diff --git a/hub/imports/geometry/geojson.py b/hub/imports/geometry/geojson.py
index 8cbbccbe..1adf95d1 100644
--- a/hub/imports/geometry/geojson.py
+++ b/hub/imports/geometry/geojson.py
@@ -120,33 +120,34 @@ class Geojson:
   def _store_shared_percentage_to_walls(self, city, city_mapped):
     for building in city.buildings:
       building_mapped = city_mapped[building.name]
-      for entry in building_mapped:
-        if building_mapped[entry]['shared_points'] <= 3:
+      for wall in building.walls:
+        percentage = 0
+        ground_line = []
+        for point in wall.perimeter_polygon.coordinates:
+          if point[2] < 0.5:
+            ground_line.append(point)
+        # todo: erase when we have no triangulation
+        if len(ground_line) < 2:
           continue
-        line = [building_mapped[entry]['line_start'], building_mapped[entry]['line_end']]
-        neighbour_line = [building_mapped[entry]['neighbour_line_start'], building_mapped[entry]['neighbour_line_end']]
-        neighbour_height = city.city_object(building_mapped[entry]['neighbour_name']).max_height
-        for wall in building.walls:
-          percentage = 0
-          ground_line = []
-          for point in wall.perimeter_polygon.coordinates:
-            if point[2] < 0.5:
-              ground_line.append(point)
-          # todo: erase when we have no triangulation
-          if len(ground_line) < 2:
+        # todo: erase down to here
+        for entry in building_mapped:
+          if building_mapped[entry]['shared_points'] <= 5:
             continue
-          # todo: erase down to here
+          line = [building_mapped[entry]['line_start'], building_mapped[entry]['line_end']]
+          neighbour_line = [building_mapped[entry]['neighbour_line_start'],
+                            building_mapped[entry]['neighbour_line_end']]
+          neighbour_height = city.city_object(building_mapped[entry]['neighbour_name']).max_height
           if self._find_wall(line, ground_line):
             line_shared = (GeometryHelper.distance_between_points(line[0], line[1]) +
                            GeometryHelper.distance_between_points(neighbour_line[0], neighbour_line[1]) -
                            GeometryHelper.distance_between_points(line[1], neighbour_line[0]) -
                            GeometryHelper.distance_between_points(line[0], neighbour_line[1])) / 2
-            percentage = line_shared / GeometryHelper.distance_between_points(line[0], line[1])
+            percentage_ground = line_shared / GeometryHelper.distance_between_points(line[0], line[1])
             percentage_height = neighbour_height / building.max_height
             if percentage_height > 1:
               percentage_height = 1
-            percentage = percentage * percentage_height
-          wall.percentage_shared = percentage
+            percentage += percentage_ground * percentage_height
+        wall.percentage_shared = percentage
 
   @property
   def city(self) -> City:
@@ -157,6 +158,7 @@ class Geojson:
       missing_functions = []
       buildings = []
       building_id = 0
+      lod = 1
       for feature in self._geojson['features']:
         extrusion_height = 0
         if self._extrusion_height_field is not None:
@@ -182,7 +184,6 @@ class Geojson:
           building_name = f'building_{building_id}'
           building_id += 1
         polygons = []
-        lod = 1
         for part, coordinates in enumerate(geometry['coordinates']):
           polygons = self._get_polygons(polygons, coordinates)
           for zone, polygon in enumerate(polygons):
@@ -205,6 +206,9 @@ class Geojson:
       for building in buildings:
         self._city.add_city_object(building)
       self._city.level_of_detail.geometry = lod
+      if lod == 1:
+        lines_information = GeometryHelper.city_mapping(self._city)
+        self._store_shared_percentage_to_walls(self._city, lines_information)
       if len(missing_functions) > 0:
         print(f'There are unknown functions {missing_functions}')
     return self._city
diff --git a/hub/unittests/test_geometry_factory.py b/hub/unittests/test_geometry_factory.py
index 940fe861..e98e2a78 100644
--- a/hub/unittests/test_geometry_factory.py
+++ b/hub/unittests/test_geometry_factory.py
@@ -9,8 +9,6 @@ from pathlib import Path
 from unittest import TestCase
 from hub.helpers.geometry_helper import GeometryHelper
 
-from numpy import inf
-
 import hub.exports.exports_factory
 from hub.imports.construction_factory import ConstructionFactory
 from hub.imports.geometry_factory import GeometryFactory
@@ -135,7 +133,7 @@ class TestGeometryFactory(TestCase):
     """
     Test geojson import
     """
-    file = 'concordia.geojson'
+    file = 'neighbours.geojson'
     city = self._get_city(file, 'geojson',
                           height_field='citygml_me',
                           year_of_construction_field='ANNEE_CONS',
@@ -144,6 +142,9 @@ class TestGeometryFactory(TestCase):
     hub.exports.exports_factory.ExportsFactory('obj', city, self._output_path).export()
     self.assertEqual(207, len(city.buildings), 'wrong number of buildings')
     self._check_buildings(city)
+    for building in city.buildings:
+      for wall in building.walls:
+        self.assertIsNotNone(wall.percentage_shared, 'wall percentage shared is not assigned')
 
   def test_map_neighbours(self):
     """