What it costs
HomeGuide puts an installed prefab metal building on a slab at $20–$50 per sq ft and gives a 30 × 40 building with a slab at $24,000–$60,000, before site prep or interior finishing.
Run your own numbers in the barndominium cost estimator.
Worth knowing
- Decide door sizes early: RVs, tractors and trailers set the height
- Plan the wall between shop and house for fire separation and noise
- Heated or unheated shop changes insulation and HVAC cost
- Shop square footage costs far less than living space
What to send builders
- Shop width, length and eave height
- Overhead door sizes and count
- Heated or not
Questions
Should the shop be attached or separate?
Attached keeps everything under one roof and one slab; separate keeps noise and fumes away from the house. Builders can price both from the same request.
