diff --git a/etl/ownership/Ownership.py b/etl/ownership/Ownership.py
index a3aa9e15..5f506881 100644
--- a/etl/ownership/Ownership.py
+++ b/etl/ownership/Ownership.py
@@ -4,7 +4,7 @@ from tqdm import tqdm
 import pandas as pd
 import Levenshtein
 import re
-from utils.s3 import save_excel_to_s3
+from utils.s3 import save_excel_to_s3, read_excel_from_s3
 from utils.logger import setup_logger
 from backend.SearchEpc import SearchEpc
 from etl.spatial.OpenUprnClient import OpenUprnClient
@@ -948,7 +948,7 @@ class Ownership:
         matched_addresses_final = self.matched_addresses[
             ~self.matched_addresses["sold_recently"] &
             ~self.matched_addresses["sale_lodged_recently"]
-            ]
+            ].copy()
 
         logger.info("Performing conservation area and listed/herigage building filtering")
 
@@ -973,7 +973,7 @@ class Ownership:
 
         # Filter combined_matching_lookup accordingly
         combined_matching_lookup_final = self.combined_matching_lookup[
-            self.combined_matching_lookup["UPRN"].isin(self.combined_matching_lookup["UPRN"])
+            self.combined_matching_lookup["UPRN"].isin(matched_addresses_final["UPRN"])
         ]
 
         # Roll up portfolio
@@ -991,8 +991,16 @@ class Ownership:
             )
         ]
 
+        # We perform some checks
+        if self.portfolio_owners["total_number_of_properties"].sum() != self.portfolio_properties["UPRN"].nunique():
+            raise ValueError("Portfolio owners and properties don't match")
+
         self.portfolio_epc_data = self.epc_data[self.epc_data["UPRN"].isin(self.portfolio_properties["UPRN"])]
 
+        # Additional checks
+        if self.portfolio_properties["UPRN"].nunique() != self.portfolio_epc_data["UPRN"].nunique():
+            raise ValueError("Portfolio properties and epc data don't match")
+
         logger.info("Storing final outpus")
         # Store data
         save_excel_to_s3(
@@ -1028,3 +1036,49 @@ class Ownership:
         )
 
         return asset_list
+
+    def create_final_outputs(self, portfolio_timestamp):
+        """
+        Given the completed outputs of the matching process, this function creates the final outputs, after matching
+        valuation data, and creates a "working" directory, which is our current view of the sfr portfolio. This means
+        that we can iterate on the portfolio without affecting the final outputs, and then once we're happy with the
+        new version, we can commit those files to the "working" directory. This inforamtion shouldn't update very
+        often and so we're ok to store this at a daily level
+        :return:
+        """
+
+        # Step 1: Read in the valuations data
+        valuations = read_excel_from_s3(
+            bucket_name=self.bucket,
+            file_key=f"ownership/{self.project_name}/sfr property valuations.xlsx",
+            header_row=0
+        )
+
+        # Load in the portfolio data
+        # 1) owners
+        portfolio_owners = read_excel_from_s3(
+            bucket_name=self.bucket,
+            file_key=f"ownership/{self.project_name}/{portfolio_timestamp}/portfolio_owners.xlsx",
+            header_row=0
+        )
+        # 2) EPC
+        portfolio_epc_data = read_excel_from_s3(
+            bucket_name=self.bucket,
+            file_key=f"ownership/{self.project_name}/{portfolio_timestamp}/portfolio_epc_data.xlsx",
+            header_row=0
+        )
+
+        # 3) properties
+        portfolio_properties = read_excel_from_s3(
+            bucket_name=self.bucket,
+            file_key=f"ownership/{self.project_name}/{portfolio_timestamp}/portfolio_properties.xlsx",
+            header_row=0
+        )
+
+        portfolio_epc_data["UPRN"].duplicated().sum()
+        portfolio_properties["UPRN"].duplicated().sum()
+        portfolio_properties[~portfolio_properties["UPRN"].astype(str).isin(portfolio_epc_data["UPRN"].astype(str))]
+
+        portfolio_properties[~portfolio_properties["UPRN"].astype(str).isin(portfolio_epc_data["UPRN"].astype(str))]
+
+        portfolio_epc_data.shape
diff --git a/etl/ownership/projects/midlands_portfolio/app.py b/etl/ownership/projects/midlands_portfolio/app.py
index 99b8fc48..ae7822a6 100644
--- a/etl/ownership/projects/midlands_portfolio/app.py
+++ b/etl/ownership/projects/midlands_portfolio/app.py
@@ -162,3 +162,6 @@ def app():
         "budget": None,
     }
     print(body)
+
+    # We now need a distinct step to prepare final outputs
+    portfolio_timestamp = "2024-08-20 15:51:10.292075"