diff --git a/src/bonsai/bonsai/bim/module/project/data.py b/src/bonsai/bonsai/bim/module/project/data.py
index 24284d16db..43d9b13273 100644
--- a/src/bonsai/bonsai/bim/module/project/data.py
+++ b/src/bonsai/bonsai/bim/module/project/data.py
@@ -23,7 +23,7 @@ import ifcopenshell.util.file
 from bonsai.bim.ifc import IfcStore
 from pathlib import Path
 from collections import defaultdict
-from typing import Union
+from typing import Union, Any
 
 
 def refresh():
@@ -108,6 +108,28 @@ class ProjectData:
         return 0
 
 
+class ProjectLibraryData:
+    data: dict[str, Any] = {}
+    is_loaded: bool = False
+
+    @classmethod
+    def load(cls):
+        cls.data = {}
+        cls.data["project_libraries"] = cls.project_libraries()
+        cls.is_loaded = True
+
+    @classmethod
+    def project_libraries(cls) -> dict[int, dict[str, Any]]:
+        results = {}
+        library_file = IfcStore.library_file
+        if library_file is None or library_file.schema == "IFC2X3":
+            return results
+        KEEP_ATTRS = set(("id", "Name", "Description"))
+        for l in library_file.by_type("IfcProjectLibrary"):
+            results[l.id()] = {k: v for k, v in l.get_info().items() if k in KEEP_ATTRS}
+        return results
+
+
 class LinksData:
     linked_data = {}
     enable_culling = False
diff --git a/src/bonsai/bonsai/bim/module/project/ui.py b/src/bonsai/bonsai/bim/module/project/ui.py
index 2613ed1245..2c24681f05 100644
--- a/src/bonsai/bonsai/bim/module/project/ui.py
+++ b/src/bonsai/bonsai/bim/module/project/ui.py
@@ -24,7 +24,7 @@ import bonsai.tool as tool
 from bonsai.bim.helper import prop_with_search
 from bpy.types import Panel, Menu, UIList
 from bonsai.bim.ifc import IfcStore
-from bonsai.bim.module.project.data import ProjectData, LinksData
+from bonsai.bim.module.project.data import ProjectData, LinksData, ProjectLibraryData
 from typing import TYPE_CHECKING
 
 if TYPE_CHECKING:
@@ -463,11 +463,9 @@ class BIM_UL_library(UIList):
                 op = row.operator("bim.change_library_element", text="", icon="DISCLOSURE_TRI_RIGHT", emboss=False)
                 op.element_name = item.name
             row.label(text=item.name)
-            if (
-                item.ifc_definition_id
-                and IfcStore.library_file.schema != "IFC2X3"
-                and IfcStore.library_file.by_type("IfcProjectLibrary")
-            ):
+            if not ProjectLibraryData.is_loaded:
+                ProjectLibraryData.load()
+            if item.ifc_definition_id and ProjectLibraryData.data["project_libraries"]:
                 if item.is_declared:
                     op = row.operator("bim.unassign_library_declaration", text="", icon="KEYFRAME_HLT", emboss=False)
                     op.definition = item.ifc_definition_id