Last Shelter Survival – Base Upgrade Requirements (2026)

This guide is about Last Shelter Survival base upgrade requirements. You will get base level wise upgrade requirements – Electricity, oil, cash, lumber, iron, food, time, population and more requirements.

📅 Last Updated: May 8, 2026

Base in Last Shelter Survival is Core building and determines what your city level is. To unlock more buildings, level up and for additional benefits you Need to upgrade the base building.

And, there are some requirements to upgrade Last Shelter Base building, which are listed below for each level.

Last Shelter Survival – Base level 1 requirements

• None

Last Shelter Survival – Base level 2 requirements

• Cash – 210
• Lumber – 190
• Food – 50
• Time – 00:00:12
• Requirements – Ration Truck lvl 1
• Combat Power – 2551

Last Shelter Survival – Base level 3 requirements

• Oil – 200
• Cash – 320
• Lumber – 290
• Food – 100
• Time – 00:00:50
• Combat Power – 2771

Last Shelter Survival – Base level 4 requirements

• Electricity – 295
• Oil – 800
• Cash – 710
• Lumber – 860
• Time – 00:02:00
• Combat Power – 2985

Last Shelter Survival – Base level 5 requirements

• Oil – 1K
• Cash – 1.1K
• Lumber – 1.5K
• Iron – 500
• Food – 960
• Time – 00:11:50
• Requirements – Ration Truck lvl 4
• Combat Power – 3194

Last Shelter Survival – Base level 6 requirements

• Cash – 3.2K
• Lumber – 3.6K
• Iron – 1.3K
• Food – 1.8K
• Time – 00:34:59
• Requirements – Ration Truck lvl 5, Bank lvl 5, House lvl 5, Garrison lvl 1
• Combat Power – 3404

Last Shelter Survival – Base level 7 requirements

• Electricity – 4.9K
• Oil – 13K
• Cash – 8.5K
• Lumber – 25K
• Iron – 19K
• Food – 13K
• Time – 01:33:40
• Requirements – Wind Turbine lvl 6, Ration Truck lvl 6
• Combat Power – 3624

Last Shelter Survival – Base level 8 requirements

• Electricity – 9.9K
• Oil – 25K
• Cash – 58K
• Lumber – 50K
• Iron – 37K
• Food – 25K
• Time – 03:07:20
• Requirements – Lumber Mill lvl 7, Ration Truck lvl 7
• Combat Power – 3871

Last Shelter Survival – Base level 9 requirements

• Electricity – 18K
• Oil – 49K
• Cash – 100K
• Lumber – 98K
• Iron – 74K
• Food – 49K
• Time – 04:22:10
• Requirements – House lvl 8, Ration truck lvl 8
• Combat Power – 4138

Last Shelter Survival – Base level 10 requirements

• Electricity – 28K
• Oil – 69K
• Cash – 180K
• Lumber – 150K
• Iron – 100K
• Food – 69K
• Time – 05:40:50
• Requirements – Hospital lvl 9, Ration Truck lvl 9
• Combat Power – 4426

Last Shelter Survival – Base level 11 requirements

• Electricity – 42K
• Oil – 96K
• Cash – 280K
• Lumber – 200K
• Iron – 150K
• Food – 96K
• Time – 07:23:00
• Requirements – Lumber Mill lvl 10, Ration Truck lvl 10
• Combat Power – 4745

Last Shelter Survival – Base level 12 requirements

• Electricity – 62K
• Oil – 160K
• Cash – 420K
• Lumber – 300K
• Iron – 250K
• Food – 160K
• Time – 09:35:50
• Requirements – Farm lvl 11, Ration Truck lvl 11
• Combat Power – 5105

Last Shelter Survival – Base level 13 requirements

• Electricity – 93K
• Oil – 260K
• Cash – 590K
• Lumber – 500K
• Iron – 400K
• Food – 260K
• Time – 12:28:39
• Requirements – Ration Truck lvl 12, Lumber Mill lvl 12
• Combat Power – 5522

Last Shelter Survival – Base level 14 requirements

• Electricity – 140K
• Oil – 410K
• Cash – 830K
• Lumber – 800K
• Iron – 600K
• Food – 410K
• Time – 16:13:10
• Requirements – Shooting Range lvl 13, Ration Truck lvl 13
• Combat Power – 6015

Last Shelter Survival – Base level 15 requirements

• Electricity – 200K
• Oil – 730K
• Cash – 1.1M
• Lumber – 1M
• Iron – 1M
• Food – 730K
• Time – 22:48:06
• Requirements – Ration Truck lvl 14, Bank lvl 14
• Combat Power – 6646

Last Shelter Survival – Base level 16 requirements

• Population – 70 k
• Electricity – 300K
• Oil – 1M
• Cash – 1.6M
• Lumber – 2M
• Iron – 1.5M
• Food – 1M
• Time – 1D 03:38:33
• Requirements – Embassy lvl 15, Ration Truck lvl 15
• Combat Power – 7474

Last Shelter Survival – Base level 17 requirements

• Electricity – 500K
• Oil – 2M
• Cash – 2.5M
• Lumber – 3M
• Iron – 2.5M
• Food – 2M
• Time – 1D 16:38:30
• Requirements – Vehicle Factory lvl 16, Ration Truck lvl 16, Garrison Hall lvl 16
• Combat Power – 8580

Last Shelter Survival – Base level 18 requirements

• Electricity – 700K
• Oil – 4M
• Cash – 4.4M
• Lumber – 5M
• Iron – 4M
• Food – 4M
• Time – 2D 06:10:43
• Requirements – Farm lvl 17, Ration Truck lvl 17
• Combat Power – 10078

Last Shelter Survival – Base level 19 requirements

• Population – 120K
• Electricity – 1M
• Oil – 7M
• Cash – 7M
• Lumber – 10M
• Iron – 8M
• Food – 7M
• Time – 4D
• Requirements – Power Plants lvl 18, Ration Truck lvl 18
• Combat Power – 12129

Last Shelter Survival – Base level 20 requirements

• Electricity – 1.4M
• Oil – 12M
• Cash – 13M
• Lumber – 20M
• Iron – 16M
• Food – 12M
• Time – 4D 14:00:54
• Requirements – Oil Well lvl 19, Ration Truck lvl 19
• Combat Power – 14957

Last Shelter Survival – Base level 21 requirements

• Electricity – 1.8M
• Oil – 19M
• Cash – 17M
• Lumber – 38M
• Iron – 28M
• Food – 19M
• Time – 5D 23:39:54
• Requirements – Water Filter lvl 20, Ration Truck lvl 20
• Combat Power – 18601

Last Shelter Survival – Base level 22 requirements

• Population – 210K
• Electricity – 2.3M
• Oil – 28M
• Cash – 21M
• Lumber – 57M
• Iron – 42M
• Food – 28M
• Time – 7D 14:37:57
• Requirements – Ration Truck lvl 21, Bank lvl 21
• Combat Power – 23309

Last Shelter Survival – Base level 23 requirements

• Electricity – 3M
• Oil – 38M
• Cash – 25M
• Lumber – 76M
• Iron – 57M
• Food – 38M
• Time – 8D 15:58:25
• Requirements – Refinery lvl 22, Ration Truck lvl 22
• Combat Power – 29402

Last Shelter Survival – Base level 24 requirements

• Electricity – 3.4M
• Oil – 50M
• Cash – 29M
• Lumber – 99M
• Iron – 74M
• Food – 50M
• Time – 13D 13:11:50
• Requirements – Ration Truck lvl 23, Vehicle Factory lvl 23
• Combat Power – 37902

Last Shelter Survival – Base level 25 requirements

• Population – 350K
• Electricity – 3.9M
• Oil – 60M
• Cash – 34M
• Lumber – 120M
• Iron – 89M
• Food – 60M
• Time – 19D 07:17:47
• Requirements – Embassy lvl 24, Ration Truck lvl 24
• Combat Power – 49774

That’s it,

Hope you find this Last Shelter: Survival base upgrade requirements list helpful.

Update Log

• May 8, 2026: Full review — verified all information reflects current game state. Updated for May 2026.
• January 2026: New year refresh — updated all content for 2026.
• 2025: Original article published.

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This guide was last reviewed and updated on May 8, 2026. All information reflects the current state of Last Shelter Survival – Base Upgrade Requirements as of May 2026.

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