This is a research that can be studied in the city's Science Center. Each upgrade increases lumber production by 10% (20% for level 11+).
Researching Woodcraft is essential to research Levitation.
| Levels | Research Times | Cost | Requirements | |||
| Gold | Lumber | Metals | Lumbermill | Science Center | ||
| 1 | 8m 11s | Level 1 | Level 1 | |||
| 2 | 16m 34s | 2,400 | 1,000 | 200 | Level 2 | Level 2 |
| 3 | 33m 33s | 4,800 | 2,000 | 400 | Level 3 | Level 3 |
| 4 | 1h 7m 57s | 9,600 | 4,000 | 800 | Level 4 | Level 4 |
| 5 | 2h 17m 36s | 19,200 | 8,000 | 1,600 | Level 5 | Level 5 |
| 6 | 4h 38m 38s | 38,400 | 16,000 | 3,200 | Level 6 | Level 6 |
| 7 | 9h 24m 15s | 76,800 | 32,000 | 6,400 | Level 7 | Level 7 |
| 8 | 19h 2m 37s | 153,600 | 64,000 | 12,800 | Level 8 | Level 8 |
| 9 | 1d 14h 33m 49s | 307,200 | 128,000 | 25,600 | Level 9 | Level 9 |
| 10 | 3d 6h 5m 29s | 614,000 | 256,000 | 51,200 | Level 10 | Level 10 |
| 11 | 3d 15h 17m 20s | 614,000 | 256,000 | 51,200 | Level 10 | Level 11 |
| 12 | 4d 13h 6m 40s | 614,000 | 256,000 | 51,200 | Level 10 | Level 12 |
| 13 | 5d 16h 23m 20s | 614,000 | 256,000 | 51,200 | Level 10 | Level 13 |
| 14 | 5d 16h 23m 20s | 614,000 | 256,000 | 51,200 | Level 10 | Level 14 |
| 15 | 5d 16h 23m 20s | 614,000 | 256,000 | 51,200 | Level 10 | Level 15 |
| 16 | 5d 16h 23m 20s | 768,000 | 320,000 | 51,200 | Level 10 | Level 16 |
| 20 | 5d 16h 23m 20s | 768,000 | 320,000 | 64,000 | Level 10 | Level 20 |