diff --git a/src/Ext/Building/Body.cpp b/src/Ext/Building/Body.cpp
index feeeb6ba71..2d4df2e4fe 100644
--- a/src/Ext/Building/Body.cpp
+++ b/src/Ext/Building/Body.cpp
@@ -1,4 +1,5 @@
 #include "Body.h"
+#include "Ext/House/Body.h"
 
 #include <BitFont.h>
 
@@ -339,6 +340,19 @@ bool BuildingExt::ExtData::HandleInfiltrate(HouseClass* pInfiltratorHouse, int m
 		idx = this->TypeExtData->SpyEffect_InfiltratorSuperWeapon;
 		if (idx >= 0)
 			launchTheSWHere(pInfiltratorHouse->Supers.Items[idx], pInfiltratorHouse);
+
+		auto jamTime = this->TypeExtData->SpyEffect_RadarJamDuration;
+
+		if (jamTime > 0)
+		{
+			pVictimHouse->RecheckRadar = true;
+			auto pVictimExt = HouseExt::ExtMap.Find(pVictimHouse);
+			if (pVictimExt->SpyEffect_RadarJamTimer.TimeLeft < jamTime)
+			{
+				pVictimExt->SpyEffect_RadarJamTimer.Stop();
+				pVictimExt->SpyEffect_RadarJamTimer.Start(jamTime);
+			}
+		}
 	}
 
 	return true;
diff --git a/src/Ext/BuildingType/Body.cpp b/src/Ext/BuildingType/Body.cpp
index 46b6673df7..6adaf10005 100644
--- a/src/Ext/BuildingType/Body.cpp
+++ b/src/Ext/BuildingType/Body.cpp
@@ -914,6 +914,7 @@ void BuildingTypeExt::ExtData::LoadFromINIFile(CCINIClass* const pINI)
 		this->SpyEffect_VictimSuperWeapon.Read(exINI, pSection, "SpyEffect.VictimSuperWeapon");
 		this->SpyEffect_InfiltratorSuperWeapon.Read(exINI, pSection, "SpyEffect.InfiltratorSuperWeapon");
 	}
+	this->SpyEffect_RadarJamDuration.Read(exINI, pSection, "SpyEffect.RadarJamDuration");
 
 	if (pThis->MaxNumberOccupants > 10)
 	{
@@ -993,6 +994,7 @@ void BuildingTypeExt::ExtData::Serialize(T& Stm)
 		.Process(this->SpyEffect_Custom)
 		.Process(this->SpyEffect_VictimSuperWeapon)
 		.Process(this->SpyEffect_InfiltratorSuperWeapon)
+		.Process(this->SpyEffect_RadarJamDuration)
 		.Process(this->ConsideredVehicle)
 		.Process(this->ZShapePointMove_OnBuildup)
 		.Process(this->SellBuildupLength)
diff --git a/src/Ext/BuildingType/Body.h b/src/Ext/BuildingType/Body.h
index 977cd53023..1e1a8604d5 100644
--- a/src/Ext/BuildingType/Body.h
+++ b/src/Ext/BuildingType/Body.h
@@ -59,6 +59,7 @@ class BuildingTypeExt
 		Valueable<bool> SpyEffect_Custom;
 		ValueableIdx<SuperWeaponTypeClass> SpyEffect_VictimSuperWeapon;
 		ValueableIdx<SuperWeaponTypeClass> SpyEffect_InfiltratorSuperWeapon;
+		Valueable<int> SpyEffect_RadarJamDuration;
 
 		Nullable<bool> ConsideredVehicle;
 		Valueable<bool> ZShapePointMove_OnBuildup;
@@ -124,6 +125,7 @@ class BuildingTypeExt
 			, SpyEffect_Custom { false }
 			, SpyEffect_VictimSuperWeapon {}
 			, SpyEffect_InfiltratorSuperWeapon {}
+			, SpyEffect_RadarJamDuration { 0 }
 			, ConsideredVehicle {}
 			, ZShapePointMove_OnBuildup { false }
 			, SellBuildupLength { 23 }
diff --git a/src/Ext/House/Body.cpp b/src/Ext/House/Body.cpp
index 8f928902a0..a39d710c8a 100644
--- a/src/Ext/House/Body.cpp
+++ b/src/Ext/House/Body.cpp
@@ -636,6 +636,7 @@ void HouseExt::ExtData::Serialize(T& Stm)
 		.Process(this->AIFireSaleDelayTimer)
 		.Process(this->SuspendedEMPulseSWs)
 		.Process(this->SuperExts)
+		.Process(this->SpyEffect_RadarJamTimer)
 		;
 }
 
diff --git a/src/Ext/House/Body.h b/src/Ext/House/Body.h
index b6c0f21c2d..f72e98a744 100644
--- a/src/Ext/House/Body.h
+++ b/src/Ext/House/Body.h
@@ -70,6 +70,8 @@ class HouseExt
 		};
 		std::vector<SWExt> SuperExts;
 
+		CDTimerClass SpyEffect_RadarJamTimer;
+
 		ExtData(HouseClass* OwnerObject) : Extension<HouseClass>(OwnerObject)
 			, PowerPlantEnhancers {}
 			, OwnedLimboDeliveredBuildings {}
@@ -102,6 +104,7 @@ class HouseExt
 			, AIFireSaleDelayTimer {}
 			, SuspendedEMPulseSWs {}
 			, SuperExts(SuperWeaponTypeClass::Array->Count)
+			, SpyEffect_RadarJamTimer {}
 		{ }
 
 		bool OwnsLimboDeliveredBuilding(BuildingClass* pBuilding);
diff --git a/src/Ext/House/Hooks.cpp b/src/Ext/House/Hooks.cpp
index 4c5dbdb9fb..6f37b05754 100644
--- a/src/Ext/House/Hooks.cpp
+++ b/src/Ext/House/Hooks.cpp
@@ -413,6 +413,43 @@ DEFINE_HOOK(0x4FD8F7, HouseClass_UpdateAI_OnLastLegs, 0x10)
 	return ret;
 }
 
+namespace SpyEffectRadarJamContext
+{
+	HouseClass* pThis;
+}
+
+DEFINE_HOOK(0x4F8440, HouseCLass_Update_SpyEffectRadarJam, 0x5)
+{
+	GET(HouseClass*, pThis, ECX);
+
+	auto pExt = HouseExt::ExtMap.Find(pThis);
+
+	int StartTime = pExt->SpyEffect_RadarJamTimer.StartTime;
+	int TimeLeft = pExt->SpyEffect_RadarJamTimer.TimeLeft;
+
+	if (StartTime != -1 && Unsorted::CurrentFrame - StartTime == TimeLeft)
+	{
+		pExt->SpyEffect_RadarJamTimer.Stop();
+		pThis->RecheckRadar = true;
+	}
+
+	return 0;
+}
+
+DEFINE_HOOK(0x508DF0, HouseClass_UpdateRadar_SetContext, 0x7)
+{
+	GET(HouseClass*, pThis, ECX);
+	SpyEffectRadarJamContext::pThis = pThis;
+	return 0;
+}
+
+DEFINE_HOOK(0x508F2A, HouseClass_UpdateRadar_CheckSpyEffectRadarJam, 0x5)
+{
+	enum { RadarUnavailable = 0x508F2F };
+	auto const pExt = HouseExt::ExtMap.Find(SpyEffectRadarJamContext::pThis);
+	return pExt->SpyEffect_RadarJamTimer.IsTicking() ? RadarUnavailable : 0;
+}
+
 // WW's code set anger on every houses, even on the allies.
 DEFINE_HOOK(0x4FD616, HouseClass_sub4FD500_DontAngerOnAlly, 0x9)
 {