diff --git a/src/assets/dash_clientside.js b/src/assets/dash_clientside.js
index 2c41e6a..d1cb008 100644
--- a/src/assets/dash_clientside.js
+++ b/src/assets/dash_clientside.js
@@ -1,14 +1,23 @@
 window.dash_clientside = Object.assign({}, window.dash_clientside, {
   leaflet: {
     pointToLayer: function (feature, latlng, context) {
-      return L.circleMarker(latlng, {
-        radius: 5,
+      const isHome = Boolean(feature.properties.is_home);
+      const marker = L.circleMarker(latlng, {
+        radius: isHome ? 8 : 5,
         fillColor: feature.properties.marker_color,
         color: "white",
         weight: 1,
         opacity: 1,
         fillOpacity: 0.8,
       }).bindTooltip(feature.properties.tooltip);
+      // Le point de l'organisme consulté (is_home) doit toujours passer
+      // au-dessus de ses contreparties, quel que soit l'ordre des couches.
+      if (isHome) {
+        marker.on("add", function () {
+          marker.bringToFront();
+        });
+      }
+      return marker;
     },
     clusterToLayer: function (feature, latlng, index, context) {
       console.log(feature);
diff --git a/src/figures.py b/src/figures.py
index dc46ac7..855fec4 100644
--- a/src/figures.py
+++ b/src/figures.py
@@ -582,6 +582,8 @@ def get_org_location_map(
         "acheteur": build_org_markers(lff, "acheteur"),
         "titulaire": build_org_markers(lff, "titulaire"),
     }
+    for marker in markers_by_type[home_type]:
+        marker["is_home"] = True
 
     ns = Namespace("dash_clientside", "leaflet")
     point_to_layer = ns("pointToLayer")
@@ -589,8 +591,9 @@ def get_org_location_map(
 
     layers: list = [dl.TileLayer()]
     all_points: list[tuple[float, float]] = []
-    # Ordre fixe (titulaire puis acheteur), comme sur /observatoire : la
-    # couche acheteur est toujours peinte au-dessus, quel que soit home_type.
+    # Ordre fixe (titulaire puis acheteur), comme sur /observatoire. Le point
+    # de l'organisme consulté (is_home) est de toute façon toujours ramené au
+    # premier plan côté client (pointToLayer, dash_clientside.js).
     for org_type in ("titulaire", "acheteur"):
         markers = markers_by_type[org_type]
         if not markers:
diff --git a/tests/test_figures.py b/tests/test_figures.py
index c8c83f4..be35561 100644
--- a/tests/test_figures.py
+++ b/tests/test_figures.py
@@ -238,12 +238,8 @@ def test_build_org_markers_missing_columns_returns_empty():
     assert build_org_markers(lff, "titulaire") == []
 
 
-def test_get_org_location_map_bounds_cover_home_and_counterpart():
-    import dash_leaflet as dl
-
-    from src.figures import get_org_location_map
-
-    dff = pl.DataFrame(
+def _org_map_dff():
+    return pl.DataFrame(
         [
             {
                 "uid": "u1",
@@ -257,7 +253,13 @@ def test_get_org_location_map_bounds_cover_home_and_counterpart():
         ]
     )
 
-    leaflet_map = get_org_location_map(dff, "acheteur", "test-map")
+
+def test_get_org_location_map_bounds_cover_home_and_counterpart():
+    import dash_leaflet as dl
+
+    from src.figures import get_org_location_map
+
+    leaflet_map = get_org_location_map(_org_map_dff(), "acheteur", "test-map")
 
     assert isinstance(leaflet_map, dl.Map)
     assert leaflet_map.bounds == [[48.11, -1.68], [48.85, 2.35]]
@@ -269,6 +271,44 @@ def test_get_org_location_map_bounds_cover_home_and_counterpart():
     }
 
 
+def test_get_org_location_map_marks_home_org_marker_acheteur():
+    import dash_leaflet as dl
+
+    from src.figures import get_org_location_map
+
+    leaflet_map = get_org_location_map(_org_map_dff(), "acheteur", "test-map")
+
+    geojson_layers = {
+        layer.id: layer
+        for layer in leaflet_map.children
+        if isinstance(layer, dl.GeoJSON)
+    }
+    acheteur_features = geojson_layers["test-map-acheteur"].data["features"]
+    titulaire_features = geojson_layers["test-map-titulaire"].data["features"]
+
+    assert all(f["properties"]["is_home"] for f in acheteur_features)
+    assert all(not f["properties"].get("is_home") for f in titulaire_features)
+
+
+def test_get_org_location_map_marks_home_org_marker_titulaire():
+    import dash_leaflet as dl
+
+    from src.figures import get_org_location_map
+
+    leaflet_map = get_org_location_map(_org_map_dff(), "titulaire", "test-map")
+
+    geojson_layers = {
+        layer.id: layer
+        for layer in leaflet_map.children
+        if isinstance(layer, dl.GeoJSON)
+    }
+    acheteur_features = geojson_layers["test-map-acheteur"].data["features"]
+    titulaire_features = geojson_layers["test-map-titulaire"].data["features"]
+
+    assert all(f["properties"]["is_home"] for f in titulaire_features)
+    assert all(not f["properties"].get("is_home") for f in acheteur_features)
+
+
 def test_get_org_location_map_defaults_to_france_view_without_coordinates():
     from src.figures import get_org_location_map