diff --git a/include/iselection.h b/include/iselection.h
index 9a9a5880..a5e78b99 100644
--- a/include/iselection.h
+++ b/include/iselection.h
@@ -56,6 +56,8 @@ template<typename Element> class BasicVector4;
 typedef BasicVector4<float> Vector4;
 typedef Vector4 Quaternion;
 
+class AABB;
+
 typedef Callback1<const Selectable&> SelectionChangeCallback;
 typedef SignalHandler1<const Selectable&> SelectionChangeHandler;
 
@@ -127,6 +129,8 @@ virtual void scaleSelected( const Vector3& scaling, bool snapOrigin = false ) =
 
 virtual void pivotChanged() const = 0;
 virtual void setCustomTransformOrigin( const Vector3& origin, const bool set[3] ) const = 0;
+
+virtual const AABB& getBoundsSelected() const = 0; /* object bounds */
 };
 
 #include "modulesystem.h"
diff --git a/radiant/select.cpp b/radiant/select.cpp
index 81190297..457b61d0 100644
--- a/radiant/select.cpp
+++ b/radiant/select.cpp
@@ -42,7 +42,6 @@
 #include "patch.h"
 #include "patchmanip.h"
 #include "patchdialog.h"
-#include "selection.h"
 #include "texwindow.h"
 #include "gtkmisc.h"
 #include "mainframe.h"
@@ -535,16 +534,13 @@ void Select_SetFlags( const ContentsFlagsValue& flags ){
 }
 
 void Select_GetBounds( Vector3& mins, Vector3& maxs ){
-	AABB bounds;
-	Scene_BoundsSelected( GlobalSceneGraph(), bounds );
+	const AABB bounds = GlobalSelectionSystem().getBoundsSelected();
 	maxs = vector3_added( bounds.origin, bounds.extents );
 	mins = vector3_subtracted( bounds.origin, bounds.extents );
 }
 
 void Select_GetMid( Vector3& mid ){
-	AABB bounds;
-	Scene_BoundsSelected( GlobalSceneGraph(), bounds );
-	mid = vector3_snapped( bounds.origin );
+	mid = vector3_snapped( GlobalSelectionSystem().getBoundsSelected().origin );
 }
 
 
diff --git a/radiant/selection.cpp b/radiant/selection.cpp
index 91266254..92f3c216 100644
--- a/radiant/selection.cpp
+++ b/radiant/selection.cpp
@@ -4261,6 +4261,26 @@ void Scene_SelectAll_Component( bool select, SelectionSystem::EComponentMode com
 	GlobalSceneGraph().traverse( select_all_component( select, componentMode ) );
 }
 
+void Scene_BoundsSelected( scene::Graph& graph, AABB& bounds );
+class LazyBounds
+{
+	AABB m_bounds;
+	bool m_valid;
+public:
+	LazyBounds() : m_valid( false ){
+	}
+	void setInvalid(){
+		m_valid = false;
+	}
+	const AABB& getBounds(){
+		if( !m_valid ){
+			Scene_BoundsSelected( GlobalSceneGraph(), m_bounds );
+			m_valid = true;
+		}
+		return m_bounds;
+	}
+};
+
 
 // RadiantSelectionSystem
 class RadiantSelectionSystem :
@@ -4274,6 +4294,7 @@ class RadiantSelectionSystem :
 {
 mutable Matrix4 m_pivot2world;
 mutable AABB m_bounds;
+mutable LazyBounds m_lazy_bounds;
 Matrix4 m_pivot2world_start;
 Matrix4 m_manip2pivot_start;
 Translation m_translation;
@@ -4359,6 +4380,7 @@ RadiantSelectionSystem() :
 }
 void pivotChanged() const {
 	m_pivotChanged = true;
+	m_lazy_bounds.setInvalid();
 	SceneChangeNotify();
 }
 typedef ConstMemberCaller<RadiantSelectionSystem, &RadiantSelectionSystem::pivotChanged> PivotChangedCaller;
@@ -4367,6 +4389,10 @@ void pivotChangedSelection( const Selectable& selectable ){
 }
 typedef MemberCaller1<RadiantSelectionSystem, const Selectable&, &RadiantSelectionSystem::pivotChangedSelection> PivotChangedSelectionCaller;
 
+const AABB& getBoundsSelected() const {
+	return m_lazy_bounds.getBounds();
+}
+
 void SetMode( EMode mode ){
 	if ( m_mode != mode ) {
 		m_mode = mode;
@@ -5417,11 +5443,11 @@ AABB RadiantSelectionSystem::getSelectionAABB() const {
 		if ( Mode() == eComponent || g_bTmpComponentMode ) {
 			Scene_BoundsSelectedComponent( GlobalSceneGraph(), bounds );
 			if( !aabb_valid( bounds ) ) /* selecting PlaneSelectables sets g_bTmpComponentMode, but only brushes return correct componentEditable->getSelectedComponentsBounds() */
-				Scene_BoundsSelected( GlobalSceneGraph(), bounds );
+				bounds = getBoundsSelected();
 		}
 		else
 		{
-			Scene_BoundsSelected( GlobalSceneGraph(), bounds );
+			bounds = getBoundsSelected();
 		}
 	}
 	return bounds;
diff --git a/radiant/selection.h b/radiant/selection.h
index 01c7d599..1e5294c9 100644
--- a/radiant/selection.h
+++ b/radiant/selection.h
@@ -40,11 +40,4 @@ virtual void incMouseMove( const WindowVector& delta ) = 0;
 
 SelectionSystemWindowObserver* NewWindowObserver();
 
-class AABB;
-namespace scene
-{
-class Graph;
-}
-void Scene_BoundsSelected( scene::Graph& graph, AABB& bounds );
-
 #endif
diff --git a/radiant/xywindow.cpp b/radiant/xywindow.cpp
index 0ea69865..680e0773 100644
--- a/radiant/xywindow.cpp
+++ b/radiant/xywindow.cpp
@@ -2545,7 +2545,7 @@ void XY_Centralize(){
 
 void GetSelectionBbox( AABB& bounds ){
 	if ( GlobalSelectionSystem().countSelected() != 0 ) {
-		Scene_BoundsSelected( GlobalSceneGraph(), bounds );
+		bounds = GlobalSelectionSystem().getBoundsSelected();
 	}
 	else
 	{