Upgrading the Sanctuary is the most important progression step in Last Asylum: Survival. Every building in your base is limited by the Sanctuary level, so if the Sanctuary stops progressing, your entire base eventually stops growing.
Each Sanctuary upgrade requires a combination of resources, stars, prerequisite buildings, diamonds, and construction time. As the levels increase, the cost and time grow dramatically, which makes preparation extremely important.
Stars are mainly earned from territory expansion, upgrading clinics, exploration battles, and defeating world map resource monsters. Construction time can also be reduced through bonuses such as Builder’s Hut level, alliance help, alliance research, Noble Fortress buffs, survivors, and Curio decorations.
Last Asylum Plague Sanctuary Upgrade Requirements Guide
Below is the full breakdown of the Sanctuary upgrade requirements from Level 1 to Level 30.
Sanctuary Level 1–5 Requirements
These levels introduce the basic base-building system and require very little time or resources.
Level 1
- Already built when starting the game
- No requirements
Level 2
- Farms: 32
- Lumber: 32
- Build time: 2 seconds
Level 3
- Farms: 983
- Lumber: 983
- Stars required: 17
- Build time: 3 seconds
Level 4
- Farms: 2,598
- Lumber: 2,598
- Stars required: 19
- Required buildings:
- Lumber Depot Level 1
- Granary Level 1
- Herb Storage Level 1
- Build time: 5 minutes
Level 5
- Farms: 19.7K
- Lumber: 19.7K
- Stars required: 28
- Required building:
- Walls Level 3
- Build time: about 11 minutes
Sanctuary Level 6–10 Requirements
These levels begin introducing military buildings and longer construction times.
Level 6
- Farms: 92.7K
- Lumber: 92.7K
- Stars required: 47
- Required building:
- Walls Level 5
- Build time: 34 minutes
Level 7
- Farms: 236K
- Lumber: 236K
- Stars required: 61
- Required buildings:
- Training Grounds Level 4
- Alliance Hall Level 3
- Build time: about 1 hour 30 minutes
Level 8
- Farms: 396K
- Lumber: 396K
- Stars required: 80
- Required buildings:
- Training Grounds Level 6
- Alliance Hall Level 5
- Build time: about 2 hours 50 minutes
Level 9
- Farms: 606K
- Lumber: 606K
- Herbs: 209K
- Stars required: 96
- Required buildings:
- Walls Level 8
- Alliance Hall Level 7
- Build time: about 4 hours
Level 10
- Farms: 749K
- Lumber: 749K
- Herbs: 233K
- Stars required: 112
- Required buildings:
- Walls Level 9
- Infirmary Level 7
- Build time: about 5 hours 30 minutes
Sanctuary Level 11–15 Requirements
These levels start requiring research buildings and Antitoxin production.
Level 11
- Farms: 1.9M
- Lumber: 1.9M
- Herbs: 602K
- Stars required: 142
- Required buildings:
- Training Grounds Level 10
- Research Lab Level 7
- Build time: about 6 hours 50 minutes
Level 12
- Farms: 3.1M
- Lumber: 3.1M
- Herbs: 959K
- Stars required: 155
- Required buildings:
- Research Lab Level 11
- Walls Level 10
- Antitoxin Workshop Level 7
- Build time: about 9 hours
Level 13
- Farms: 3.5M
- Lumber: 3.5M
- Herbs: 1.1M
- Stars required: 173
- Required buildings:
- Research Lab Level 12
- Alliance Hall Level 11
- Farm Level 7
- Build time: about 11 hours
Level 14
- Farms: 4.9M
- Lumber: 4.9M
- Herbs: 1.6M
- Stars required: 193
- Required buildings:
- Research Lab Level 13
- Warrior Statue Level 12
- Lumberyard Level 7
- Build time: about 14 hours
Level 15
- Farms: 6.4M
- Lumber: 6.4M
- Herbs: 2.3M
- Stars required: 201
- Required buildings:
- Research Lab Level 14
- Training Grounds Level 14
- Herb Garden Level 7
- Build time: about 20 hours
Sanctuary Level 16–20 Requirements
Upgrade times begin reaching multiple days during this stage.
Level 16
- Farms: 11.9M
- Lumber: 11.9M
- Herbs: 4.0M
- Stars required: 215
- Required buildings:
- Warrior Statue Level 14
- Research Lab Level 15
- Granary Level 7
- Build time: about 1 day 5 hours
Level 17
- Farms: 16.3M
- Lumber: 16.3M
- Herbs: 5.0M
- Stars required: 225
- Required buildings:
- Research Lab Level 16
- Barracks Level 15
- Lumber Depot Level 7
- Build time: about 1 day 15 hours
Level 18
- Farms: 27.1M
- Lumber: 27.1M
- Herbs: 9.0M
- Stars required: 231
- Required buildings:
- Research Lab Level 17
- Training Grounds Level 17
- Herb Storage Level 7
- Build time: about 2 days 6 hours
Level 19
- Farms: 31.1M
- Lumber: 31.1M
- Herbs: 10.8M
- Stars required: 237
- Required buildings:
- Research Lab Level 18
- Warrior Statue Level 17
- Antitoxin Workshop Level 10
- Build time: about 2 days 12 hours
Level 20
- Farms: 57M
- Lumber: 57M
- Herbs: 17.5M
- Stars required: 247
- Required buildings:
- Research Lab Level 19
- Alliance Hall Level 18
- Farm Level 10
- Build time: about 3 days 11 hours
Sanctuary Level 21–25 Requirements
This stage introduces extremely expensive upgrades and long construction timers.
Level 21
- Farms: 81.2M
- Lumber: 81.2M
- Herbs: 26.3M
- Stars required: 254
- Required buildings:
- Research Lab Level 20
- Training Grounds Level 20
- Lumberyard Level 10
Level 22
- Farms: 106M
- Lumber: 106M
- Herbs: 34.8M
- Stars required: 260
- Required buildings:
- Research Lab Level 21
- Warrior Statue Level 21
- Herb Garden Level 10
Level 23
- Farms: 137M
- Lumber: 137M
- Herbs: 40.4M
- Stars required: 270
- Required buildings:
- Research Lab Level 22
- Infirmary Level 22
- Granary Level 10
Level 24
- Farms: 168M
- Lumber: 168M
- Herbs: 55.1M
- Stars required: 282
- Required buildings:
- Research Lab Level 23
- Walls Level 23
- Lumber Depot Level 10
Level 25
- Farms: 260M
- Lumber: 260M
- Herbs: 91.2M
- Stars required: 292
- Required buildings:
- Research Lab Level 24
- Training Grounds Level 24
- Herb Storage Level 10
Sanctuary Level 26–30 Requirements
These are the late-game upgrades where construction times can reach multiple weeks or months without speedups.
Level 26
- Farms: 362M
- Lumber: 362M
- Herbs: 115M
- Stars required: 304
- Required buildings:
- Research Lab Level 25
- Warrior Statue Level 25
- Antitoxin Workshop Level 13
Level 27
- Farms: 512M
- Lumber: 512M
- Herbs: 158M
- Stars required: 314
- Required buildings:
- Research Lab Level 26
- Training Grounds Level 26
- Farm Level 13
Level 28
- Farms: 684M
- Lumber: 684M
- Herbs: 221M
- Stars required: 326
- Required buildings:
- Research Lab Level 27
- Barracks Level 27
- Lumberyard Level 13
Level 29
- Farms: 995M
- Lumber: 995M
- Herbs: 301M
- Stars required: 326
- Required buildings:
- Research Lab Level 28
- Alliance Hall Level 28
- Herb Garden Level 13
Level 30
- Farms: 1.3B
- Lumber: 1.3B
- Herbs: 415M
- Stars required: 326
- Required buildings:
- Research Lab Level 29
- Training Grounds Level 29
- Antitoxin Workshop Level 15
Sanctuary upgrades become extremely demanding after level 20, so planning ahead is essential.
Always upgrade prerequisite buildings early so they are ready when you need them. Keep the Builder’s Hut upgraded to reduce construction times and request alliance help whenever possible.
Stockpiling resources and speedups before starting a major upgrade can also prevent progress from slowing down.
A well-planned Sanctuary progression keeps your entire base developing smoothly and ensures your heroes and army continue growing stronger.
