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The Styrkholm CUBE
Steel cubes. Your plan.
Every Holm is built from the same part: a 10 x 10 ft steel cube that joins to other cubes on any side. Lay out your own bunker plan, give every cube a purpose, put the doors where you want them, and add cubes as your household grows. Complete from $251,900 installed.
The Holm line
Named by
the cube.
A Holm 2 is two cubes. A Holm 8 is eight, a 20 x 40. A Holm 6 can be a 20 x 30 or a 10 x 60, and odd numbers work too: a Holm 5 or 7 puts a decontamination or storage room off the side.
Holm 2
Two cubes: an entry and a bunk room for four. The smallest Holm, and the easiest to add to later.
$187,000structure, installed$251,900 complete with required systemsView the Holm 2 3 cubes · 10 x 30 or L · sleeps 6Holm 3
Entry, kitchen and bunks for six, in a straight run or turned into an L to fit the ground you have.
$254,500structure, installed$353,100 complete with required systemsView the Holm 3 4 cubes · 10 x 40 or 20 x 20 or L · sleeps 8Holm 4
Four cubes with a utility cube for air and power, so the machinery stays out of the living space. A 10 x 40, a 20 x 20 square or an L.
$322,000structure, installed$429,400 complete with required systemsView the Holm 4 5 cubes · L or 10 x 50 or 20 x 20 + side room · sleeps 10Holm 5
Five cubes: the living side and the sleeping side on separate legs, with a bath at the corner. Or a straight 10 x 50, or a square with a decontamination room off the side.
$389,500structure, installed$561,300 complete with required systemsView the Holm 5 6 cubes · 20 x 30 or 10 x 60 · sleeps 12Holm 6
Six cubes laid out like a small house, with kitchen and dining up front and utility, bath and bunks behind. A 20 x 30, or a long 10 x 60 where the ground is narrow.
$449,000structure, installed$620,800 complete with required systemsView the Holm 6 7 cubes · 20 x 30 + side room or L · sleeps 14Holm 7
The Holm 6 house plan with a decontamination cube added off the entry, so everyone washes down before going further in.
$516,500structure, installed$703,300 complete with required systemsView the Holm 7 8 cubes · 20 x 40 or U · sleeps 16Holm 8
A 20 x 40 for sixteen: decontamination at the entry, a medical cube, kitchen, dining and two bunk rooms by the exit.
$580,000structure, installed$766,800 complete with required systemsView the Holm 8 Any number of cubes · any shapeCustom
Build it however you want: an L, a U, a courtyard, a side room for decontamination or storage. Up to 24 cubes in the Builder, and larger layouts designed with us.
Your layoutpriced as you draw itDesign a custom HolmOne cube, one room
What a cube
can be.
Give every cube a job. Keep the machinery together, the sleeping cubes away from the entry, and the kitchen beside the bath so the plumbing stays short.
- Entry and airlockPut this cube behind the exterior door: the stair or hatch, the gas-tight door and the first seal against the outside.
- DecontaminationA sealed cube between the entry and the living space, to wash off fallout before going further in. Add the Decontamination room option for the shower and drain.
- Utility: air and powerFilters, blowers, batteries, inverters and controls in one cube, so machinery noise and heat stay out of the living space.
- CommunicationsRadios, the situational awareness screen and the antenna feeds, in a quiet cube near the entry.
- KitchenGalley counters, sink and cooking. The Water and Plumbing systems serve it, so it works best beside the bath or utility cube.
- DiningA table for the whole household, next to the kitchen.
- Living and commonSeating and open floor for the household to spend the day together.
- Bunks and sleepingBuilt-in bunks. We plan two people per cube across the whole layout; a bunk cube itself can hold four.
- Primary bedroomA private room with a full bed and storage.
- BathToilet, shower and sink. The Plumbing and Waste systems serve it.
- Medical and supplyFirst aid, medications and medical supplies in one place. The Medical system adds the equipment.
- Food and water storageShelving for long-term food and water. The Water system adds the tanks.
- Storage and vaultShelving, gear and a secure vault for documents and valuables.
- WorkshopA bench and tools for repairs.
How it is priced
Every part,
on the page.
Every side of every cube is an opening. A side that touches another cube is joined with a mate package; every outside side gets a door, an exit or an end cap. The Builder adds and counts every part for you, so nothing is left out.
Cube
$35,500Each 10 x 10 ft engineered steel module, delivered, crane set, sealed and backfilled.
Mate package
$4,000One on each cube at every joint, so two joined cubes open into one space.
Exterior door
$29,000The main entry: a gas-tight, blast-rated steel door with its stair or hatch.
Emergency exit
$14,000A second way out on a different side, used if the main entry is blocked.
End cap
$6,000A blank steel wall, welded and sealed, on every outside side without a door or exit.
Interior finish
$12,000 a cubeWalls, flooring, LED lighting, wiring and built-ins, in every cube.
Site package
$17,000 a jobExcavation, drainage, engineering for the whole layout, permits, inspections, commissioning and training.
Example: a Holm 3 is three cubes in a 10 x 30 with two joints. That is $106,500 of cubes, $36,000 of finish, four mate packages ($16,000), one door ($29,000), one exit ($14,000), eight end caps ($48,000) and the site package ($17,000): $254,500 before systems.
Bunker Builder
Drag it, turn it,
price it.
Drag room cubes onto the model, turn it in 3D, and watch the door, exit, mate kits and end caps fill in. Then choose your systems, see the installed price and reserve with a $5,000 deposit.
Questions
Before
you build.
What is the Styrkholm CUBE?
The steel module every Holm is built from: a cube 10 by 10 feet on the outside, about 9 feet 4 inches square inside with an 8 foot finished ceiling, that joins to other cubes on any side. At 10 feet wide it travels on a flatbed under a standard oversize permit. Lay them in a straight run like a 10 by 40, a square like a 20 by 20, an L, a U or a larger grid, give every cube its own use, and add cubes later.
Why are Holms named by number?
The number is the number of cubes. A Holm 2 is two cubes and a Holm 8 is eight, so a Holm 8 can be a 20 by 40, and a Holm 6 can be a 20 by 30 or a 10 by 60, depending on the ground you have.
How is a Holm priced?
Each cube is $35,500 plus $12,000 of interior finish. Every joint between two cubes takes a mate package on each cube at $4,000 each. Every outside side gets an exterior door ($29,000), an emergency exit ($14,000) or an end cap ($6,000). Each job has one $17,000 site package. Systems are added on top.
What can each cube be used for?
Any room a household needs: an entry and airlock, decontamination, a utility cube for air and power, communications, kitchen, dining, living, bunks, a primary bedroom, a bath, medical and supply, food and water storage, storage and a vault, or a workshop.
How many people does a Holm sleep?
We plan 2 people per cube across the whole layout, so a Holm 3 sleeps 6 and a Holm 8 sleeps 16. Air and power systems are sized up automatically as the layout grows.
Can I add cubes later?
Yes. Leave an end cap where the next cube will go and we can open it and mate a new cube to it later, subject to the site and the engineering.
Is the pricing final?
Cube prices are preliminary while engineering for the cube system is completed. Every price is confirmed in writing after the site visit, as with every Styrkholm build.
More from Production
Bunker Builder
Drag in your rooms, turn your layout in 3D, choose every system, see the price and reserve online.
Open ProductionThe Holm line
Holm 2 to Holm 8, built from steel cubes, with 3D layouts and installed prices.
View SystemsBunker systems
Air, power, water, heat, plumbing, waste, medical, communications, situational awareness and protection, priced.
ViewProduction
Talk through
a layout.
Tell us the size you have in mind and where it will go. We reply personally, usually within one business day.