At the Joiners' Guild, crude Lumber is transformed into strong Planks that are necessary for improving the Order Citadel. Upgrading the Joiners' Guild speeds up processing and increases the amount of the produced resource.
| Level | Time | Lumber | Silver | Marble | Cast Iron | Rations | Tokens | Drafts | Requirements | Order Citadel Power | Maximum of resource received | Transformation Speed | Transformation Cost |
| 1 | 1w 3d 00h 00m 00s | 20 000 000 | 10 000 000 | 2 000 | 2 000 | 100 | Hewers' Guild 1 | 62 000 000 | 2 000 | 0% | 0% | ||
| 2 | 2w 1d 00h 00m 00s | 3 950 | 2 000 | 3 950 | 1 400 | 125 | Hewers' Guild 2 | 86 500 000 | 2 000 | 2% | 1% | ||
| 3 | 6w 2d 00h 00m 00s | 31 400 | 15 800 | 31 400 | 11 000 | 150 | Hewers' Guild 3 | 125 000 000 | 2 000 | 4% | 2% | ||
| 4 | 9w 5d 00h 00m 00s | 34 000 | 17 000 | 34 000 | 12 000 | 185 | Hewers' Guild 4 | 170 000 000 | 2 000 | 7% | 3% | ||
| 19w 4d 00h 00m 00s | 20 000 000 | 10 000 000 | 71 350 | 34 800 | 71 350 | 24 400 | 560 | 443 500 000 |
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