diff --git a/src/bonsai/bonsai/core/pset.py b/src/bonsai/bonsai/core/pset.py
index 62517b7ab2..04df419e68 100644
--- a/src/bonsai/bonsai/core/pset.py
+++ b/src/bonsai/bonsai/core/pset.py
@@ -40,7 +40,11 @@ def copy_property_to_selection(
     element = ifc.get_entity(obj)
     if not element:
         return
-    ifc_pset = pset.get_element_pset(element, pset_name)
+    # Only consider the element's own property set, never one inherited from its
+    # type. Otherwise copying an occurrence override would edit the type's pset
+    # (and thus every occurrence) instead of creating/updating the override on
+    # this element. See https://github.com/IfcOpenShell/IfcOpenShell/issues/7412.
+    ifc_pset = pset.get_element_pset(element, pset_name, should_inherit=False)
     if not ifc_pset:
         ifc_pset = ifc.run("pset.add_pset" if is_pset else "pset.add_qto", product=element, name=pset_name)
     if is_pset:
diff --git a/src/bonsai/bonsai/core/tool.py b/src/bonsai/bonsai/core/tool.py
index 7056e5ec34..7448616ce7 100644
--- a/src/bonsai/bonsai/core/tool.py
+++ b/src/bonsai/bonsai/core/tool.py
@@ -814,7 +814,7 @@ class Pset:
     def cast_string_to_primitive(cls, value: str): pass
     def clear_blender_pset_properties(cls, props): pass
     def enable_proposed_pset(cls, props, pset_name, pset_type, has_template): pass
-    def get_element_pset(cls, element, pset_name): pass
+    def get_element_pset(cls, element, pset_name, should_inherit=True): pass
     def get_prop_template_primitive_type(cls, prop_template): pass
     def get_pset_name(cls, obj, obj_type, pset_type): pass
     def get_pset_template(cls, name): pass
diff --git a/src/bonsai/bonsai/tool/pset.py b/src/bonsai/bonsai/tool/pset.py
index aa72a85e6f..c26677fee7 100644
--- a/src/bonsai/bonsai/tool/pset.py
+++ b/src/bonsai/bonsai/tool/pset.py
@@ -70,9 +70,9 @@ class Pset(bonsai.core.tool.Pset):
 
     @classmethod
     def get_element_pset(
-        cls, element: ifcopenshell.entity_instance, pset_name: str
+        cls, element: ifcopenshell.entity_instance, pset_name: str, should_inherit: bool = True
     ) -> Union[ifcopenshell.entity_instance, None]:
-        pset = ifcopenshell.util.element.get_pset(element, pset_name)
+        pset = ifcopenshell.util.element.get_pset(element, pset_name, should_inherit=should_inherit)
         if pset:
             return tool.Ifc.get().by_id(pset["id"])
 
diff --git a/src/bonsai/test/core/test_pset.py b/src/bonsai/test/core/test_pset.py
index 9ebf82bb8d..e96e432196 100644
--- a/src/bonsai/test/core/test_pset.py
+++ b/src/bonsai/test/core/test_pset.py
@@ -29,7 +29,7 @@ class TestCopyPropertyToSelection:
 
     def test_copying_the_property_to_an_existing_pset(self, ifc, pset):
         ifc.get_entity("obj").should_be_called().will_return("element")
-        pset.get_element_pset("element", "pset_name").should_be_called().will_return("pset")
+        pset.get_element_pset("element", "pset_name", should_inherit=False).should_be_called().will_return("pset")
         ifc.run("pset.edit_pset", pset="pset", properties={"prop_name": "prop_value"}).should_be_called()
         subject.copy_property_to_selection(
             ifc, pset, is_pset=True, obj="obj", pset_name="pset_name", prop_name="prop_name", prop_value="prop_value"
@@ -37,7 +37,7 @@ class TestCopyPropertyToSelection:
 
     def test_creating_a_new_pset_if_it_doesnt_exist(self, ifc, pset):
         ifc.get_entity("obj").should_be_called().will_return("element")
-        pset.get_element_pset("element", "pset_name").should_be_called().will_return(None)
+        pset.get_element_pset("element", "pset_name", should_inherit=False).should_be_called().will_return(None)
         ifc.run("pset.add_pset", product="element", name="pset_name").should_be_called().will_return("pset")
         ifc.run("pset.edit_pset", pset="pset", properties={"prop_name": "prop_value"}).should_be_called()
         subject.copy_property_to_selection(
@@ -46,7 +46,7 @@ class TestCopyPropertyToSelection:
 
     def test_copying_the_quantity_to_an_existing_qto(self, ifc, pset):
         ifc.get_entity("obj").should_be_called().will_return("element")
-        pset.get_element_pset("element", "qto_name").should_be_called().will_return("qto")
+        pset.get_element_pset("element", "qto_name", should_inherit=False).should_be_called().will_return("qto")
         ifc.run("pset.edit_qto", qto="qto", properties={"prop_name": "prop_value"}).should_be_called()
         subject.copy_property_to_selection(
             ifc, pset, is_pset=False, obj="obj", pset_name="qto_name", prop_name="prop_name", prop_value="prop_value"
@@ -54,7 +54,7 @@ class TestCopyPropertyToSelection:
 
     def test_creating_a_new_qto_if_it_doesnt_exist(self, ifc, pset):
         ifc.get_entity("obj").should_be_called().will_return("element")
-        pset.get_element_pset("element", "qto_name").should_be_called().will_return(None)
+        pset.get_element_pset("element", "qto_name", should_inherit=False).should_be_called().will_return(None)
         ifc.run("pset.add_qto", product="element", name="qto_name").should_be_called().will_return("qto")
         ifc.run("pset.edit_qto", qto="qto", properties={"prop_name": "prop_value"}).should_be_called()
         subject.copy_property_to_selection(