diff --git a/backend/app/db/functions/magic_plan_functions.py b/backend/app/db/functions/magic_plan_functions.py
index 4a8d7940..f4cebfb7 100644
--- a/backend/app/db/functions/magic_plan_functions.py
+++ b/backend/app/db/functions/magic_plan_functions.py
@@ -4,7 +4,7 @@ from sqlalchemy import delete, select
 from sqlalchemy.dialects.postgresql import insert as pg_insert
 from sqlmodel import Session, col
 
-from datatypes.magicplan.domain.models import Floor, Plan
+from datatypes.magicplan.domain.models import Door, Floor, Plan, Room, Window
 from backend.app.db.models.magic_plan import (
     MagicPlanDoorModel,
     MagicPlanFloorModel,
@@ -17,7 +17,86 @@ from backend.app.db.models.magic_plan import (
 def get_plan_by_uploaded_file_id(
     session: Session, uploaded_file_id: int
 ) -> Optional[Plan]:
-    raise NotImplementedError
+    plan_row = session.execute(
+        select(MagicPlanPlanModel).where(
+            col(MagicPlanPlanModel.uploaded_file_id) == uploaded_file_id
+        )
+    ).scalar_one_or_none()
+
+    if plan_row is None:
+        return None
+
+    floor_rows = list(
+        session.execute(
+            select(MagicPlanFloorModel)
+            .where(col(MagicPlanFloorModel.magic_plan_plan_id) == plan_row.id)
+            .order_by(col(MagicPlanFloorModel.level))
+        ).scalars()
+    )
+
+    return Plan(
+        uid=plan_row.magic_plan_uid if plan_row.magic_plan_uid is not None else "",
+        name=plan_row.name,
+        address=plan_row.address,
+        postcode=plan_row.postcode,
+        floors=[_to_floor(session, f) for f in floor_rows],
+    )
+
+
+def _to_floor(session: Session, row: MagicPlanFloorModel) -> Floor:
+    room_rows = list(
+        session.execute(
+            select(MagicPlanRoomModel).where(
+                col(MagicPlanRoomModel.magic_plan_floor_id) == row.id
+            )
+        ).scalars()
+    )
+    return Floor(
+        level=row.level,
+        name=None,
+        rooms=[_to_room(session, r) for r in room_rows],
+    )
+
+
+def _to_room(session: Session, row: MagicPlanRoomModel) -> Room:
+    window_rows = list(
+        session.execute(
+            select(MagicPlanWindowModel)
+            .where(col(MagicPlanWindowModel.magic_plan_room_id) == row.id)
+            .order_by(
+                col(MagicPlanWindowModel.magic_plan_room_id),
+                col(MagicPlanWindowModel.id),
+            )
+        ).scalars()
+    )
+    door_rows = list(
+        session.execute(
+            select(MagicPlanDoorModel).where(
+                col(MagicPlanDoorModel.magic_plan_room_id) == row.id
+            )
+        ).scalars()
+    )
+    return Room(
+        name=row.name if row.name is not None else "",
+        width_m=row.width_m if row.width_m is not None else 0.0,
+        length_m=row.length_m if row.length_m is not None else 0.0,
+        area_m2=row.area_m2 if row.area_m2 is not None else 0.0,
+        windows=[_to_window(w) for w in window_rows],
+        doors=[_to_door(d) for d in door_rows],
+    )
+
+
+def _to_window(row: MagicPlanWindowModel) -> Window:
+    return Window(
+        width_m=row.width_m if row.width_m is not None else 0.0,
+        height_m=row.height_m if row.height_m is not None else 0.0,
+        area_m2=row.area_m2 if row.area_m2 is not None else 0.0,
+        opening_type=row.opening_type if row.opening_type is not None else "",
+    )
+
+
+def _to_door(row: MagicPlanDoorModel) -> Door:
+    return Door(width_mm=row.width_mm if row.width_mm is not None else 0.0)
 
 
 def save_plan(session: Session, plan: Plan, uploaded_file_id: int) -> None: