Home/Production/Bunker Designs/Haven 4
Compact shelter
Haven 4: an underground bunker for 4.
A compact shelter for a household of four: an airlock entry, a bath, a protected mechanical bay, a galley and common room, and four bunks. Small enough to place beside an existing home, built to the same spec as everything we make.
Specifications
| Interior | 28 by 8 ft, 224 sq ft |
|---|---|
| Sleeps | 4 |
| Fresh air | About 160 cfm, filtered (40 cfm a person) |
| Air filtration | Blast valve, pre-filter, HEPA and impregnated carbon, positive pressure, hand-crank backup |
| Shielding | Designed for a protection factor of about 1,000 in the living space |
| Stored water | 120 gallons minimum (1 gallon a person a day for 30 days) |
| Radon | Sub-slab mitigation, tested below 2 pCi/L |
| Exits | Main entry through the airlock, plus an emergency exit |
Built for: Families who want a protected place on the land they already own, or a first step before a full compound.
What it costs
Our price,
and the market.
Styrkholm prices are installed in Utah and confirmed in writing after a site visit. Market ranges apply published per-square-foot figures for underground construction to the Haven 4's 224 square feet.
For comparison, published market ranges for the same size:
Source for per-square-foot ranges: ThePricer. More on cost: what a compound costs.
Delivered and installed
We put it in
and connect it.
Every design can be built as a stand-alone bunker. We handle the site, permits, excavation, setting, waterproofing, utilities, commissioning and training. How a bunker-only project works.
Are these plans ready to build?
They are reference layouts. Every Styrkholm bunker is engineered by a licensed structural engineer for its site, soil and water table, and the stamped drawings are produced in design.
Can a design be changed?
Yes. Rooms, length and finishes change with every household. The spec underneath, air, filtration, shielding, radon and exits, does not.
How is the price set?
Each design has an installed base price, and you add systems in the Bunker Builder at published prices. The final price is confirmed in writing after the site visit, because the ground, depth and access change the work.
Make it yours.
Tell us about your household and your land, and we will adapt the design to both. Consultations are private.