diff --git a/backend/documents_parser/extractor.py b/backend/documents_parser/extractor.py
index eb132a2d..9752e25a 100644
--- a/backend/documents_parser/extractor.py
+++ b/backend/documents_parser/extractor.py
@@ -140,6 +140,8 @@ class PasHubRdSapSiteNotesExtractor:
 
         storeys_raw = self._get_in_doc("Number of storeys:") or "0"
         extensions_raw = self._get_in_doc("Number of Extensions:") or "0"
+        _extensions_first = extensions_raw.split()[0]
+        extensions_count = int(_extensions_first) if _extensions_first.isdigit() else 0
 
         return General(
             epc_checked_before_assessment=self._bool(
@@ -155,7 +157,7 @@ class PasHubRdSapSiteNotesExtractor:
             detachment_type=self._get_in_doc("Detachment Type:") or "",
             number_of_storeys=int(storeys_raw.split()[0]),
             terrain_type=self._get_in_doc("Terrain Type:") or "",
-            number_of_extensions=int(extensions_raw.split()[0]),
+            number_of_extensions=extensions_count,
             electricity_smart_meter=self._bool(
                 "Is an electricity smart meter present?"
             ),