diff --git a/etl/epc/Record.py b/etl/epc/Record.py
index 0842a07c..defe13f4 100644
--- a/etl/epc/Record.py
+++ b/etl/epc/Record.py
@@ -566,6 +566,7 @@ class EPCRecord:
             "multi_glaze_proportion": addr.landlord_multi_glaze_proportion,
             "construction_age_band": addr.landlord_construction_age_band,
         }
+        landlord_remapping = {k: v for k, v in landlord_remapping.items() if v is not None}
 
         # Sanity check - ensure valid keys
         if any(k not in self._prepared_epc for k in landlord_remapping):
@@ -573,6 +574,7 @@ class EPCRecord:
 
         self.landlord_differences = {}  # Anything actaully changed
         for k, v in landlord_remapping.items():
+
             if k == "total_floor_area":
                 existing = self._prepared_epc.get(k)
                 if existing is not None and v is not None and abs(existing - v) > 1:  # 1m tolerance