diff --git a/backend/Property.py b/backend/Property.py
index bb545248..41696c37 100644
--- a/backend/Property.py
+++ b/backend/Property.py
@@ -14,7 +14,7 @@ from epc_api.client import EpcClient
 from BaseUtility import Definitions
 from recommendations.rdsap_tables import england_wales_age_band_lookup, FLOOR_LEVEL_MAP
 from recommendations.recommendation_utils import (
-    estimate_perimeter, get_wall_type, estimate_external_wall_area, esimtate_pitched_roof_area
+    estimate_perimeter, get_wall_type, estimate_external_wall_area, esimtate_pitched_roof_area, estimate_windows
 )
 
 ENVIRONMENT = os.environ.get('ENVIRONMENT', 'dev')
@@ -87,6 +87,7 @@ class Property(Definitions):
         self.insulation_floor_area = None
         self.number_lighting_outlets = None
         self.floor_level = None
+        self.number_of_windows = None
 
         self.current_adjusted_energy = None
         self.expected_adjusted_energy = None
@@ -332,6 +333,7 @@ class Property(Definitions):
         self.set_wall_type()
         self.set_floor_type()
         self.set_floor_level()
+        self.set_windows_count()
 
     def set_age_band(self):
         """
@@ -850,3 +852,18 @@ class Property(Definitions):
         """
         self.current_adjusted_energy = current_adjusted_energy
         self.expected_adjusted_energy = expected_adjusted_energy
+
+    def set_windows_count(self):
+        """
+        Using the estimate_windows function, this method will set the number of windows in the property
+        :return:
+        """
+
+        self.number_of_windows = estimate_windows(
+            property_type=self.data["property-type"],
+            built_form=self.data["built-form"],
+            construction_age_band=self.construction_age_band,
+            floor_area=self.floor_area,
+            number_habitable_rooms=self.number_of_rooms,
+            extension_count=float(self.data["extension-count"]),
+        )