CK3 DatabaseCrusader Kings III · 1.20.0.3 “Crozier” · unofficial
Castle, the game's painting
Built in a castle — the game's painting of one (western style).

Regular building

Windmills

+3.85/month Tax+34% Holding Taxes+80% Supply Limit+34% Development Growth+1 morewindmills_01

Windmills are located in areas where the winds are usually the strongest, like on hills or by the coasts. Unlike watermills, windmills are not stopped by the freezing of the rivers and can grind all year long.

Built in

Holding types whose building list names it (common/holdings).

Levels

LevelCostTimeLeviesGarrisonMain effects
1. Simple Windmills200 gold1825 d——+0.7/month Tax, +6% Holding Taxes, …
2. Panemones350 gold1825 d——+1.15/month Tax, +10% Holding Taxes, …
3. Rotating Wind Sails485 gold1825 d——+1.6/month Tax, +14% Holding Taxes, …
4. Windmill Water Wheels725 gold1825 d——+2.05/month Tax, +18% Holding Taxes, …
5. Horizontal Windmills1,100 gold1825 d——+2.5/month Tax, +22% Holding Taxes, …
6. Post Mills1,640 gold1825 d——+2.95/month Tax, +26% Holding Taxes, …
7. Gearboxes2,375 gold1825 d——+3.4/month Tax, +30% Holding Taxes, …
8. Tower Mills3,335 gold1825 d——+3.85/month Tax, +34% Holding Taxes, …

Level 1: Simple Windmills

Province

Key
windmills_01
Cost
200 gold
Construction
1,825 days (5 yrs)
Needs
castle, city or temple level 1
Terrain (one of)
Farmlands, Plains, Hills, Coastal

Level 2: Panemones

Province

Key
windmills_02
Cost
350 gold
Construction
1,825 days (5 yrs)
Needs
castle, city or temple level 1
Terrain (one of)
Farmlands, Plains, Hills, Coastal

Level 3: Rotating Wind Sails

Province

Key
windmills_03
Cost
485 gold
Construction
1,825 days (5 yrs)
Terrain (one of)
Farmlands, Plains, Hills, Coastal

Level 4: Windmill Water Wheels

Province

Key
windmills_04
Cost
725 gold
Construction
1,825 days (5 yrs)
Needs
castle, city or temple level 2
Terrain (one of)
Farmlands, Plains, Hills, Coastal

Level 5: Horizontal Windmills

Province

Key
windmills_05
Cost
1,100 gold
Construction
1,825 days (5 yrs)
Needs
castle, city or temple level 2
Innovation
Windmills
Terrain (one of)
Farmlands, Plains, Hills, Coastal

Level 6: Post Mills

Province

Key
windmills_06
Cost
1,640 gold
Construction
1,825 days (5 yrs)
Needs
castle, city or temple level 2
Innovation
Cranes, Windmills
Terrain (one of)
Farmlands, Plains, Hills, Coastal

Level 7: Gearboxes

Province

Key
windmills_07
Cost
2,375 gold
Construction
1,825 days (5 yrs)
Needs
castle, city or temple level 3
Innovation
Cranes, Windmills
Terrain (one of)
Farmlands, Plains, Hills, Coastal

Level 8: Tower Mills

Province

Key
windmills_08
Cost
3,335 gold
Construction
1,825 days (5 yrs)
Needs
castle, city or temple level 3
Innovation
Cranes, Windmills
Terrain (one of)
Farmlands, Plains, Hills, Coastal

Source: game/common/buildings/00_standard_economy_buildings.txt, game/common/holdings/00_holdings.txt, game/common/script_values/00_building_values.txt and the English localisation, Crusader Kings III 1.20.0.3.