diff --git a/src/object/BannerObject.cpp b/src/object/BannerObject.cpp
index 9dfd40a799..c4cba5beaf 100644
--- a/src/object/BannerObject.cpp
+++ b/src/object/BannerObject.cpp
@@ -44,6 +44,12 @@ void BannerObject::ReadLegacy(IReadObjectContext * context, IStream * stream)
     _sceneryTabEntry = stream->ReadValue<rct_object_entry>();
 
     GetImageTable()->Read(context, stream);
+
+    // Validate properties
+    if (_legacyType.large_scenery.price <= 0)
+    {
+        context->LogError(OBJECT_ERROR_INVALID_PROPERTY, "Price can not be free or negative.");
+    }
 }
 
 void BannerObject::Load()
diff --git a/src/object/FootpathItemObject.cpp b/src/object/FootpathItemObject.cpp
index 3895133b2c..48f2916424 100644
--- a/src/object/FootpathItemObject.cpp
+++ b/src/object/FootpathItemObject.cpp
@@ -43,6 +43,12 @@ void FootpathItemObject::ReadLegacy(IReadObjectContext * context, IStream * stre
     _sceneryTabEntry = stream->ReadValue<rct_object_entry>();
 
     GetImageTable()->Read(context, stream);
+
+    // Validate properties
+    if (_legacyType.large_scenery.price <= 0)
+    {
+        context->LogError(OBJECT_ERROR_INVALID_PROPERTY, "Price can not be free or negative.");
+    }
 }
 
 void FootpathItemObject::Load()
diff --git a/src/object/FootpathObject.cpp b/src/object/FootpathObject.cpp
index 9d255830a5..2580f42f01 100644
--- a/src/object/FootpathObject.cpp
+++ b/src/object/FootpathObject.cpp
@@ -41,6 +41,12 @@ void FootpathObject::ReadLegacy(IReadObjectContext * context, IStream * stream)
 
     GetStringTable()->Read(context, stream, OBJ_STRING_ID_NAME);
     GetImageTable()->Read(context, stream);
+
+    // Validate properties
+    if (_legacyType.var_0A > 1)
+    {
+        context->LogError(OBJECT_ERROR_INVALID_PROPERTY, "VAR_0A can not be greater than 1.");
+    }
 }
 
 void FootpathObject::Load()
diff --git a/src/object/LargeSceneryObject.cpp b/src/object/LargeSceneryObject.cpp
index 2e16535fec..cefb6828da 100644
--- a/src/object/LargeSceneryObject.cpp
+++ b/src/object/LargeSceneryObject.cpp
@@ -63,6 +63,21 @@ void LargeSceneryObject::ReadLegacy(IReadObjectContext * context, IStream * stre
     _tiles = ReadTiles(stream);
 
     GetImageTable()->Read(context, stream);
+
+    // Validate properties
+    if (_legacyType.large_scenery.price <= 0)
+    {
+        context->LogError(OBJECT_ERROR_INVALID_PROPERTY, "Price can not be free or negative.");
+    }
+    if (_legacyType.large_scenery.removal_price <= 0)
+    {
+        // Make sure you don't make a profit when placing then removing.
+        money16 reimbursement = _legacyType.large_scenery.removal_price;
+        if (reimbursement > _legacyType.large_scenery.price)
+        {
+            context->LogError(OBJECT_ERROR_INVALID_PROPERTY, "Sell price can not be more than buy price.");
+        }
+    }
 }
 
 void LargeSceneryObject::Load()
diff --git a/src/object/RideObject.cpp b/src/object/RideObject.cpp
index e665026388..f09304c610 100644
--- a/src/object/RideObject.cpp
+++ b/src/object/RideObject.cpp
@@ -80,6 +80,20 @@ void RideObject::ReadLegacy(IReadObjectContext * context, IStream * stream)
     }
 
     GetImageTable()->Read(context, stream);
+
+    // Validate properties
+    if (_legacyType.excitement_multipler > 75)
+    {
+        context->LogError(OBJECT_ERROR_INVALID_PROPERTY, "Excitement multiplier too high.");
+    }
+    if (_legacyType.intensity_multipler > 75)
+    {
+        context->LogError(OBJECT_ERROR_INVALID_PROPERTY, "Intensity multiplier too high.");
+    }
+    if (_legacyType.nausea_multipler > 75)
+    {
+        context->LogError(OBJECT_ERROR_INVALID_PROPERTY, "Nausea multiplier too high.");
+    }
 }
 
 void RideObject::Load()
diff --git a/src/object/SmallSceneryObject.cpp b/src/object/SmallSceneryObject.cpp
index 34d3e6111d..13133cf1d2 100644
--- a/src/object/SmallSceneryObject.cpp
+++ b/src/object/SmallSceneryObject.cpp
@@ -61,6 +61,21 @@ void SmallSceneryObject::ReadLegacy(IReadObjectContext * context, IStream * stre
     }
 
     GetImageTable()->Read(context, stream);
+
+    // Validate properties
+    if (_legacyType.small_scenery.price <= 0)
+    {
+        context->LogError(OBJECT_ERROR_INVALID_PROPERTY, "Price can not be free or negative.");
+    }
+    if (_legacyType.small_scenery.removal_price <= 0)
+    {
+        // Make sure you don't make a profit when placing then removing.
+        money16 reimbursement = _legacyType.small_scenery.removal_price;
+        if (reimbursement > _legacyType.small_scenery.price)
+        {
+            context->LogError(OBJECT_ERROR_INVALID_PROPERTY, "Sell price can not be more than buy price.");
+        }
+    }
 }
 
 void SmallSceneryObject::Load()
diff --git a/src/object/WallObject.cpp b/src/object/WallObject.cpp
index 352af8d84c..1182551b5d 100644
--- a/src/object/WallObject.cpp
+++ b/src/object/WallObject.cpp
@@ -47,6 +47,12 @@ void WallObject::ReadLegacy(IReadObjectContext * context, IStream * stream)
     _sceneryTabEntry = stream->ReadValue<rct_object_entry>();
 
     GetImageTable()->Read(context, stream);
+
+    // Validate properties
+    if (_legacyType.large_scenery.price <= 0)
+    {
+        context->LogError(OBJECT_ERROR_INVALID_PROPERTY, "Price can not be free or negative.");
+    }
 }
 
 void WallObject::Load()