diff --git a/src/data/buildings.ts b/src/data/buildings.ts
index 45b333a..66d1140 100644
--- a/src/data/buildings.ts
+++ b/src/data/buildings.ts
@@ -47,6 +47,7 @@ export default [
                     'food': 100,
                 }
             },
+            constructionTimeReductionPerLevel: 0.025,
         },
     },
     {
diff --git a/src/logic.ts b/src/logic.ts
new file mode 100644
index 0000000..d77f587
--- /dev/null
+++ b/src/logic.ts
@@ -0,0 +1,14 @@
+import type { BuildingSource } from "./types";
+import type { VillageState } from "./village";
+
+
+export function getTimeToBuild(V: VillageState, building: BuildingSource, level: number): number {
+    const townhall = V.buildings.find(b => b.type === 'townhall');
+    if (!townhall) {
+        throw new Error("Unable to find the Town hall");
+    }
+
+    const reduction = townhall.level * (townhall.behavior.constructionTimeReductionPerLevel || 0);
+    const baseBuildingTime = building.timeToBuild(level) * 1000;
+    return baseBuildingTime - (baseBuildingTime * reduction);
+}
diff --git a/src/moves/build.ts b/src/moves/build.ts
index d4a7083..16d3d67 100644
--- a/src/moves/build.ts
+++ b/src/moves/build.ts
@@ -1,5 +1,6 @@
 import { createBuilding, getBuildingSource } from "../create";
 import type { Hex } from "../hexgrid";
+import { getTimeToBuild } from "../logic";
 import { DEFAULT_TILE, type VillageState } from "../village";
 
 
@@ -29,7 +30,7 @@ export default function build(V: VillageState, buildingType: string, tile: Hex)
     newBuilding.tile = tile;
     newBuilding.level = 0;
     newBuilding.state.upgrade.isUpgrading = true;
-    newBuilding.state.upgrade.remainingTime = 1000 * newBuilding.timeToBuild(newBuilding.level + 1);
+    newBuilding.state.upgrade.remainingTime = getTimeToBuild(V, building, 1);
 
     V.buildings.push(newBuilding);
     V.villageTiles[tile.y][tile.x] = newBuilding.id;
diff --git a/src/moves/upgradeBuilding.ts b/src/moves/upgradeBuilding.ts
index 225563e..6fd945b 100644
--- a/src/moves/upgradeBuilding.ts
+++ b/src/moves/upgradeBuilding.ts
@@ -1,3 +1,4 @@
+import { getTimeToBuild } from "../logic";
 import { canPayBuildingCost, getBuildingUpgradeCost } from "../utils";
 import type { VillageState } from "../village";
 
@@ -28,7 +29,7 @@ export default function upgradeBuilding(V: VillageState, buildingId: number) {
     V.resources.food -= cost.food;
 
     building.state.upgrade.isUpgrading = true;
-    building.state.upgrade.remainingTime = 1000 * building.timeToBuild(building.level + 1);
+    building.state.upgrade.remainingTime = getTimeToBuild(V, building, building.level + 1);
 
     return true;
 }
diff --git a/src/types.ts b/src/types.ts
index 3545510..5a862b9 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -34,6 +34,7 @@ export interface BuildingSource {
             type: string;
             recruitmentTime: Function;
         };
+        constructionTimeReductionPerLevel?: number;
     };
 }