diff --git a/src/filters/boardgame_filters.py b/src/filters/boardgame_filters.py
new file mode 100644
index 0000000..4b60707
--- /dev/null
+++ b/src/filters/boardgame_filters.py
@@ -0,0 +1,21 @@
+from typing import Union
+
+from src.classes import boardgame_classes
+
+def filter_expansions_out(to_filter_boardgames: list[Union[
+    list[boardgame_classes.BoardGame], list[boardgame_classes.BoardGameExpansion],
+    list[boardgame_classes.OwnedBoardGame], list[boardgame_classes.OwnedBoardGameExpansion],
+    list[boardgame_classes.WishlistBoardGame], list[boardgame_classes.WishlistBoardGameExpansion]]]):
+    
+    filtered_boardgames = list(filter(lambda x: type(x) in [boardgame_classes.BoardGame, boardgame_classes.OwnedBoardGame, boardgame_classes.WishlistBoardGame],  to_filter_boardgames))
+
+    return filtered_boardgames
+
+def filter_non_expansions_out(to_filter_boardgames: list[Union[
+    list[boardgame_classes.BoardGame], list[boardgame_classes.BoardGameExpansion],
+    list[boardgame_classes.OwnedBoardGame], list[boardgame_classes.OwnedBoardGameExpansion],
+    list[boardgame_classes.WishlistBoardGame], list[boardgame_classes.WishlistBoardGameExpansion]]]):
+    
+    filtered_boardgames = list(filter(lambda x: type(x) in [boardgame_classes.BoardGameExpansion, boardgame_classes.OwnedBoardGameExpansion, boardgame_classes.WishlistBoardGameExpansion],  to_filter_boardgames))
+
+    return filtered_boardgames
\ No newline at end of file