diff --git a/src/sectionproperties/pre/geometry.py b/src/sectionproperties/pre/geometry.py
index c0a61b33..bdae94d3 100644
--- a/src/sectionproperties/pre/geometry.py
+++ b/src/sectionproperties/pre/geometry.py
@@ -2510,17 +2510,22 @@ def load_dxf(
     my_dxf.process(spline_delta=spline_delta, degrees_per_segment=degrees_per_segment)
     my_dxf.cleanup()
 
-    polygons = my_dxf.polygons
-    new_polygons = c2s.utils.find_holes(polygons)
-
-    if isinstance(new_polygons, MultiPolygon):
-        return CompoundGeometry(new_polygons)
-    elif isinstance(new_polygons, Polygon):  # pyright: ignore [reportUnnecessaryIsInstance]
-        return Geometry(new_polygons)
-    else:
+    # ensure list length > 0
+    if len(new_polygons) == 0:
         msg = f"No shapely.Polygon objects found in file: {dxf_filepath}"
         raise RuntimeError(msg)
 
+    # ensure only Polygons are generated
+    for poly in new_polygons:
+        if not isinstance(poly, Polygon):  # pyright: ignore [reportUnnecessaryIsInstance]
+            msg = f"Not all objects found in file: {dxf_filepath} are Polygons"
+            raise RuntimeError(msg)
+
+    if len(new_polygons) == 1:
+        return Geometry(new_polygons[0])
+    else:
+        return CompoundGeometry(MultiPolygon(new_polygons))
+
 
 def create_facets(
     points_list: list[tuple[float, float]],
diff --git a/typings/cad_to_shapely/__init__.pyi b/typings/cad_to_shapely/__init__.pyi
index 87797693..082a9fb5 100644
--- a/typings/cad_to_shapely/__init__.pyi
+++ b/typings/cad_to_shapely/__init__.pyi
@@ -1,2 +1,2 @@
 from .dxf import DxfImporter
-from .utils import find_holes
+from .utils import filter_polygons, find_holes
\ No newline at end of file
diff --git a/typings/cad_to_shapely/utils.pyi b/typings/cad_to_shapely/utils.pyi
index f61ebec0..7254214c 100644
--- a/typings/cad_to_shapely/utils.pyi
+++ b/typings/cad_to_shapely/utils.pyi
@@ -1,3 +1,7 @@
 from shapely.geometry import Polygon
 
 def find_holes(polygons: list[Polygon]) -> Polygon: ...
+def filter_polygons(
+    polygons: list[Polygon],
+    filter_flag: int = ...,
+) -> list[Polygon]: ...
\ No newline at end of file
diff --git a/uv.lock b/uv.lock
index 0860c55f..6a6fb78e 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1646,6 +1646,7 @@ version = "2.5.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "pytest" },
+    { name = "typing-extensions", marker = "python_full_version < '3.11'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/ce/d7/32de906d890e3ccdad421b6db2a67ff94ebecb1f933e5f1038b69f007c30/pytest_check-2.5.0.tar.gz", hash = "sha256:3a6be8431c7720287958436d97a6b823eed5ae5ceb7da5572a0e4a9462feaf88", size = 26844 }
 wheels = [