diff --git a/rhino/elemente_uebersicht.py b/rhino/elemente_uebersicht.py
index 82636f6..0df407c 100644
--- a/rhino/elemente_uebersicht.py
+++ b/rhino/elemente_uebersicht.py
@@ -208,6 +208,88 @@ class ElementeUebersichtBridge(panel_base.BaseBridge):
                         print("[UEBERSICHT] zoom:", ex)
             except Exception as ex:
                 print("[UEBERSICHT] zoom find:", ex)
+        elif t == "EXPORT_BILANZ":
+            self._export_bilanz()
+
+    def _export_bilanz(self):
+        """Exportiert SIA-416 Bilanz als CSV (Excel-kompatibel: Semikolon-
+        Separator + UTF-8 BOM + Komma als Dezimaltrenner). Wide-Format:
+        eine Spalte pro Geschoss + Total-Spalte, Zeilen pro Kategorie.
+        """
+        doc = Rhino.RhinoDoc.ActiveDoc
+        if doc is None: return
+        # Geschoss-Liste (geordnet) + Total am Ende
+        geschosse = _elm._load_geschosse(doc) or []
+        gs_list = [g for g in geschosse
+                   if isinstance(g, dict) and g.get("isGeschoss")]
+        # Bilanz pro Geschoss + Total via compute_sia_bilanz
+        per_gid = {}  # gid → bilanz dict
+        for g in gs_list:
+            per_gid[g["id"]] = _elm.compute_sia_bilanz(
+                doc, "geschoss:" + g["id"])
+        total = _elm.compute_sia_bilanz(doc, "total")
+        # SaveFileDialog
+        try:
+            from Rhino.UI import SaveFileDialog
+            sfd = SaveFileDialog()
+            sfd.DefaultExt = "csv"
+            sfd.Filter = "CSV (*.csv)|*.csv"
+            sfd.FileName = "sia_bilanz.csv"
+            ok = False
+            try: ok = sfd.ShowSaveDialog()
+            except Exception:
+                try: ok = sfd.ShowDialog()
+                except Exception: ok = False
+            if not ok:
+                print("[UEBERSICHT] Bilanz-Export abgebrochen"); return
+            path = sfd.FileName
+        except Exception as ex:
+            print("[UEBERSICHT] SaveFileDialog:", ex); return
+
+        # Zeilen-Definition: (Label, Bilanz-Key, ist_personen?)
+        rows = [
+            ("HNF (m²)",      "hnf",      False),
+            ("NNF (m²)",      "nnf",      False),
+            ("NF  (m²)",      "nf",       False),
+            ("VF  (m²)",      "vf",       False),
+            ("FF  (m²)",      "ff",       False),
+            ("NGF (m²)",      "ngf",      False),
+            ("GF  (m²)",      "gf",       False),
+            ("AGF (m²)",      "agf",      False),
+            ("Räume",         "count",    True),
+            ("Personen",      "personen", True),
+        ]
+
+        def _fmt(val, is_count):
+            if val is None: return ""
+            if is_count: return str(int(val))
+            return "{:.2f}".format(float(val)).replace(".", ",")
+
+        def _esc(s):
+            s = str(s)
+            if ";" in s or '"' in s or "\n" in s:
+                return '"' + s.replace('"', '""') + '"'
+            return s
+
+        try:
+            import io
+            with io.open(path, "w", encoding="utf-8-sig", newline="") as f:
+                # Header — Kategorie + Geschoss-Namen + Total
+                header = ["Kategorie"]
+                for g in gs_list: header.append(_esc(g.get("name") or "?"))
+                header.append("Total")
+                f.write(";".join(header) + "\n")
+                for label, key, is_count in rows:
+                    line = [_esc(label)]
+                    for g in gs_list:
+                        b = per_gid.get(g["id"], {})
+                        line.append(_fmt(b.get(key, 0), is_count))
+                    line.append(_fmt(total.get(key, 0), is_count))
+                    f.write(";".join(line) + "\n")
+            print("[UEBERSICHT] SIA-Bilanz exportiert: {} ({} Geschosse + Total)".format(
+                path, len(gs_list)))
+        except Exception as ex:
+            print("[UEBERSICHT] CSV schreiben:", ex)
 
 
 def open_as_window():
diff --git a/src/ElementeUebersichtApp.jsx b/src/ElementeUebersichtApp.jsx
index 11e74bc..bd0a9ab 100644
--- a/src/ElementeUebersichtApp.jsx
+++ b/src/ElementeUebersichtApp.jsx
@@ -128,6 +128,9 @@ export default function ElementeUebersichtApp() {
             }} />
           <BarButton icon="unfold_more" onClick={expandAll} title="Alle aufklappen" />
           <BarButton icon="unfold_less" onClick={collapseAll} title="Alle einklappen" />
+          <BarButton icon="file_download"
+            onClick={() => send('EXPORT_BILANZ', {})}
+            title="SIA-416 Bilanz als CSV exportieren (eine Spalte pro Geschoss + Total)" />
         </div>
         {/* Kind-Filter Chips */}
         <div style={{ display: 'flex', flexWrap: 'wrap', gap: 3 }}>