diff --git a/stock_helper/__init__.py b/stock_helper/__init__.py
new file mode 100644
index 000000000..0650744f6
--- /dev/null
+++ b/stock_helper/__init__.py
@@ -0,0 +1 @@
+from . import models
diff --git a/stock_helper/__manifest__.py b/stock_helper/__manifest__.py
new file mode 100644
index 000000000..6473fbf35
--- /dev/null
+++ b/stock_helper/__manifest__.py
@@ -0,0 +1,15 @@
+# Copyright 2020-2021 Camptocamp SA
+# License LGPL-3.0 or later (http://www.gnu.org/licenses/lgpl.html).
+
+{
+    "name": "Stock Move Helpers",
+    "summary": "Add methods shared between various stock modules",
+    "version": "13.0.1.1.0",
+    "author": "Camptocamp, Odoo Community Association (OCA)",
+    "website": "https://github.com/OCA/stock-logistics-warehouse",
+    "category": "Hidden",
+    "depends": ["stock"],
+    "data": [],
+    "installable": True,
+    "license": "LGPL-3",
+}
diff --git a/stock_helper/models/__init__.py b/stock_helper/models/__init__.py
new file mode 100644
index 000000000..88493e35d
--- /dev/null
+++ b/stock_helper/models/__init__.py
@@ -0,0 +1 @@
+from . import stock_location
diff --git a/stock_helper/models/stock_location.py b/stock_helper/models/stock_location.py
new file mode 100644
index 000000000..cad6d288c
--- /dev/null
+++ b/stock_helper/models/stock_location.py
@@ -0,0 +1,20 @@
+# Copyright 2020-2021 Camptocamp SA (http://www.camptocamp.com)
+# License LGPL-3.0 or later (http://www.gnu.org/licenses/lgpl.html).
+
+from odoo import models
+
+
+class StockLocation(models.Model):
+    _inherit = "stock.location"
+
+    def is_sublocation_of(self, others, func=any):
+        """Return True if self is a sublocation of others (or equal)
+
+        By default, it return True if any other is a parent or equal.
+        ``all`` can be passed to ``func`` to require all the other locations
+        to be parent or equal to be True.
+        """
+        self.ensure_one()
+        # Efficient way to verify that the current location is
+        # below one of the other location without using SQL.
+        return func(self.parent_path.startswith(other.parent_path) for other in others)
diff --git a/stock_helper/readme/CONTRIBUTORS.rst b/stock_helper/readme/CONTRIBUTORS.rst
new file mode 100644
index 000000000..48286263c
--- /dev/null
+++ b/stock_helper/readme/CONTRIBUTORS.rst
@@ -0,0 +1 @@
+* Guewen Baconnier <guewen.baconnier@camptocamp.com>
diff --git a/stock_helper/readme/DESCRIPTION.rst b/stock_helper/readme/DESCRIPTION.rst
new file mode 100644
index 000000000..198d259e3
--- /dev/null
+++ b/stock_helper/readme/DESCRIPTION.rst
@@ -0,0 +1 @@
+Add methods to be used by other modules. This is not a functional module.
diff --git a/stock_helper/tests/__init__.py b/stock_helper/tests/__init__.py
new file mode 100644
index 000000000..e67580e62
--- /dev/null
+++ b/stock_helper/tests/__init__.py
@@ -0,0 +1 @@
+from . import test_location_is_sublocation_of
diff --git a/stock_helper/tests/common.py b/stock_helper/tests/common.py
new file mode 100644
index 000000000..871a216ad
--- /dev/null
+++ b/stock_helper/tests/common.py
@@ -0,0 +1,19 @@
+# Copyright 2020-2021 Camptocamp SA
+# License LGPL-3.0 or later (http://www.gnu.org/licenses/lgpl.html).
+
+from odoo.tests import SavepointCase
+
+
+class StockHelperCommonCase(SavepointCase):
+    @classmethod
+    def setUpClass(cls):
+        super().setUpClass()
+        cls.env = cls.env(context=dict(cls.env.context, tracking_disable=True))
+
+        cls.wh = cls.env.ref("stock.warehouse0")
+
+        cls.customer_loc = cls.env.ref("stock.stock_location_customers")
+        cls.supplier_loc = cls.env.ref("stock.stock_location_suppliers")
+        cls.stock_loc = cls.wh.lot_stock_id
+        cls.shelf1_loc = cls.env.ref("stock.stock_location_components")
+        cls.shelf2_loc = cls.env.ref("stock.stock_location_14")
diff --git a/stock_helper/tests/test_location_is_sublocation_of.py b/stock_helper/tests/test_location_is_sublocation_of.py
new file mode 100644
index 000000000..f88047727
--- /dev/null
+++ b/stock_helper/tests/test_location_is_sublocation_of.py
@@ -0,0 +1,48 @@
+# Copyright 2020-2021 Camptocamp SA
+# License LGPL-3.0 or later (http://www.gnu.org/licenses/lgpl.html).
+
+
+from .common import StockHelperCommonCase
+
+
+class TestStockLocationIsSublocationOf(StockHelperCommonCase):
+    def test_is_sublocation_of_equal(self):
+        self.assertTrue(self.shelf1_loc.is_sublocation_of(self.shelf1_loc))
+
+    def test_is_sublocation_of_equal_child_ko(self):
+        bin_loc = self.env["stock.location"].create(
+            {"name": "bin", "location_id": self.shelf1_loc.id}
+        )
+        self.assertFalse(self.shelf1_loc.is_sublocation_of(bin_loc))
+
+    def test_is_sublocation_of_equal_child_sibling(self):
+        self.assertFalse(self.shelf1_loc.is_sublocation_of(self.shelf2_loc))
+
+    def test_is_sublocation_of_any_ok(self):
+        self.assertTrue(
+            self.shelf1_loc.is_sublocation_of(self.stock_loc | self.customer_loc)
+        )
+
+    def test_is_sublocation_of_any_ko(self):
+        self.assertFalse(
+            self.shelf1_loc.is_sublocation_of(self.supplier_loc | self.customer_loc)
+        )
+
+    def test_is_sublocation_of_all_ok(self):
+        self.assertTrue(
+            self.shelf1_loc.is_sublocation_of(
+                self.stock_loc | self.stock_loc.location_id, func=all
+            )
+        )
+
+    def test_is_sublocation_of_all_ko(self):
+        self.assertFalse(
+            self.shelf1_loc.is_sublocation_of(
+                self.stock_loc | self.customer_loc, func=all
+            )
+        )
+        self.assertFalse(
+            self.shelf1_loc.is_sublocation_of(
+                self.supplier_loc | self.customer_loc, func=all
+            )
+        )