedrooms need egress windows — plan framed openings before the steel is engineered.
- Septic sizing is driven by bedroom count, not building size.
Design your building in 3D — free
Set the size, place every door and window, add a mezzanine, lay out the interior — then download a full drawing set and spec sheet. Free, and no phone call required.
Open the 3D Designer →Frequently asked questions
How much does a steel building with living quarters cost?
Plan on the shell at $16–$26/sq ft erected plus $60–$120+/sq ft for the finished living portion. A typical 40×60 shop with a one-bedroom end-bay apartment runs $120,000–$200,000 complete in 2026.
Can you legally live in a metal building?
Yes, if it's permitted as a residence (or mixed occupancy) with proper insulation, egress, and fire separation. The permit path is smoothest when living quarters are in the engineered plans from day one.