Rust Bunker Base Design (2026)
For solo & small teams · 2x2 core with a sealed bunker below, two storeys, sheet metal throughout
A base built around a bunker — a loot room sealed behind a wall or foundation that can only be opened via a mechanism (garage door, wall stack). Forces raiders to pay for an extra wall.
Bunker Base build cost
The reference build we cost is a 2x2 core with a sealed bunker below, two storeys, sheet metal throughout — 36 building blocks plus doors and a tool cupboard. Every rate below is what the game charges for that piece: the twig it is placed as, then the upgrade. A floor or roof costs half a wall, a doorway or window 70%.
| Piece | Qty | Cost each |
|---|---|---|
| Sheet metal foundation | 4 | 50 wood + 200 metal frags |
| Sheet metal floor | 4 | 25 wood + 100 metal frags |
| Sheet metal wall | 21 | 50 wood + 200 metal frags |
| Sheet metal doorway | 2 | 35 wood + 140 metal frags |
| Sheet metal wall frame | 1 | 25 wood + 100 metal frags |
| Sheet metal roof | 4 | 25 wood + 100 metal frags |
| Garage door | 1 | 300 metal frags + 2 gears |
| Sheet metal door | 2 | 150 metal frags |
| Tool cupboard | 1 | 1,000 wood |
| Total | 6,780 metal frags · 2,545 wood · 2 gears | |
Bunker Base upkeep
Rust bills upkeep by building-block count: 10% of build cost per day for the first 15 blocks, 15% for the next 50, 20% for the next 125 and 33.3% after that. At 36 blocks this design pays a blended 12.9% a day, doors included; the tool cupboard itself costs nothing to keep.
Over a full seven-day wipe cycle that is 6,132 metal frags — the number worth checking before you commit to a size. Work out how long your TC lasts.
What it costs to raid
Cost of the cheapest route from outside to the loot room, searched by the base planner on the exact piece list above — doors included, because a door on the outside is what a raider actually breaks.
| Raider has to break | Rockets | C4 |
|---|---|---|
| 2× Sheet Metal Door | 4 | 2 |
| 1× Garage Door | 3 | 2 |
| Total | 7 | 4 |
That is 9,800 sulfur in rockets, or 8,800 sulfur in C4. The cheapest method that can break the whole path is 276× explosive 5.56 ammo at 6,900 sulfur. Compare every explosive.
Pros
- checkAdds raid cost cheaply
- checkHides the true loot room
Cons
- closeFiddly to build correctly
- closeCan trap you if done wrong
Test your bunker mechanic before wipe — a broken bunker leaves loot exposed.
Building and raid data verified against Livestock. The piece list above is our reference build for this archetype, published so the totals can be checked — your own layout will differ.
Compare with other designs
Related guides
A no-BS Rust base building guide: building tiers, upkeep, tool cupboards, bunkers, airlocks and honeycomb, plus the raid costs that actually matter.
A real player's Rust raid guide: exact sulfur costs per structure, C4 vs rockets vs satchels vs eco raiding, online/offline tactics and defence.