diff --git a/core/src/com/unciv/logic/map/mapunit/UnitTurnManager.kt b/core/src/com/unciv/logic/map/mapunit/UnitTurnManager.kt
index 2796f05d98..10de611b77 100644
--- a/core/src/com/unciv/logic/map/mapunit/UnitTurnManager.kt
+++ b/core/src/com/unciv/logic/map/mapunit/UnitTurnManager.kt
@@ -170,7 +170,7 @@ class UnitTurnManager(val unit: MapUnit) {
             UncivGame.Current.settings.addCompletedTutorialTask("Construct an improvement")
 
         val improvementInProgress = tile.improvementInProgress ?: return
-        tile.changeImprovement(improvementInProgress, unit.civ)
+        tile.changeImprovement(improvementInProgress, unit.civ, unit)
 
         tile.improvementInProgress = null
         tile.getCity()?.updateCitizens = true
diff --git a/core/src/com/unciv/logic/map/tile/Tile.kt b/core/src/com/unciv/logic/map/tile/Tile.kt
index 3e96ff8d87..0cbd5d3f60 100644
--- a/core/src/com/unciv/logic/map/tile/Tile.kt
+++ b/core/src/com/unciv/logic/map/tile/Tile.kt
@@ -306,8 +306,8 @@ open class Tile : IsPartOfGameInfoSerialization {
     fun removeImprovement() =
         improvementFunctions.changeImprovement(null)
 
-    fun changeImprovement(improvementStr: String, civToHandleCompletion:Civilization? = null) =
-        improvementFunctions.changeImprovement(improvementStr, civToHandleCompletion)
+    fun changeImprovement(improvementStr: String, civToHandleCompletion: Civilization? = null, unit: MapUnit? = null) =
+        improvementFunctions.changeImprovement(improvementStr, civToHandleCompletion, unit)
 
     // function handling when adding a road to the tile
     fun addRoad(roadType: RoadStatus, creatingCivInfo: Civilization?) {
diff --git a/core/src/com/unciv/logic/map/tile/TileInfoImprovementFunctions.kt b/core/src/com/unciv/logic/map/tile/TileInfoImprovementFunctions.kt
index 594ecd8a82..ecfd949a44 100644
--- a/core/src/com/unciv/logic/map/tile/TileInfoImprovementFunctions.kt
+++ b/core/src/com/unciv/logic/map/tile/TileInfoImprovementFunctions.kt
@@ -6,8 +6,10 @@ import com.unciv.logic.civilization.LocationAction
 import com.unciv.logic.civilization.NotificationCategory
 import com.unciv.logic.civilization.NotificationIcon
 import com.unciv.logic.civilization.diplomacy.DiplomaticModifiers
+import com.unciv.logic.map.mapunit.MapUnit
 import com.unciv.models.ruleset.tile.TileImprovement
 import com.unciv.models.ruleset.unique.StateForConditionals
+import com.unciv.models.ruleset.unique.UniqueTriggerActivation
 import com.unciv.models.ruleset.unique.UniqueType
 
 
@@ -187,7 +189,7 @@ class TileInfoImprovementFunctions(val tile: Tile) {
 
     fun changeImprovement(improvementName: String?,
                           /** For road assignment and taking over tiles - DO NOT pass when simulating improvement effects! */
-                          civToActivateBroaderEffects:Civilization? = null) {
+                          civToActivateBroaderEffects: Civilization? = null, unit: MapUnit? = null) {
         val improvementObject = tile.ruleset.tileImprovements[improvementName]
 
         when {
@@ -223,6 +225,9 @@ class TileInfoImprovementFunctions(val tile: Tile) {
         )
             takeOverTilesAround(civToActivateBroaderEffects, tile)
 
+        if (civToActivateBroaderEffects != null && improvementObject != null)
+            triggerImprovementUniques(improvementObject, civToActivateBroaderEffects, unit)
+
         val city = tile.owningCity
         if (city != null) {
             city.cityStats.update()
@@ -233,6 +238,29 @@ class TileInfoImprovementFunctions(val tile: Tile) {
         }
     }
 
+    private fun triggerImprovementUniques(
+        improvement: TileImprovement,
+        civ: Civilization,
+        unit: MapUnit? = null
+    ) {
+        for (unique in improvement.uniqueObjects.filter { !it.hasTriggerConditional() })
+            if (unit != null) {
+                UniqueTriggerActivation.triggerUnitwideUnique(unique, unit)
+            }
+            else UniqueTriggerActivation.triggerCivwideUnique(unique, civ, tile = tile)
+
+        if (unit != null){
+            for (unique in unit.getTriggeredUniques(UniqueType.TriggerUponBuildingImprovement)
+                .filter { improvement.matchesFilter(it.params[0]) })
+                UniqueTriggerActivation.triggerUnitwideUnique(unique, unit)
+            }
+
+        for (unique in civ.getMatchingUniques(
+            UniqueType.TriggerUponBuildingImprovement, StateForConditionals(civInfo = civ, unit = unit))
+            .filter { improvement.matchesFilter(it.params[0]) })
+            UniqueTriggerActivation.triggerCivwideUnique(unique, civ, tile = tile)
+    }
+
     private fun adtivateRemovalImprovement(
         improvementName: String,
         civToActivateBroaderEffects: Civilization?
diff --git a/core/src/com/unciv/models/ruleset/unique/UniqueTarget.kt b/core/src/com/unciv/models/ruleset/unique/UniqueTarget.kt
index 2c8602e334..8ddb74a03b 100644
--- a/core/src/com/unciv/models/ruleset/unique/UniqueTarget.kt
+++ b/core/src/com/unciv/models/ruleset/unique/UniqueTarget.kt
@@ -48,7 +48,7 @@ enum class UniqueTarget(
 
     // Tile-specific
     Terrain,
-    Improvement,
+    Improvement(inheritsFrom = Triggerable),
     Resource(inheritsFrom = Global),
     Ruins(inheritsFrom = UnitTriggerable),
 
diff --git a/core/src/com/unciv/models/ruleset/unique/UniqueType.kt b/core/src/com/unciv/models/ruleset/unique/UniqueType.kt
index 9f988b0b40..9682b343fe 100644
--- a/core/src/com/unciv/models/ruleset/unique/UniqueType.kt
+++ b/core/src/com/unciv/models/ruleset/unique/UniqueType.kt
@@ -756,6 +756,7 @@ enum class UniqueType(
     /** Can be placed upon both units and as global */
     TriggerUponConqueringCity("upon conquering a city", UniqueTarget.TriggerCondition, UniqueTarget.UnitTriggerCondition),
     TriggerUponFoundingCity("upon founding a city", UniqueTarget.TriggerCondition),
+    TriggerUponBuildingImprovement("upon building a [improvementFilter] improvement", UniqueTarget.TriggerCondition, UniqueTarget.UnitTriggerCondition),
     TriggerUponDiscoveringNaturalWonder("upon discovering a Natural Wonder", UniqueTarget.TriggerCondition),
     TriggerUponConstructingBuilding("upon constructing [buildingFilter]", UniqueTarget.TriggerCondition),
     // We have a separate trigger to include the cityFilter, since '[in all cities]' can be read '*only* if it's in all cities'
diff --git a/core/src/com/unciv/ui/screens/worldscreen/unit/actions/UnitActionsFromUniques.kt b/core/src/com/unciv/ui/screens/worldscreen/unit/actions/UnitActionsFromUniques.kt
index fab7e1c010..42290a6eff 100644
--- a/core/src/com/unciv/ui/screens/worldscreen/unit/actions/UnitActionsFromUniques.kt
+++ b/core/src/com/unciv/ui/screens/worldscreen/unit/actions/UnitActionsFromUniques.kt
@@ -40,7 +40,7 @@ object UnitActionsFromUniques {
 
         return UnitAction(UnitActionType.Create, "Create [$improvementName]",
             action = {
-                tile.changeImprovement(improvementName, unit.civ)
+                tile.changeImprovement(improvementName, unit.civ, unit)
                 unit.destroy()  // Modders may wish for a nondestructive way, but that should be another Unique
             }.takeIf { unit.currentMovement > 0 })
     }
@@ -255,7 +255,7 @@ object UnitActionsFromUniques {
                 ),
                 action = {
                     val unitTile = unit.getTile()
-                    unitTile.changeImprovement(improvementName, unit.civ)
+                    unitTile.changeImprovement(improvementName, unit.civ, unit)
 
                     // without this the world screen won't show the improvement because it isn't the 'last seen improvement'
                     unit.civ.cache.updateViewableTiles()