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Bunker Builder

Design your Holm in 3D.

Start from a Holm 2 to Holm 8 or a custom layout. Drag in rooms, turn the model in 3D, and every mate kit, door, exit and end cap is added for you. Choose each system, see the installed price as you go, and reserve with a $5,000 deposit credited to your project.

Step 1

Choose a size.

The number is the number of 10 x 10 ft steel cubes. Pick one, then pick the shape that fits your ground, or go custom and build any shape you want.

Step 2

Drag in your rooms.

Drag a room onto the model and it snaps to the side you drop it on, or tap a room to add it. Every part it needs is added for you: mate kits where cubes join, the exterior door on the entry, the emergency exit on the far bunk room, and end caps on every other outside wall.

Drag the background to turn · Drag a cube to move it · Click a cube to change its use

Floor plan and openings by hand

Click a square next to your layout to add a cube. Click an outside wall to switch it between an end cap, an exterior door and an emergency exit.

End capExterior doorEmergency exitMate kit

Step 3

Choose your systems.

Required systems start at the minimum tier for the number of people your layout sleeps. Every option shows its installed price.

Step 4

Add options.

Priced one by one. Add or remove anything and the total updates.

Step 5

Reserve your build.

The $5,000 deposit starts work on your bunker right away: the site visit, soil evaluation, engineering and design. It reserves your production slot and is credited in full to your project. Because that work begins immediately, the deposit is non-refundable. Cube prices are preliminary while engineering for the cube system is completed; your final price is confirmed in writing after the site visit. Payment is processed securely by Stripe.

What the price covers

Cubes, joints
and the site.

Every part of the structure is listed and priced, so the total is the installed price before site conditions.

Each cube

  • Engineered steel module, 10 x 10 ft outside and about 9 ft 4 in square inside, with an 8 ft finished ceiling and stamped drawings
  • Delivered within 100 miles of Ogden, Utah, crane set, sealed and backfilled
  • Exterior coating and waterproofing
  • Lifting and alignment points so cubes join on any side
  • Interior walls, flooring, LED lighting and 12V/120V wiring in every cube
  • Bunks, galley counters or storage built in as the layout calls for

Joints and openings

  • Mate package on both cubes at every joint: gasketed steel frame, bolted and sealed, opening the two cubes into one space
  • Exterior door: gas-tight, blast-rated steel door with stair or hatch
  • Emergency exit on a different side
  • End caps welded and sealed on every other outside side

Site package and extras

  • Excavation in normal soil, bedding and perimeter drainage
  • Engineering stamp for the whole layout, permits at cost and inspections
  • Commissioning and household training
  • Quoted after the site visit: distance beyond 100 miles
  • Quoted after the site visit: rock excavation or groundwater dewatering
  • Quoted after the site visit: utility tie-ins, well drilling and septic
  • Quoted after the site visit: site clearing, access roads and restoration
Installed total$0Reserve