| Level | Warden Office Lv. Required | Food | Wood | Steel | Gasoline | Upgrade Time |
|---|---|---|---|---|---|---|
| 1 > 2 | 8 | 300 | 0:00:09 | |||
| 2 > 3 | 8 | 1300 | 0:00:45 | |||
| 3 > 4 | 8 | 3k | 600 | 0:02:15 | ||
| 4 > 5 | 8 | 10k | 2k | 0:04:30 | ||
| 5 > 6 | 8 | 30k | 6k | 1500 | 0:09:00 | |
| 6 > 7 | 8 | 120k | 24k | 6k | 0:18:00 | |
| 7 > 8 | 8 | 180k | 36k | 9k | 0:27:00 | |
| 8 > 9 | 9 | 400k | 80k | 20k | 0:40:30 | |
| 9 > 10 | 10 | 700k | 140k | 35k | 0:54:00 | |
| 10 > 11 | 11 | 900k | 900k | 180k | 45k | 1:07:30 |
| 11 > 12 | 12 | 1.2m | 1.2m | 240k | 60k | 1:21:00 |
| 12 > 13 | 13 | 1.6m | 1.6m | 320k | 80k | 1:39:00 |
| 13 > 14 | 14 | 2m | 2m | 400k | 100k | 2:06:00 |
| 14 > 15 | 15 | 3.3m | 3.3m | 660k | 165k | 2:42:00 |
| 15 > 16 | 16 | 4m | 4m | 800k | 200k | 4:34:00 |
| 16 > 17 | 17 | 6.5m | 6.5m | 1.3m | 325k | 5:29:00 |
| 17 > 18 | 18 | 9m | 9m | 1.8m | 450k | 6:35:00 |
| 18 > 19 | 19 | 11m | 11m | 2.2m | 550k | 9:52:30 |
| 19 > 20 | 20 | |||||
| 20 > 21 | 21 | 20m | 20m | 4m | 1m | 16:02:30 |
| 21 > 22 | 22 | |||||
| 22 > 23 | 23 | 30m | 30m | 6m | 1.5m | 1d 09:42:00 |
| 23 > 24 | 24 | |||||
| 24 > 25 | 25 | |||||
| 25 > 26 | 26 | 63.7m | 63.7m | 12.7m | 3.1m | 3d 03:57:00 |
| 26 > 27 | 27 | |||||
| 27 > 28 | 28 |