diff --git a/etl/ownership/projects/midlands_portfolio/app.py b/etl/ownership/projects/midlands_portfolio/app.py
index ae7822a6..f868bd3b 100644
--- a/etl/ownership/projects/midlands_portfolio/app.py
+++ b/etl/ownership/projects/midlands_portfolio/app.py
@@ -163,5 +163,10 @@ def app():
     }
     print(body)
 
+    # We read in the current valuation data and identify if there are any uprns that need to be added
+    previous_valuations = pd.read_excel(
+        "/Users/khalimconn-kowlessar/Documents/hestia/Customers/sfr/sfr property valuations.xlsx")
+    asset_list[~asset_list["uprn"].astype(str).isin(previous_valuations["uprn"].astype(str))]
+
     # We now need a distinct step to prepare final outputs
     portfolio_timestamp = "2024-08-20 15:51:10.292075"