This page is timeless and should be accurate for any version of Foxhole.
Base Upgrades are new functionalities that Bases can unlock over time at a rate determined by the amount of player activity at the base. Certain base types have multiple upgrades trees and certain Upgrades have requirements before they can be progressed. You can check a Base's upgrade progress by opening its menu or by putting your mouse over its icon on the map.
Unlocking Rate
The unlocking rate of a Base's Upgrades follows the Player Activity at that Base. Player Activity is primarily determined by the number of online players that have this base assigned as their Home or Forward Base spawn point and are in the Region.
Player Activity is also influenced by the amount of supplies in a Base. If the Base has at least 800 Salvage (or 400 Basic Materials or other amount of items of equivalent value) in its stockpile, the unlocking rate increases. The increase is roughly equal to having one additional player spawn assigned to the Base.
Player Activity is also influenced by the amount of friendly structures within the Base's garrison range (e.g. 80m for Encampment). Each additional structure, or structure blueprint, in range increases the unlocking rate. The effect is maxed out after at least 5 structures are in range and is roughly equal to two additional player spawns assigned to the Base. Neutral structures such as Trenches, simple Bunker pieces, Barbed Wire, or Storage Boxes do not count. You can use your Hammer in Upgrade Mode on a structure to check for neutrality. Friendly world structures like Garrisoned Houses do count.
Additionally, a Base located in a Region Zone marked as "Neutral/Enemy" territory rather than "Friendly" will have an overall unlocking rate 3 times slower.
The unlocking rate of a particular Base Upgrade at Bunker Bases can also be stopped if its Infrastructure Modification requirement is not met.
If a Base's player activity is zero then the upgrade progress halts completely.
The visual progress of upgrades in the Base's menu updates every 5 minutes.
Upgrade Prioritization
For Bases with multiple upgrade trees, the unlocking rate is evenly split between the next available Base Upgrades of each tree. However, players that have their spawn at a particular Base can choose to prioritize one Upgrade over another by clicking on it (a green check mark appears). The Upgrade that is prioritized by the most players progresses the fastest.
Upgrades List
Base Upgrades available at Encampments.
Base Upgrades available at Keeps.
Base Upgrades available at Safe Houses.
Base Upgrades available at Town Bases.
Base Upgrades available at Relic Bases.
Base Upgrades available at Border Bases.
| Image
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Name
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Description
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Unlock Time*
"Friendly" Territory
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Unlock Time*
"Neutral/Enemy" Territory
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"BASE" Tree 
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Provisional Garrison
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A Provisional Garrison connects the base to nearby defensive structures (40m radius). Defensive structures will deactivate if player activity is too low (<10 player spawns assigned).
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5min
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10min
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For Bunker Bases some upgrades require Infrastructure, which is provided by building Infrastructure Modifications in bunkers connected to the base by trenches or bunkers. Once the upgrades are unlocked the required infrastucture can be removed without losing the upgrade.
Once an upgrade for a specific bunker garrison is unlocked, bunkers that are connected to the bunker base via trenches or bunkers can be modified to become that specific bunker garrison type. The maximum range of the bunker upgrades is a chain of 40 connected bunker/trench pieces (distance to Bunker Base is irrelevant), i.e. the upgrade doesn't reach a bunker if the shortest connection to the bunker base is a chain of more than 40 trench/bunkers. Once a particular bunker has been modified into a bunker garrison it won't lose its modification if its connection with the bunker base is severed, it can even still have its tier upgraded.
*Unlock Times listed here are approximate values and correspond to a Base's passive unlock time: zero player spawns assigned, 5+ friendly structures in range, 800+ Salvage (or equivalent value) in stockpile. Unlock times can be much shorter if many player spawns are assigned.
Gallery
Showcase of the Base Upgrades in the Devstream
