diff --git a/doc/changelog.d/1721.added.md b/doc/changelog.d/1721.added.md
new file mode 100644
index 0000000000..44b3792cf2
--- /dev/null
+++ b/doc/changelog.d/1721.added.md
@@ -0,0 +1 @@
+single design per modeler session refactoring
\ No newline at end of file
diff --git a/src/ansys/geometry/core/__init__.py b/src/ansys/geometry/core/__init__.py
index d704dd21f2..96ec99365f 100644
--- a/src/ansys/geometry/core/__init__.py
+++ b/src/ansys/geometry/core/__init__.py
@@ -55,12 +55,5 @@
 """Global constant for checking whether to use service colors for plotting
 purposes. If set to False, the default colors will be used (speed gain)."""
 
-DISABLE_MULTIPLE_DESIGN_CHECK: bool = False
-"""Global constant for disabling the ``ensure_design_is_active`` check.
-
-Only set this to false if you are sure you want to disable this check
-and you will ONLY be working with one design.
-"""
-
 DOCUMENTATION_BUILD: bool = os.environ.get("PYANSYS_GEOMETRY_DOC_BUILD", "false").lower() == "true"
 """Global flag for the documentation to use the proper PyVista Jupyter backend."""
diff --git a/src/ansys/geometry/core/connection/client.py b/src/ansys/geometry/core/connection/client.py
index fe7a7484e8..a4e9509b2c 100644
--- a/src/ansys/geometry/core/connection/client.py
+++ b/src/ansys/geometry/core/connection/client.py
@@ -29,6 +29,7 @@
 import warnings
 
 from ansys.geometry.core.errors import protect_grpc
+from ansys.geometry.core.misc.checks import deprecated_method
 
 # TODO: Remove this context and filter once the protobuf UserWarning issue is downgraded to INFO
 # https://github.com/grpc/grpc/issues/37609
@@ -224,18 +225,6 @@ def __init__(
 
         # Store the backend type
         self._backend_type = backend_type
-        self._multiple_designs_allowed = (
-            False
-            if backend_type
-            in (
-                BackendType.DISCOVERY,
-                BackendType.LINUX_SERVICE,
-                BackendType.CORE_LINUX,
-                BackendType.CORE_WINDOWS,
-                BackendType.DISCOVERY_HEADLESS,
-            )
-            else True
-        )
 
         # retrieve the backend version
         if hasattr(grpc_backend_response, "version"):
@@ -277,15 +266,18 @@ def backend_version(self) -> semver.version.Version:
         return self._backend_version
 
     @property
+    @deprecated_method(info="Multiple designs for the same service are no longer supported.")
     def multiple_designs_allowed(self) -> bool:
         """Flag indicating whether multiple designs are allowed.
 
+        Deprecated since version 0.8.X.
+
         Notes
         -----
-        This method will return ``False`` if the backend type is ``Discovery`` or
-        ``Linux Service``. Otherwise, it will return ``True``.
+        Currently, only one design is allowed per service. This method will always
+        return ``False``.
         """
-        return self._multiple_designs_allowed
+        return False
 
     @property
     def channel(self) -> grpc.Channel:
diff --git a/src/ansys/geometry/core/designer/body.py b/src/ansys/geometry/core/designer/body.py
index 59dc835a16..2d9ff06484 100644
--- a/src/ansys/geometry/core/designer/body.py
+++ b/src/ansys/geometry/core/designer/body.py
@@ -83,7 +83,6 @@
 from ansys.geometry.core.misc.checks import (
     check_type,
     check_type_all_elements_in_iterable,
-    ensure_design_is_active,
     min_backend_version,
 )
 from ansys.geometry.core.misc.measurements import DEFAULT_UNITS, Angle, Distance
@@ -1438,7 +1437,6 @@ def parent_component(self) -> "Component":  # noqa: D102
 
     @property
     @protect_grpc
-    @ensure_design_is_active
     def faces(self) -> list[Face]:  # noqa: D102
         self._template._grpc_client.log.debug(f"Retrieving faces for body {self.id} from server.")
         grpc_faces = self._template._bodies_stub.GetFaces(EntityIdentifier(id=self.id))
@@ -1455,7 +1453,6 @@ def faces(self) -> list[Face]:  # noqa: D102
 
     @property
     @protect_grpc
-    @ensure_design_is_active
     def edges(self) -> list[Edge]:  # noqa: D102
         self._template._grpc_client.log.debug(f"Retrieving edges for body {self.id} from server.")
         grpc_edges = self._template._bodies_stub.GetEdges(EntityIdentifier(id=self.id))
@@ -1511,12 +1508,10 @@ def surface_offset(self) -> Union["MidSurfaceOffsetType", None]:  # noqa: D102
         return self._surface_offset
 
     @property
-    @ensure_design_is_active
     def volume(self) -> Quantity:  # noqa: D102
         return self._template.volume
 
     @property
-    @ensure_design_is_active
     def material(self) -> Material:  # noqa: D102
         return self._template.material
 
@@ -1524,26 +1519,21 @@ def material(self) -> Material:  # noqa: D102
     def material(self, value: Material):  # noqa: D102
         self._template.material = value
 
-    @ensure_design_is_active
     def assign_material(self, material: Material) -> None:  # noqa: D102
         self._template.assign_material(material)
 
-    @ensure_design_is_active
     def get_assigned_material(self) -> Material:  # noqa: D102
         return self._template.get_assigned_material()
 
-    @ensure_design_is_active
     def add_midsurface_thickness(self, thickness: Quantity) -> None:  # noqa: D102
         self._template.add_midsurface_thickness(thickness)
 
-    @ensure_design_is_active
     def add_midsurface_offset(  # noqa: D102
         self, offset: "MidSurfaceOffsetType"
     ) -> None:
         self._template.add_midsurface_offset(offset)
 
     @protect_grpc
-    @ensure_design_is_active
     def imprint_curves(  # noqa: D102
         self, faces: list[Face], sketch: Sketch
     ) -> tuple[list[Edge], list[Face]]:
@@ -1595,7 +1585,6 @@ def imprint_curves(  # noqa: D102
         return (new_edges, new_faces)
 
     @protect_grpc
-    @ensure_design_is_active
     def project_curves(  # noqa: D102
         self,
         direction: UnitVector3D,
@@ -1632,7 +1621,6 @@ def project_curves(  # noqa: D102
 
     @check_input_types
     @protect_grpc
-    @ensure_design_is_active
     def imprint_projected_curves(  # noqa: D102
         self,
         direction: UnitVector3D,
@@ -1667,29 +1655,23 @@ def imprint_projected_curves(  # noqa: D102
 
         return imprinted_faces
 
-    @ensure_design_is_active
     def set_name(self, name: str) -> None:  # noqa: D102
         return self._template.set_name(name)
 
-    @ensure_design_is_active
     def set_fill_style(self, fill_style: FillStyle) -> None:  # noqa: D102
         return self._template.set_fill_style(fill_style)
 
-    @ensure_design_is_active
     def set_suppressed(self, suppressed: bool) -> None:  # noqa: D102
         return self._template.set_suppressed(suppressed)
 
-    @ensure_design_is_active
     def set_color(self, color: str | tuple[float, float, float]) -> None:  # noqa: D102
         return self._template.set_color(color)
 
-    @ensure_design_is_active
     def translate(  # noqa: D102
         self, direction: UnitVector3D, distance: Quantity | Distance | Real
     ) -> None:
         return self._template.translate(direction, distance)
 
-    @ensure_design_is_active
     def rotate(  # noqa: D102
         self,
         axis_origin: Point3D,
@@ -1698,37 +1680,29 @@ def rotate(  # noqa: D102
     ) -> None:
         return self._template.rotate(axis_origin, axis_direction, angle)
 
-    @ensure_design_is_active
     def scale(self, value: Real) -> None:  # noqa: D102
         return self._template.scale(value)
 
-    @ensure_design_is_active
     def map(self, frame: Frame) -> None:  # noqa: D102
         return self._template.map(frame)
 
-    @ensure_design_is_active
     def mirror(self, plane: Plane) -> None:  # noqa: D102
         return self._template.mirror(plane)
 
-    @ensure_design_is_active
     def get_collision(self, body: "Body") -> CollisionType:  # noqa: D102
         return self._template.get_collision(body)
 
-    @ensure_design_is_active
     def copy(self, parent: "Component", name: str = None) -> "Body":  # noqa: D102
         return self._template.copy(parent, name)
 
-    @ensure_design_is_active
     def tessellate(  # noqa: D102
         self, merge: bool = False
     ) -> Union["PolyData", "MultiBlock"]:
         return self._template.tessellate(merge, self.parent_component.get_world_transform())
 
-    @ensure_design_is_active
     def shell_body(self, offset: Real) -> bool:  # noqa: D102
         return self._template.shell_body(offset)
 
-    @ensure_design_is_active
     def remove_faces(self, selection: Face | Iterable[Face], offset: Real) -> bool:  # noqa: D102
         return self._template.remove_faces(selection, offset)
 
@@ -1787,7 +1761,6 @@ def unite(self, other: Union["Body", Iterable["Body"]], keep_other: bool = False
 
     @protect_grpc
     @reset_tessellation_cache
-    @ensure_design_is_active
     @check_input_types
     def __generic_boolean_command(
         self,
@@ -1840,7 +1813,6 @@ def __generic_boolean_command(
 
     @protect_grpc
     @reset_tessellation_cache
-    @ensure_design_is_active
     @check_input_types
     def __generic_boolean_op(
         self,
diff --git a/src/ansys/geometry/core/designer/component.py b/src/ansys/geometry/core/designer/component.py
index ad53f3967e..64988d65ad 100644
--- a/src/ansys/geometry/core/designer/component.py
+++ b/src/ansys/geometry/core/designer/component.py
@@ -75,7 +75,7 @@
 from ansys.geometry.core.math.matrix import Matrix44
 from ansys.geometry.core.math.point import Point3D
 from ansys.geometry.core.math.vector import UnitVector3D, Vector3D
-from ansys.geometry.core.misc.checks import ensure_design_is_active, min_backend_version
+from ansys.geometry.core.misc.checks import min_backend_version
 from ansys.geometry.core.misc.measurements import DEFAULT_UNITS, Angle, Distance
 from ansys.geometry.core.shapes.curves.circle import Circle
 from ansys.geometry.core.shapes.curves.trimmed_curve import TrimmedCurve
@@ -358,7 +358,6 @@ def get_world_transform(self) -> Matrix44:
         return self.parent_component.get_world_transform() * self._master_component.transform
 
     @protect_grpc
-    @ensure_design_is_active
     def modify_placement(
         self,
         translation: Vector3D | None = None,
@@ -416,7 +415,6 @@ def reset_placement(self):
         self.modify_placement()
 
     @check_input_types
-    @ensure_design_is_active
     def add_component(
         self, name: str, template: Optional["Component"] = None, instance_name: str = None
     ) -> "Component":
@@ -460,7 +458,6 @@ def add_component(
 
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     def set_shared_topology(self, share_type: SharedTopologyType) -> None:
         """Set the shared topology to apply to the component.
 
@@ -482,7 +479,6 @@ def set_shared_topology(self, share_type: SharedTopologyType) -> None:
 
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     def extrude_sketch(
         self,
         name: str,
@@ -567,7 +563,6 @@ def extrude_sketch(
     @min_backend_version(24, 2, 0)
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     def sweep_sketch(
         self,
         name: str,
@@ -617,7 +612,6 @@ def sweep_sketch(
     @min_backend_version(24, 2, 0)
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     def sweep_chain(
         self,
         name: str,
@@ -717,7 +711,6 @@ def revolve_sketch(
 
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     def extrude_face(
         self,
         name: str,
@@ -780,7 +773,6 @@ def extrude_face(
 
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     @min_backend_version(24, 2, 0)
     def create_sphere(self, name: str, center: Point3D, radius: Distance) -> Body:
         """Create a sphere body defined by the center point and the radius.
@@ -814,7 +806,6 @@ def create_sphere(self, name: str, center: Point3D, radius: Distance) -> Body:
 
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     @min_backend_version(24, 2, 0)
     def create_body_from_loft_profile(
         self,
@@ -881,7 +872,6 @@ def create_body_from_loft_profile(
 
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     def create_surface(self, name: str, sketch: Sketch) -> Body:
         """Create a surface body with a sketch profile.
 
@@ -919,7 +909,6 @@ def create_surface(self, name: str, sketch: Sketch) -> Body:
 
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     def create_surface_from_face(self, name: str, face: Face) -> Body:
         """Create a surface body based on a face.
 
@@ -960,7 +949,6 @@ def create_surface_from_face(self, name: str, face: Face) -> Body:
 
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     @min_backend_version(25, 1, 0)
     def create_body_from_surface(self, name: str, trimmed_surface: TrimmedSurface) -> Body:
         """Create a surface body from a trimmed surface.
@@ -1036,7 +1024,6 @@ def create_surface_from_trimmed_curves(
         return Body(response.id, response.name, self, tb)
 
     @check_input_types
-    @ensure_design_is_active
     def create_coordinate_system(self, name: str, frame: Frame) -> CoordinateSystem:
         """Create a coordinate system.
 
@@ -1059,7 +1046,6 @@ def create_coordinate_system(self, name: str, frame: Frame) -> CoordinateSystem:
 
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     def translate_bodies(
         self, bodies: list[Body], direction: UnitVector3D, distance: Quantity | Distance | Real
     ) -> None:
@@ -1111,7 +1097,6 @@ def translate_bodies(
 
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     def create_beams(
         self, segments: list[tuple[Point3D, Point3D]], profile: BeamProfile
     ) -> list[Beam]:
@@ -1172,7 +1157,6 @@ def create_beam(self, start: Point3D, end: Point3D, profile: BeamProfile) -> Bea
 
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     def delete_component(self, component: Union["Component", str]) -> None:
         """Delete a component (itself or its children).
 
@@ -1207,7 +1191,6 @@ def delete_component(self, component: Union["Component", str]) -> None:
 
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     def delete_body(self, body: Body | str) -> None:
         """Delete a body belonging to this component (or its children).
 
@@ -1259,7 +1242,6 @@ def add_design_point(
 
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     def add_design_points(
         self,
         name: str,
@@ -1295,7 +1277,6 @@ def add_design_points(
 
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     def delete_beam(self, beam: Beam | str) -> None:
         """Delete an existing beam belonging to this component's scope.
 
diff --git a/src/ansys/geometry/core/designer/design.py b/src/ansys/geometry/core/designer/design.py
index 32f16b6312..5ea669f45f 100644
--- a/src/ansys/geometry/core/designer/design.py
+++ b/src/ansys/geometry/core/designer/design.py
@@ -78,7 +78,7 @@
 from ansys.geometry.core.math.plane import Plane
 from ansys.geometry.core.math.point import Point3D
 from ansys.geometry.core.math.vector import UnitVector3D, Vector3D
-from ansys.geometry.core.misc.checks import ensure_design_is_active, min_backend_version
+from ansys.geometry.core.misc.checks import min_backend_version
 from ansys.geometry.core.misc.measurements import DEFAULT_UNITS, Distance
 from ansys.geometry.core.modeler import Modeler
 from ansys.geometry.core.parameters.parameter import Parameter, ParameterUpdateStatus
@@ -212,10 +212,6 @@ def close(self) -> None:
     @protect_grpc
     def _activate(self, called_after_design_creation: bool = False) -> None:
         """Activate the design."""
-        # Deactivate all designs first
-        for design in self._modeler._designs.values():
-            design._is_active = False
-
         # Activate the current design
         if not called_after_design_creation:
             self._design_stub.PutActive(EntityIdentifier(id=self._design_id))
@@ -226,7 +222,6 @@ def _activate(self, called_after_design_creation: bool = False) -> None:
     # https://github.com/ansys/pyansys-geometry/issues/1319
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     def add_material(self, material: Material) -> None:
         """Add a material to the design.
 
@@ -259,7 +254,6 @@ def add_material(self, material: Material) -> None:
 
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     def save(self, file_location: Path | str) -> None:
         """Save a design to disk on the active Geometry server instance.
 
@@ -277,7 +271,6 @@ def save(self, file_location: Path | str) -> None:
 
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     def download(
         self,
         file_location: Path | str,
@@ -640,7 +633,6 @@ def export_to_pmdb(self, location: Path | str | None = None) -> Path:
         return file_location
 
     @check_input_types
-    @ensure_design_is_active
     def create_named_selection(
         self,
         name: str,
@@ -691,7 +683,6 @@ def create_named_selection(
 
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     def delete_named_selection(self, named_selection: NamedSelection | str) -> None:
         """Delete a named selection on the active Geometry server instance.
 
@@ -722,7 +713,6 @@ def delete_named_selection(self, named_selection: NamedSelection | str) -> None:
             pass
 
     @check_input_types
-    @ensure_design_is_active
     def delete_component(self, component: Union["Component", str]) -> None:
         """Delete a component (itself or its children).
 
@@ -764,7 +754,6 @@ def set_shared_topology(self, share_type: SharedTopologyType) -> None:
 
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     def add_beam_circular_profile(
         self,
         name: str,
@@ -858,7 +847,6 @@ def set_parameter(self, dimension: Parameter) -> ParameterUpdateStatus:
 
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     def add_midsurface_thickness(self, thickness: Quantity, bodies: list[Body]) -> None:
         """Add a mid-surface thickness to a list of bodies.
 
@@ -898,7 +886,6 @@ def add_midsurface_thickness(self, thickness: Quantity, bodies: list[Body]) -> N
 
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     def add_midsurface_offset(self, offset_type: MidSurfaceOffsetType, bodies: list[Body]) -> None:
         """Add a mid-surface offset type to a list of bodies.
 
@@ -936,7 +923,6 @@ def add_midsurface_offset(self, offset_type: MidSurfaceOffsetType, bodies: list[
 
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     def delete_beam_profile(self, beam_profile: BeamProfile | str) -> None:
         """Remove a beam profile on the active geometry server instance.
 
@@ -961,7 +947,6 @@ def delete_beam_profile(self, beam_profile: BeamProfile | str) -> None:
 
     @protect_grpc
     @check_input_types
-    @ensure_design_is_active
     @min_backend_version(24, 2, 0)
     def insert_file(self, file_location: Path | str) -> Component:
         """Insert a file into the design.
@@ -1199,13 +1184,5 @@ def _update_design_inplace(self) -> None:
         self._named_selections = {}
         self._coordinate_systems = {}
 
-        # Get the previous design id
-        previous_design_id = self._design_id
-
         # Read the existing design
         self.__read_existing_design()
-
-        # If the design id has changed, update the design id in the Modeler
-        if previous_design_id != self._design_id:
-            self._modeler._designs[self._design_id] = self
-            self._modeler._designs.pop(previous_design_id)
diff --git a/src/ansys/geometry/core/designer/edge.py b/src/ansys/geometry/core/designer/edge.py
index 3b67b9c06d..9e09f1483e 100644
--- a/src/ansys/geometry/core/designer/edge.py
+++ b/src/ansys/geometry/core/designer/edge.py
@@ -32,7 +32,7 @@
 from ansys.geometry.core.connection.conversions import grpc_curve_to_curve
 from ansys.geometry.core.errors import GeometryRuntimeError, protect_grpc
 from ansys.geometry.core.math.point import Point3D
-from ansys.geometry.core.misc.checks import ensure_design_is_active, min_backend_version
+from ansys.geometry.core.misc.checks import min_backend_version
 from ansys.geometry.core.misc.measurements import DEFAULT_UNITS
 from ansys.geometry.core.shapes.curves.trimmed_curve import ReversedTrimmedCurve, TrimmedCurve
 from ansys.geometry.core.shapes.parameterization import Interval
@@ -112,7 +112,6 @@ def is_reversed(self) -> bool:
 
     @property
     @protect_grpc
-    @ensure_design_is_active
     @min_backend_version(24, 2, 0)
     def shape(self) -> TrimmedCurve:
         """Underlying trimmed curve of the edge.
@@ -145,7 +144,6 @@ def shape(self) -> TrimmedCurve:
 
     @property
     @protect_grpc
-    @ensure_design_is_active
     def length(self) -> Quantity:
         """Calculated length of the edge."""
         try:
@@ -163,7 +161,6 @@ def curve_type(self) -> CurveType:
 
     @property
     @protect_grpc
-    @ensure_design_is_active
     def faces(self) -> list["Face"]:
         """Faces that contain the edge."""
         from ansys.geometry.core.designer.face import Face, SurfaceType
@@ -183,7 +180,6 @@ def faces(self) -> list["Face"]:
 
     @property
     @protect_grpc
-    @ensure_design_is_active
     def start(self) -> Point3D:
         """Start point of the edge."""
         try:
@@ -196,7 +192,6 @@ def start(self) -> Point3D:
 
     @property
     @protect_grpc
-    @ensure_design_is_active
     def end(self) -> Point3D:
         """End point of the edge."""
         try:
diff --git a/src/ansys/geometry/core/designer/face.py b/src/ansys/geometry/core/designer/face.py
index b437a49123..6bf50fbc5f 100644
--- a/src/ansys/geometry/core/designer/face.py
+++ b/src/ansys/geometry/core/designer/face.py
@@ -45,7 +45,6 @@
 from ansys.geometry.core.math.vector import UnitVector3D
 from ansys.geometry.core.misc.checks import (
     deprecated_method,
-    ensure_design_is_active,
     min_backend_version,
 )
 from ansys.geometry.core.misc.measurements import DEFAULT_UNITS
@@ -204,7 +203,6 @@ def body(self) -> "Body":
 
     @property
     @protect_grpc
-    @ensure_design_is_active
     @min_backend_version(24, 2, 0)
     def shape(self) -> TrimmedSurface:
         """Underlying trimmed surface of the face.
@@ -234,7 +232,6 @@ def surface_type(self) -> SurfaceType:
 
     @property
     @protect_grpc
-    @ensure_design_is_active
     def area(self) -> Quantity:
         """Calculated area of the face."""
         self._grpc_client.log.debug("Requesting face area from server.")
@@ -243,7 +240,6 @@ def area(self) -> Quantity:
 
     @property
     @protect_grpc
-    @ensure_design_is_active
     def edges(self) -> list[Edge]:
         """List of all edges of the face."""
         self._grpc_client.log.debug("Requesting face edges from server.")
@@ -252,7 +248,6 @@ def edges(self) -> list[Edge]:
 
     @property
     @protect_grpc
-    @ensure_design_is_active
     def loops(self) -> list[FaceLoop]:
         """List of all loops of the face."""
         self._grpc_client.log.debug("Requesting face loops from server.")
@@ -288,7 +283,6 @@ def loops(self) -> list[FaceLoop]:
         return loops
 
     @protect_grpc
-    @ensure_design_is_active
     def normal(self, u: float = 0.5, v: float = 0.5) -> UnitVector3D:
         """Get the normal direction to the face at certain UV coordinates.
 
@@ -349,7 +343,6 @@ def face_normal(self, u: float = 0.5, v: float = 0.5) -> UnitVector3D:  # [depre
         return self.normal(u, v)
 
     @protect_grpc
-    @ensure_design_is_active
     def point(self, u: float = 0.5, v: float = 0.5) -> Point3D:
         """Get a point of the face evaluated at certain UV coordinates.
 
@@ -434,7 +427,6 @@ def __grpc_edges_to_edges(self, edges_grpc: list[GRPCEdge]) -> list[Edge]:
         return edges
 
     @protect_grpc
-    @ensure_design_is_active
     def create_isoparametric_curves(
         self, use_u_param: bool, parameter: float
     ) -> list[TrimmedCurve]:
diff --git a/src/ansys/geometry/core/misc/checks.py b/src/ansys/geometry/core/misc/checks.py
index b5bc5f6bc9..42ab7d8289 100644
--- a/src/ansys/geometry/core/misc/checks.py
+++ b/src/ansys/geometry/core/misc/checks.py
@@ -30,64 +30,7 @@
 import semver
 
 if TYPE_CHECKING:  # pragma: no cover
-    from ansys.geometry.core.designer.design import Design
-
-
-def ensure_design_is_active(method):
-    """Make sure that the design is active before executing a method.
-
-    This function is necessary to be called whenever we do any operation
-    on the design. If we are just accessing information of the class, it
-    is not necessary to call this.
-    """
-
-    def wrapper(self, *args, **kwargs):
-        import ansys.geometry.core as pyansys_geometry
-        from ansys.geometry.core.errors import GeometryRuntimeError
-
-        if pyansys_geometry.DISABLE_MULTIPLE_DESIGN_CHECK:
-            # If the user has disabled the check, then we can skip it
-            return method(self, *args, **kwargs)
-
-        # Check if the current design is active... otherwise activate it
-        def get_design_ref(obj) -> "Design":
-            if hasattr(obj, "_modeler"):  # In case of a Design object
-                return obj
-            elif hasattr(
-                obj, "_parent_component"
-            ):  # In case of a Body, Component, DesignPoint, Beam
-                # Recursive call
-                return get_design_ref(obj._parent_component)
-            elif hasattr(obj, "_body"):  # In case of a Face, Edge
-                # Recursive call
-                return get_design_ref(obj._body._parent_component)
-            else:
-                raise ValueError("Unable to find the design reference.")
-
-        # Get the design reference
-        design = get_design_ref(self)
-
-        # Verify whether the Design has been closed on the backend
-        if design.is_closed:
-            raise GeometryRuntimeError(
-                "The design has been closed on the backend. Cannot perform any operations on it."
-            )
-
-        # Activate the design if it is not active
-        if not design.is_active:
-            # First, check the backend allows for multiple documents
-            if not design._grpc_client.multiple_designs_allowed:
-                raise GeometryRuntimeError(
-                    "The design is not active and multiple designs are "
-                    "not allowed with the current backend."
-                )
-            else:
-                design._activate()
-
-        # Finally, call method
-        return method(self, *args, **kwargs)
-
-    return wrapper
+    pass
 
 
 def check_is_float_int(param: object, param_name: str | None = None) -> None:
diff --git a/src/ansys/geometry/core/modeler.py b/src/ansys/geometry/core/modeler.py
index 288f4abf97..4e9fa5f8ec 100644
--- a/src/ansys/geometry/core/modeler.py
+++ b/src/ansys/geometry/core/modeler.py
@@ -37,8 +37,7 @@
 from ansys.geometry.core.connection.client import GrpcClient
 from ansys.geometry.core.connection.defaults import DEFAULT_HOST, DEFAULT_PORT
 from ansys.geometry.core.errors import GeometryRuntimeError, protect_grpc
-from ansys.geometry.core.logger import LOG
-from ansys.geometry.core.misc.checks import check_type, min_backend_version
+from ansys.geometry.core.misc.checks import check_type, deprecated_method, min_backend_version
 from ansys.geometry.core.misc.options import ImportOptions
 from ansys.geometry.core.tools.measurement_tools import MeasurementTools
 from ansys.geometry.core.tools.prepare_tools import PrepareTools
@@ -120,15 +119,15 @@ def __init__(
             backend_type=backend_type,
         )
 
-        # Maintaining references to all designs within the modeler workspace
-        self._designs: dict[str, "Design"] = {}
+        # Single design for the Modeler
+        self._design: Optional["Design"] = None
 
         # Initialize the RepairTools - Not available on Linux
         # TODO: delete "if" when Linux service is able to use repair tools
         # https://github.com/ansys/pyansys-geometry/issues/1319
         if BackendType.is_core_service(self.client.backend_type):
             self._measurement_tools = None
-            LOG.warning("CoreService backend does not support measurement tools.")
+            self.client.log.warning("CoreService backend does not support measurement tools.")
         else:
             self._measurement_tools = MeasurementTools(self._grpc_client)
 
@@ -138,28 +137,26 @@ def __init__(
         self._geometry_commands = GeometryCommands(self._grpc_client)
         self._unsupported = UnsupportedCommands(self._grpc_client, self)
 
-        # Check if the backend allows for multiple designs and throw warning if needed
-        if not self.client.multiple_designs_allowed:
-            LOG.warning(
-                "Linux and Ansys Discovery backends do not support multiple "
-                "designs open in the same session. Only the last design created "
-                "will be available to perform modeling operations."
-            )
-
     @property
     def client(self) -> GrpcClient:
         """``Modeler`` instance client."""
         return self._grpc_client
 
     @property
+    def design(self) -> "Design":
+        """Retrieve the design within the modeler workspace."""
+        return self._design
+
+    @property
+    @deprecated_method(alternative="design")
     def designs(self) -> dict[str, "Design"]:
-        """All designs within the modeler workspace.
+        """Retrieve the design within the modeler workspace.
 
         Notes
         -----
-        This property is read-only. **DO NOT** modify the dictionary.
+        This method is deprecated. Use the :func:`design` property instead.
         """
-        return self._designs
+        return {self._design.id: self._design}
 
     def create_design(self, name: str) -> "Design":
         """Initialize a new design with the connected client.
@@ -177,14 +174,20 @@ def create_design(self, name: str) -> "Design":
         from ansys.geometry.core.designer.design import Design
 
         check_type(name, str)
+
+        # If a previous design was available... inform the user that it will be deleted
+        # when creating a new design.
+        if self._design is not None and self._design.is_active:
+            self.client.log.warning("Closing previous design before creating a new one.")
+            self._design.close()
+
+        # Create the new design
         design = Design(name, self)
-        self._designs[design.design_id] = design
-        if len(self._designs) > 1:
-            LOG.warning(
-                "Some backends only support one design. "
-                + "Previous designs may be deleted (on the service) when creating a new one."
-            )
-        return self._designs[design.design_id]
+
+        # Update the design stored in the modeler
+        self._design = design
+
+        return self._design
 
     def get_active_design(self, sync_with_backend: bool = True) -> "Design":
         """Get the active design on the modeler object.
@@ -201,14 +204,13 @@ def get_active_design(self, sync_with_backend: bool = True) -> "Design":
         Design
             Design object already existing on the modeler.
         """
-        for _, design in self._designs.items():
-            if design._is_active:
-                # Check if sync_with_backend is requested
-                if sync_with_backend:
-                    design._update_design_inplace()
-
-                # Return the active design
-                return design
+        if self._design is not None and self._design.is_active:
+            # Check if sync_with_backend is requested
+            if sync_with_backend:
+                self._design._update_design_inplace()
+            return self._design
+        else:
+            self.client.log.warning("No active design available.")
 
         return None
 
@@ -222,43 +224,39 @@ def read_existing_design(self) -> "Design":
         """
         from ansys.geometry.core.designer.design import Design
 
-        design = Design("", self, read_existing_design=True)
-        self._designs[design.design_id] = design
-        if len(self._designs) > 1:
-            LOG.warning(
-                "Some backends only support one design. "
-                + "Previous designs may be deleted (on the service) when reading a new one."
-            )
-        return self._designs[design.design_id]
+        self._design = Design("", self, read_existing_design=True)
+
+        return self._design
 
-    def close(self, close_designs: bool = True) -> None:
+    def close(self, close_design: bool = True) -> None:
         """Access the client's close method.
 
         Parameters
         ----------
-        close_designs : bool, default: True
-            Whether to close all designs before closing the client.
+        close_design : bool, default: True
+            Whether to close the design before closing the client.
         """
-        # Close all designs (if requested)
-        [design.close() for design in self._designs.values() if close_designs]
+        # Close design (if requested)
+        if close_design and self._design is not None:
+            self._design.close()
 
         # Close the client
         self.client.close()
 
-    def exit(self, close_designs: bool = True) -> None:
+    def exit(self, close_design: bool = True) -> None:
         """Access the client's close method.
 
         Parameters
         ----------
-        close_designs : bool, default: True
-            Whether to close all designs before closing the client.
+        close_design : bool, default: True
+            Whether to close the design before closing the client.
 
         Notes
         -----
         This method is calling the same method as
         :func:`close() <ansys.geometry.core.modeler.Modeler.close>`.
         """
-        self.close(close_designs=close_designs)
+        self.close(close_design=close_design)
 
     def _upload_file(
         self,
@@ -301,7 +299,7 @@ def _upload_file(
         with fp_path.open(mode="rb") as file:
             data = file.read()
 
-        c_stub = CommandsStub(self._grpc_client.channel)
+        c_stub = CommandsStub(self.client.channel)
 
         response = c_stub.UploadFile(
             UploadFileRequest(
@@ -361,7 +359,7 @@ def open_file(
                         self._upload_file(full_path)
             self._upload_file(file_path, True, import_options)
         else:
-            DesignsStub(self._grpc_client.channel).Open(
+            DesignsStub(self.client.channel).Open(
                 OpenRequest(filepath=file_path, import_options=import_options.to_dict())
             )
 
@@ -372,7 +370,7 @@ def __repr__(self) -> str:
         lines = []
         lines.append(f"Ansys Geometry Modeler ({hex(id(self))})")
         lines.append("")
-        lines.append(str(self._grpc_client))
+        lines.append(str(self.client))
         return "\n".join(lines)
 
     @protect_grpc
@@ -468,7 +466,7 @@ def run_discovery_script_file(
                 api_version = ApiVersions.parse_input(api_version)
 
         serv_path = self._upload_file(file_path)
-        ga_stub = DbuApplicationStub(self._grpc_client.channel)
+        ga_stub = DbuApplicationStub(self.client.channel)
         request = RunScriptFileRequest(
             script_path=serv_path,
             script_args=script_args,
diff --git a/tests/integration/conftest.py b/tests/integration/conftest.py
index 102a53851a..69f4634a85 100644
--- a/tests/integration/conftest.py
+++ b/tests/integration/conftest.py
@@ -162,10 +162,7 @@ def modeler(session_modeler: Modeler):
     yield session_modeler
 
     # Cleanup on exit
-    [design.close() for design in session_modeler.designs.values()]
-
-    # Empty the designs dictionary
-    session_modeler._designs = {}
+    session_modeler.design.close()
 
 
 @pytest.fixture(scope="session", autouse=True)
diff --git a/tests/integration/test_design.py b/tests/integration/test_design.py
index 51d2281f68..af1f85d30a 100644
--- a/tests/integration/test_design.py
+++ b/tests/integration/test_design.py
@@ -1986,18 +1986,13 @@ def test_child_component_instances(modeler: Modeler):
 
 
 def test_multiple_designs(modeler: Modeler, tmp_path_factory: pytest.TempPathFactory):
-    """Generate multiple designs, make sure they are all separate, and activate
-    them when needed.
+    """Generate multiple designs, make sure they are all separate, and once
+    a design is deactivated, the next one is activated.
     """
-    # Check backend first
-    if modeler.client.backend_type in (
-        BackendType.SPACECLAIM,
-        BackendType.WINDOWS_SERVICE,
-    ):
-        pass
-    else:
-        # Test is only available for DMS and SpaceClaim
-        pytest.skip("Test only available on DMS and SpaceClaim")
+    # Initiate expected output images
+    scshot_dir = tmp_path_factory.mktemp("test_multiple_designs")
+    scshot_1 = scshot_dir / "design1.png"
+    scshot_2 = scshot_dir / "design2.png"
 
     # Create your design on the server side
     design1 = modeler.create_design("Design1")
@@ -2009,6 +2004,9 @@ def test_multiple_designs(modeler: Modeler, tmp_path_factory: pytest.TempPathFac
     # Extrude the sketch to create a body
     design1.extrude_sketch("MySlot", sketch1, Quantity(10, UNITS.mm))
 
+    # Request plotting and store images
+    design1.plot(screenshot=scshot_1)
+
     # Create a second design
     design2 = modeler.create_design("Design2")
 
@@ -2019,14 +2017,8 @@ def test_multiple_designs(modeler: Modeler, tmp_path_factory: pytest.TempPathFac
     # Extrude the sketch to create a body
     design2.extrude_sketch("MyRectangle", sketch2, Quantity(10, UNITS.mm))
 
-    # Initiate expected output images
-    scshot_dir = tmp_path_factory.mktemp("test_multiple_designs")
-    scshot_1 = scshot_dir / "design1.png"
-    scshot_2 = scshot_dir / "design2.png"
-
     # Request plotting and store images
-    design2.plot(screenshot=scshot_1)
-    design1.plot(screenshot=scshot_2)
+    design2.plot(screenshot=scshot_2)
 
     # Check that the images are different
     assert scshot_1.exists()
@@ -2034,13 +2026,9 @@ def test_multiple_designs(modeler: Modeler, tmp_path_factory: pytest.TempPathFac
     err = pv_compare_images(str(scshot_1), str(scshot_2))
     assert not err < 0.1
 
-    # Check that design2 is not active
-    assert not design2.is_active
-    assert design1.is_active
-
-    # Check the same thing inside the modeler
-    assert not modeler.designs[design2.design_id].is_active
-    assert modeler.designs[design1.design_id].is_active
+    # Check that design1 is not active and design2 is active
+    assert not design1.is_active
+    assert design2.is_active
 
 
 def test_get_active_design(modeler: Modeler):