diff --git a/src/ifcopenshell-python/ifcopenshell/util/selector.py b/src/ifcopenshell-python/ifcopenshell/util/selector.py
index da86b69a91..40edf5199b 100644
--- a/src/ifcopenshell-python/ifcopenshell/util/selector.py
+++ b/src/ifcopenshell-python/ifcopenshell/util/selector.py
@@ -540,8 +540,15 @@ def _get_element_value(element: ifcopenshell.entity_instance, keys: list[str]) -
                 value = results or None
                 if value and len(value) == 1:
                     value = value[0]
+            elif key in value:
+                value = value[key]
             else:
-                value = value.get(key, None)
+                # A nested complex quantity/property (IfcPhysicalComplexQuantity /
+                # IfcComplexProperty) is represented as a dict whose nested members
+                # live under a "properties" sub-dict. Descend into it so that nested
+                # values are reachable with the natural "Qto.Complex.Nested" path.
+                subprops = value.get("properties")
+                value = subprops.get(key, None) if isinstance(subprops, dict) else None
         elif isinstance(value, (list, tuple, set)):  # If we use regex
             if isinstance(key, str) and key.isnumeric():
                 try:
diff --git a/src/ifcopenshell-python/test/util/test_selector.py b/src/ifcopenshell-python/test/util/test_selector.py
index af80141e81..c4c7a6ce17 100644
--- a/src/ifcopenshell-python/test/util/test_selector.py
+++ b/src/ifcopenshell-python/test/util/test_selector.py
@@ -195,6 +195,37 @@ class TestGetElementValue(test.bootstrap.IFC4):
         assert subject.get_element_value(element, "/Pset_.*Common/.Status") == ["New"]
         assert subject.get_element_value(element, "/Pset_.*Common/.Status.0") == "New"
 
+    def test_selecting_a_nested_complex_quantity(self):
+        element = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcWall")
+        complex_quantity = self.file.create_entity(
+            "IfcPhysicalComplexQuantity",
+            Name="Layer1",
+            Discrimination="layer",
+            HasQuantities=[
+                self.file.create_entity("IfcQuantityLength", Name="Width", LengthValue=0.1),
+                self.file.create_entity("IfcQuantityLength", Name="Height", LengthValue=2.5),
+            ],
+        )
+        quantity = self.file.create_entity(
+            "IfcElementQuantity",
+            GlobalId=ifcopenshell.guid.new(),
+            Name="Qto_Custom",
+            Quantities=[complex_quantity, self.file.create_entity("IfcQuantityArea", Name="NetArea", AreaValue=5.0)],
+        )
+        self.file.create_entity(
+            "IfcRelDefinesByProperties",
+            GlobalId=ifcopenshell.guid.new(),
+            RelatedObjects=[element],
+            RelatingPropertyDefinition=quantity,
+        )
+        # A simple quantity in the same set still resolves normally.
+        assert subject.get_element_value(element, "Qto_Custom.NetArea") == 5.0
+        # Nested quantities of a complex quantity are reachable with the natural path.
+        assert subject.get_element_value(element, "Qto_Custom.Layer1.Width") == 0.1
+        assert subject.get_element_value(element, "Qto_Custom.Layer1.Height") == 2.5
+        # The explicit "properties" path is preserved for backwards compatibility.
+        assert subject.get_element_value(element, "Qto_Custom.Layer1.properties.Width") == 0.1
+
 
 class TestFilterElements(test.bootstrap.IFC4):
     def test_selecting_by_globalid(self):