This is in the mountains and I only want the building as one big room. No appliances, electric, etc. just one basic room, 500 square feet.
just call a local contractor and ask them.
Many locations would never allow a 500 square-foot house
This is a rural prop, everything is allowed.
And the tuff shed would be perfect but I'm trying to build a circular home.
Depends on what you want prefab or stick built could prolly do both by the way for that sqft depending on cost for utilities etc.
If in the mountains and one room block is a good option. Wouldn't be a perfect circle but you could get close. I think you could build that if no utilities and just a box with a metal roof for like 10k maybe less.
Hard to say not knowing so many specifics, but could be done in my market outside the city limits. I built a 1000 SF cabin for $55k in 2011. I GC'ed, but did no actual construction work.
If you visit the slums in Kenya, they can prove that a 500 sq ft house can be built for less than $50. I wouldn't put it past some of us Americans who could spend 250k on the same size place. Just depends on weather you want it made outa sticks and mud, our build the whole thing outa custom cut granite blocks...
Could be as cheap or as expensive as you want
I saw this guy on instagram who built some amazing homes in rural/forest areas. His handle is jacobwitzling cabin builder.
@Derek Bernhard , would you consider a geodesic dome?
That's too much for circular wall and roof.