diff --git a/datatypes/magicplan/domain/mapper.py b/datatypes/magicplan/domain/mapper.py
index 00efba3d..c841a963 100644
--- a/datatypes/magicplan/domain/mapper.py
+++ b/datatypes/magicplan/domain/mapper.py
@@ -24,7 +24,7 @@ def _map_room(r) -> Room:
         name=r.name,
         width=width,
         length=length,
-        area=r.area,
+        area=round(r.area, 2),
         windows=[_map_window(wi) for wi in r.wall_items if wi.symbol.id.startswith("window")],
         doors=[_map_door(wi) for wi in r.wall_items if wi.symbol.id.startswith("door")],
     )
@@ -34,19 +34,19 @@ def _parse_dimensions(dimensions: str | None) -> tuple[float, float]:
     if not dimensions:
         return 0.0, 0.0
     parts = dimensions.split(" x ")
-    width = float(parts[0].split(" m")[0])
-    length = float(parts[1].split(" m")[0])
+    width = round(float(parts[0].split(" m")[0]), 2)
+    length = round(float(parts[1].split(" m")[0]), 2)
     return width, length
 
 
 def _map_window(wi) -> Window:
     return Window(
-        width=wi.size.x,
-        height=wi.size.z,
-        area=wi.size.x * wi.size.z,
+        width=round(wi.size.x, 2),
+        height=round(wi.size.z, 2),
+        area=round(wi.size.x * wi.size.z, 2),
         opening_type=wi.symbol.id.removeprefix("window"),
     )
 
 
 def _map_door(wi) -> Door:
-    return Door(width=wi.size.x)
+    return Door(width=round(wi.size.x, 2))
diff --git a/datatypes/magicplan/domain/tests/test_mapper.py b/datatypes/magicplan/domain/tests/test_mapper.py
new file mode 100644
index 00000000..6fc80262
--- /dev/null
+++ b/datatypes/magicplan/domain/tests/test_mapper.py
@@ -0,0 +1,106 @@
+import json
+from pathlib import Path
+from typing import Any
+
+import pytest
+from pytest import approx
+
+from datatypes.magicplan.api.response import MagicPlan
+from datatypes.magicplan.domain.mapper import map_plan
+from datatypes.magicplan.domain.models import Plan
+
+FIXTURE_DIR = Path(__file__).parents[4] / "backend" / "magic_plan"
+PLAN_ID = "a7285ed1-878d-47eb-8aa6-85ef9e187516"
+
+
+@pytest.fixture(scope="module")
+def raw_data() -> dict[str, Any]:
+    payload = json.loads(
+        (FIXTURE_DIR / "magicplan_api_plan_response_example.json").read_text()
+    )
+    return payload["data"]
+
+
+@pytest.fixture(scope="module")
+def mp(raw_data: dict[str, Any]) -> MagicPlan:
+    return MagicPlan.model_validate(raw_data)
+
+
+@pytest.fixture(scope="module")
+def plan(mp: MagicPlan) -> Plan:
+    return map_plan(mp)
+
+
+def test_plan_uid(plan: Plan):
+    assert plan.uid == PLAN_ID
+
+
+def test_floor_count(plan: Plan):
+    assert len(plan.floors) == 2
+
+
+def test_first_room_name(plan: Plan):
+    assert plan.floors[0].rooms[0].name == "Kitchen"
+
+
+def test_room_dimensions_are_floats(plan: Plan):
+    room = plan.floors[0].rooms[0]
+    assert isinstance(room.width, float)
+    assert isinstance(room.length, float)
+    assert isinstance(room.area, float)
+
+
+def test_room_area_rounded_to_2dp(plan: Plan):
+    room = plan.floors[0].rooms[0]
+    assert room.area == 7.95
+
+
+def test_room_dimensions_parsed_from_string(plan: Plan):
+    room = plan.floors[0].rooms[0]
+    assert room.width == pytest.approx(2.67)
+    assert room.length == pytest.approx(2.98)
+
+
+def test_kitchen_has_windows(plan: Plan):
+    room = plan.floors[0].rooms[0]
+    assert len(room.windows) >= 1
+
+
+def test_window_fields_are_floats(plan: Plan):
+    window = plan.floors[0].rooms[0].windows[0]
+    assert isinstance(window.width, float)
+    assert isinstance(window.height, float)
+    assert isinstance(window.area, float)
+
+
+def test_window_opening_type_prefix_stripped(plan: Plan):
+    window = plan.floors[0].rooms[0].windows[0]
+    assert not window.opening_type.startswith("window")
+    assert window.opening_type == "casement"
+
+
+def test_window_area_is_width_times_height(plan: Plan):
+    window = plan.floors[0].rooms[0].windows[0]
+    assert window.area == pytest.approx(window.width * window.height, rel=1e-2)
+
+
+def test_window_dimensions_rounded_to_2dp(plan: Plan):
+    window = plan.floors[0].rooms[0].windows[0]
+    assert window.width == 1.40
+    assert window.height == 1.20
+    assert window.area == 1.68
+
+
+def test_door_width_rounded_to_2dp(plan: Plan):
+    door = plan.floors[0].rooms[0].doors[0]
+    assert door.width == 0.79
+
+
+def test_kitchen_has_doors(plan: Plan):
+    room = plan.floors[0].rooms[0]
+    assert len(room.doors) >= 1
+
+
+def test_door_width_is_float(plan: Plan):
+    door = plan.floors[0].rooms[0].doors[0]
+    assert isinstance(door.width, float)