diff --git a/data/furniture.json b/data/furniture.json
index 78d8e78..0938506 100644
--- a/data/furniture.json
+++ b/data/furniture.json
@@ -120,6 +120,52 @@
         }
       ],
       "description": "Centerpiece of the game wall in the library"
+    },
+    {
+      "name": "Library Right Shelving",
+      "description": "To the right of the Kallax",
+      "openings": [
+        {
+          "id": "library-right-shelving-a1",
+          "label": "A1",
+          "zone": "",
+          "width_in": 23.25,
+          "height_in": 10.25,
+          "depth_in": 9.5
+        },
+        {
+          "id": "library-right-shelving-b1",
+          "label": "B1",
+          "zone": "",
+          "width_in": 23.25,
+          "height_in": 10.25,
+          "depth_in": 9.5
+        },
+        {
+          "id": "library-right-shelving-c1",
+          "label": "C1",
+          "zone": "",
+          "width_in": 23.25,
+          "height_in": 10.25,
+          "depth_in": 9.5
+        },
+        {
+          "id": "library-right-shelving-d1",
+          "label": "D1",
+          "zone": "",
+          "width_in": 23.25,
+          "height_in": 10.25,
+          "depth_in": 9.5
+        },
+        {
+          "id": "library-right-shelving-e1",
+          "label": "E1",
+          "zone": "",
+          "width_in": 23.25,
+          "height_in": 10.25,
+          "depth_in": 9.5
+        }
+      ]
     }
   ]
 }
diff --git a/docs/guide.md b/docs/guide.md
index ea8620c..8c97df6 100644
--- a/docs/guide.md
+++ b/docs/guide.md
@@ -118,7 +118,10 @@ top row renders as exactly that — a diagram of the wall, not a list. Create
 units from presets (IKEA Kallax cube 13.25″ × 13.25″ × 15.4″, Billy shelf,
 custom, or a no-size virtual spot like "travel case") as grids of rows ×
 columns; add more sections to an existing unit the same way — a later grid
-continues the row letters, so 3 × 4 under an A row lands as B1…D4. Openings
+continues the row letters, so 3 × 4 under an A row lands as B1…D4. Duplicate a
+unit to stamp out identical furniture — the copy takes the structure
+(openings, sizes, zones, descriptions) under a fresh auto-numbered name,
+never the games — and rename any unit in place. Openings
 are editable (dimensions are all-or-none: three numbers or a no-limit
 spot), reorderable within their row (moves clamp at row boundaries so the
 diagram can't fragment), and deletable. Both units and openings take a
diff --git a/src/bggpipe/static/app.css b/src/bggpipe/static/app.css
index 4797950..e17a1d5 100644
--- a/src/bggpipe/static/app.css
+++ b/src/bggpipe/static/app.css
@@ -556,6 +556,10 @@ select {
   margin-bottom: .8rem; }
 .orow { display: flex; gap: .5rem; }
 .formlabel { margin: 1.2rem 0 .35rem; }
+.renamerow:not([hidden]) { display: flex; gap: .4rem; margin: .3rem 0 .6rem; }
+.renamerow input { font: inherit; font-size: .9rem;
+  border: 2px solid var(--board-edge); border-radius: var(--radius);
+  padding: .25rem .45rem; flex: 0 1 18rem; }
 .unitdesc { margin: -.3rem 0 .7rem; display: flex; gap: .6rem;
   align-items: center; flex-wrap: wrap; }
 .unitdesc .descform:not([hidden]) { display: flex; gap: .4rem; flex: 1 1 16rem; }
diff --git a/src/bggpipe/templates/pages/shelves.html b/src/bggpipe/templates/pages/shelves.html
index 9b27818..e40f07d 100644
--- a/src/bggpipe/templates/pages/shelves.html
+++ b/src/bggpipe/templates/pages/shelves.html
@@ -121,8 +121,16 @@ function unitBlock(u) {
   return `<section class="card stack unit">
     <div class="unithead"><h2>${esc(u.name)}</h2>
       <span class="editactions">
+        <button class="dupunit" data-unit="${esc(u.name)}"
+                title="copy this unit's openings — sizes, zones, descriptions — as a new empty unit">
+          duplicate</button>
+        <button class="renameunit linkish" data-unit="${esc(u.name)}">rename</button>
         <button class="delunit danger" data-unit="${esc(u.name)}">remove unit</button>
       </span></div>
+    <p class="renamerow" hidden>
+      <input class="renameinput" value="${esc(u.name)}" aria-label="new unit name">
+      <button class="primary saverename" data-unit="${esc(u.name)}">save</button>
+    </p>
     <p class="unitdesc">
       <span class="meta">${esc(u.description || "")}</span>
       <button class="linkish editunitdesc" data-unit="${esc(u.name)}">
@@ -301,7 +309,23 @@ function wire() {
       if (confirm(`Remove "${b.dataset.unit}" and its openings? Its games become unshelved.`))
         post("/api/furniture/delete-unit", {name: b.dataset.unit});
     });
-  document.querySelectorAll(".editunitdesc").forEach(b =>
+  document.querySelectorAll(".dupunit").forEach(b =>
+    b.onclick = async () => {
+      const res = await post("/api/furniture/duplicate-unit", {name: b.dataset.unit});
+      if (res) showToast(`duplicated — rename the copy and start filling it`);
+    });
+  document.querySelectorAll(".renameunit").forEach(b =>
+    b.onclick = () => {
+      const row = b.closest(".unithead").nextElementSibling;
+      row.hidden = !row.hidden;
+      if (!row.hidden) row.querySelector("input").focus();
+    });
+  document.querySelectorAll(".saverename").forEach(b =>
+    b.onclick = () => post("/api/furniture/edit-unit", {
+      name: b.dataset.unit,
+      new_name: b.closest(".renamerow").querySelector("input").value,
+    }));
+  document.querySelectorAll(".editunitdesc").forEach(b =
     b.onclick = () => {
       const form = b.closest(".unitdesc").querySelector(".descform");
       form.hidden = !form.hidden;
diff --git a/src/bggpipe/webreview.py b/src/bggpipe/webreview.py
index d656f6b..d0e0504 100644
--- a/src/bggpipe/webreview.py
+++ b/src/bggpipe/webreview.py
@@ -227,7 +227,9 @@ class ResearchBody(BaseModel):
 
 class UnitBody(BaseModel):
     name: str
-    description: str = ""  # free text: "the wall behind the couch"
+    # None = leave alone (rename-only edits must not wipe a description)
+    description: str | None = None
+    new_name: str = ""  # edit-unit only: rename
 
 
 class OpeningsBody(BaseModel):
@@ -1218,7 +1220,7 @@ def create_app(
             units.append(
                 {
                     "name": name,
-                    "description": body.description.strip(),
+                    "description": (body.description or "").strip(),
                     "openings": [],
                 }
             )
@@ -1231,10 +1233,47 @@ def create_app(
             unit = next((u for u in units if u["name"] == body.name), None)
             if unit is None:
                 raise HTTPException(404, "no such unit")
-            unit["description"] = body.description.strip()
+            if body.new_name.strip() and body.new_name.strip() != body.name:
+                new = body.new_name.strip()
+                if any(u["name"] == new for u in units):
+                    raise HTTPException(409, f"a unit named {new!r} already exists")
+                # opening ids are stable through a rename: locations and
+                # the export's URLs never notice
+                unit["name"] = new
+            if body.description is not None:
+                unit["description"] = body.description.strip()
 
         return _mutate_furniture(apply)
 
+    @app.post("/api/furniture/duplicate-unit")
+    def api_duplicate_unit(body: UnitBody) -> dict:
+        """Clone a unit's STRUCTURE — openings with dims, zones, and
+        descriptions, under fresh ids — never its game assignments. The
+        copy takes the first free '<name> 2'-style name."""
+
+        def clone(units):
+            source = next((u for u in units if u["name"] == body.name), None)
+            if source is None:
+                raise HTTPException(404, "no such unit")
+            n = 2
+            while any(u["name"] == f"{body.name} {n}" for u in units):
+                n += 1
+            copy = {
+                "name": f"{body.name} {n}",
+                "description": source.get("description", ""),
+                "openings": [],
+            }
+            units.append(copy)
+            for opening in source.get("openings", []):
+                copy["openings"].append(
+                    {
+                        **{k: v for k, v in opening.items() if k != "id"},
+                        "id": new_opening_id(units, copy["name"], opening["label"]),
+                    }
+                )
+
+        return _mutate_furniture(clone)
+
     @app.post("/api/furniture/delete-unit")
     def api_delete_unit(body: UnitBody) -> dict:
         def drop(units):
diff --git a/tests/test_shelves.py b/tests/test_shelves.py
index a24f986..a1c44ff 100644
--- a/tests/test_shelves.py
+++ b/tests/test_shelves.py
@@ -875,3 +875,106 @@ def test_unit_descriptions_round_trip(tmp_path):
 
     saved = _json.loads(cfg.furniture_path.read_text())["units"][0]
     assert saved["description"] == "now in the study"
+
+
+def test_duplicate_unit_copies_structure_never_games(tmp_path):
+    games = {
+        "1": {
+            "bgg_id": 1,
+            "name": "Catan",
+            "dims": {
+                "width_in": 11,
+                "length_in": 11,
+                "depth_in": 3,
+                "source": "version",
+            },
+        }
+    }
+    web, cfg = _web(tmp_path, games)
+    web.post(
+        "/api/furniture/add-unit",
+        json={"name": "Kallax", "description": "the original"},
+    )
+    web.post(
+        "/api/furniture/add-openings",
+        json={
+            "unit": "Kallax",
+            "rows": 1,
+            "cols": 2,
+            "zone": "cubes",
+            "width_in": 13.25,
+            "height_in": 13.25,
+            "depth_in": 15.4,
+        },
+    )
+    first = web.get("/api/shelves").json()["units"][0]["openings"][0]["id"]
+    web.post(
+        "/api/furniture/edit-opening", json={"id": first, "description": "top left"}
+    )
+    web.post("/api/locate", json={"key": "1", "opening_id": first})
+
+    web.post("/api/furniture/duplicate-unit", json={"name": "Kallax"})
+    state = web.get("/api/shelves").json()
+    names = [u["name"] for u in state["units"]]
+    assert names == ["Kallax", "Kallax 2"]
+    copy = state["units"][1]
+    assert copy["description"] == "the original"
+    assert [o["label"] for o in copy["openings"]] == ["A1", "A2"]
+    assert copy["openings"][0]["description"] == "top left"
+    # fresh ids, no residents copied
+    original_ids = {o["id"] for o in state["units"][0]["openings"]}
+    copy_ids = {o["id"] for o in copy["openings"]}
+    assert original_ids.isdisjoint(copy_ids)
+    assert all(o["games"] == 0 for o in copy["openings"])
+    # duplicating again numbers past the taken name
+    web.post("/api/furniture/duplicate-unit", json={"name": "Kallax"})
+    names = [u["name"] for u in web.get("/api/shelves").json()["units"]]
+    assert names == ["Kallax", "Kallax 2", "Kallax 3"]
+
+
+def test_rename_unit_keeps_openings_locations_and_description(tmp_path):
+    games = {
+        "1": {
+            "bgg_id": 1,
+            "name": "Catan",
+            "dims": {
+                "width_in": 11,
+                "length_in": 11,
+                "depth_in": 3,
+                "source": "version",
+            },
+        }
+    }
+    web, cfg = _web(tmp_path, games)
+    web.post(
+        "/api/furniture/add-unit", json={"name": "Kallax", "description": "keep me"}
+    )
+    web.post(
+        "/api/furniture/add-openings",
+        json={
+            "unit": "Kallax",
+            "label": "A1",
+            "width_in": 13.25,
+            "height_in": 13.25,
+            "depth_in": 15.4,
+        },
+    )
+    oid = web.get("/api/shelves").json()["units"][0]["openings"][0]["id"]
+    web.post("/api/locate", json={"key": "1", "opening_id": oid})
+    web.post(
+        "/api/furniture/edit-unit", json={"name": "Kallax", "new_name": "Den wall"}
+    )
+    state = web.get("/api/shelves").json()
+    unit = state["units"][0]
+    assert unit["name"] == "Den wall"
+    assert unit["description"] == "keep me"  # rename-only edit wipes nothing
+    assert unit["openings"][0]["games"] == 1  # opening ids stable: game stays
+    # rename onto a taken name refuses
+    web.post("/api/furniture/add-unit", json={"name": "Loft"})
+    assert (
+        web.post(
+            "/api/furniture/edit-unit",
+            json={"name": "Den wall", "new_name": "Loft"},
+        ).status_code
+        == 409
+    )