If money is no object, I would go with these guys if in the continental US. https://ultimatebunker.com/bunkers/
I was able to purchase 3 brand new (one trip) 40' shipping containers before covid hit so was still a great price & pulled most of my ideas from that website concerning ventilation/sewage. The most expensive parts of the build was 4 ft slab & filling in of cinder bricks so the walls will not collapse in time. The cutting & welding was a cinch, as well & I am adept at new work construction so I can work on the utilities little by little.
Almost forgot, I have my own backhoe to dig out the area in the side of a hill, so that saved some money. The crane service was 4k to drop in 3 containers though.
If money is no object, I would go with these guys if in the continental US.
https://ultimatebunker.com/bunkers/
I was able to purchase 3 brand new (one trip) 40' shipping containers before covid hit so was still a great price & pulled most of my ideas from that website concerning ventilation/sewage. The most expensive parts of the build was 4 ft slab & filling in of cinder bricks so the walls will not collapse in time. The cutting & welding was a cinch, as well & I am adept at new work construction so I can work on the utilities little by little.
Almost forgot, I have my own backhoe to dig out the area in the side of a hill, so that saved some money. The crane service was 4k to drop in 3 containers though.
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