diff --git a/src/config/constants.js b/src/config/constants.js
index 6ccf7a5..8e66871 100644
--- a/src/config/constants.js
+++ b/src/config/constants.js
@@ -12,6 +12,17 @@ const UserActions = [
   "Receive",
 ];
 
+const LevelPositions = [
+  "LDB",
+  "LDF",
+  "LUB",
+  "LUF",
+  "RDB",
+  "RDF",
+  "RUB",
+  "RUF",
+];
+
 const InventoryScopes = ["Inventory", "Material", "Item"];
 
 const WarehouseScopes = [
@@ -40,6 +51,8 @@ const CustomAttributeTypes = [
   "Enumerable",
 ];
 
+const SublevelInventoryTypes = ["Inventory", "Material", "Item"];
+
 const AUTHENTICATION_FAILURE_ERROR_MESSAGE = "Authentication Failed!";
 const AUTHORIZATION_FAILURE_ERROR_MESSAGE =
   "User not permitted due to lack of access!";
@@ -52,7 +65,9 @@ module.exports = {
   WarehouseScopes,
   InventoryTypes,
   CustomAttributeTypes,
+  SublevelInventoryTypes,
   SubLevelTypes,
+  LevelPositions,
   SUPER_ADMIN_ROLE: "super-admin",
   COMPANY_ADMIN_ROLE: "company-admin",
   WAREHOUSE_ADMIN_ROLE: "warehouse-admin",
diff --git a/src/controller/index.js b/src/controller/index.js
index 82baf2a..b8183d3 100644
--- a/src/controller/index.js
+++ b/src/controller/index.js
@@ -11,6 +11,7 @@ const areaRouter = require("./area.router");
 const bayRouter = require("./bay.router");
 const rowRouter = require("./row.router");
 const levelRouter = require("./level.router");
+const sublevelRouter = require("./sublevel.router");
 const dashboardRouter = require("./dashboard.router");
 
 router.use("/user-role", AuthenticateMiddleware, userRoleRouter);
@@ -23,6 +24,7 @@ router.use("/area", areaRouter);
 router.use("/bay", bayRouter);
 router.use("/row", rowRouter);
 router.use("/level", levelRouter);
+router.use("/sublevel", sublevelRouter);
 router.use("/dashboard", dashboardRouter);
 
 router.get("/", (req, res) => {
diff --git a/src/controller/sublevel.controller.js b/src/controller/sublevel.controller.js
new file mode 100644
index 0000000..a62b36b
--- /dev/null
+++ b/src/controller/sublevel.controller.js
@@ -0,0 +1,154 @@
+const Sublevel = require("../models/Sublevel");
+const mongoose = require("mongoose");
+const { addSublevelToParent, deleteSubLevelTreeFromRoot, validPositions } = require("./utils/sublevel");
+const { SubLevelTypes } = require("../config/constants");
+
+module.exports = {
+  /**
+   * Gets the sublevel data by `id`
+   */
+  getSubLevelByID: async (req, res, next) => {
+    const { id } = req.params;
+
+    if (!id) {
+      res.status(400).send("Missing id param");
+      return;
+    }
+
+    try {
+      const subLevelData = await Sublevel.findById(id);
+      if (!subLevelData) {
+        res.status(404);
+        return;
+      }
+      req.send(subLevelData);
+    } catch (error) {
+      next(error);
+    }
+  },
+
+  /**
+   * Create a sublevel
+   */
+  createSubLevel: async (req, res, next) => {
+    const { name, type, specs, parent_id, parentIsLevel, positions } = req.body;
+
+    if (!(name && type && parent_id && positions)) {
+      res.status(400).send("Missing params param");
+      return;
+    }
+
+    if (!SubLevelTypes.includes(type)) {
+      res.status(400).send("Invalid type");
+      return;
+    }
+
+    if (!validPositions(positions)) {
+      res.status(400).send("Invalid positions");
+      return;
+    }
+
+    try {
+      const parentData = parentIsLevel ? { parent_current_depth: 0, parent_main_level_id: parent_id } : await Sublevel.findById(parent_id);
+
+      const { parent_current_depth, parent_main_level_id } = parentData;
+
+      const sublevelData = new Sublevel({
+        name,
+        type: type,
+        specs,
+        main_level_id: parent_main_level_id,
+        current_depth: parent_current_depth + 1,
+        parent_sublevel_id: mongoose.Types.ObjectId(parent_id),
+        preffered_inventory: [],
+      });
+
+      await addSublevelToParent({ type, positions, sub_level_id: sublevelData._id.toString() }, parent_id, parentIsLevel);
+
+      await sublevelData.save();
+      if (!sublevelData) {
+        res.status(404);
+        return;
+      }
+      req.send(sublevelData);
+    } catch (error) {
+      next(error);
+    }
+  },
+
+  /**
+   * Update a sublevels' detail
+   */
+  updateSubLevelDetailsByID: async (req, res, next) => {
+    const { name, type, specs } = req.body;
+    const { id } = req.params;
+
+    if (!(name || type || specs)) {
+      res.status(400).send("Missing params param");
+      return;
+    }
+
+    if (type && !SubLevelTypes.includes(type)) {
+      res.status(400).send("Invalid type");
+      return;
+    }
+
+    try {
+      const sublevelData = await Sublevel.findById(id);
+      if (!sublevelData) {
+        res.status(404);
+        return;
+      }
+
+      if (name) sublevelData.name = name;
+      if (type) sublevelData.type = type;
+      if (specs) sublevelData.specs = specs;
+
+      const newData = await sublevelData.save();
+      req.send(newData);
+    } catch (error) {
+      next(error);
+    }
+  },
+
+  /**
+   * Deletes a sublevel
+   */
+  deleteSublevel: async (req, res, next) => {
+    const { id } = req.params;
+    if (!id) {
+      res.status(404).send("Provide an ID");
+    }
+
+    try {
+      const deletedSublevels = deleteSubLevelTreeFromRoot(id);
+      res.send({ success: deletedSublevels.length, data: { deletedSublevels: deletedSublevels } });
+    } catch (err) {
+      next(err);
+    }
+  },
+
+  /**
+   * Add preffered_inventory to a sublevel
+   */
+  addInventory: async (req, res, next) => {
+    const { id, inventory } = req.body;
+    const sublevelData = await Sublevel.findById(id);
+    if (!sublevelData) {
+      res.status(404);
+      return;
+    }
+    // eslint-disable-next-line no-prototype-builtins
+    if (inventory.every((_) => _.hasOwnProperty("id") && _.hasOwnProperty("type"))) {
+      res.status(404).send({ success: false, message: "invalid inventory data" });
+      return;
+    }
+    try {
+      sublevelData.preffered_inventory.push(...inventory);
+      await sublevelData.save();
+      res.send({ success: true, data: sublevelData.preffered_inventory });
+    } catch (err) {
+      next(err);
+    }
+  },
+};
diff --git a/src/controller/sublevel.router.js b/src/controller/sublevel.router.js
new file mode 100644
index 0000000..3f4a4e2
--- /dev/null
+++ b/src/controller/sublevel.router.js
@@ -0,0 +1,29 @@
+const router = require("express").Router();
+const controller = require("./sublevel.controller");
+
+/**
+ * @route /sublevel/:id
+ */
+router.get("/:id", controller.getSubLevelByID);
+
+/**
+ * @route /sublevel/
+ */
+router.post("/", controller.createSubLevel);
+
+/**
+ * @route /sublevel/:id
+ */
+router.patch("/:id", controller.updateSubLevelDetailsByID);
+
+/**
+ * @route /sublevel/:id
+ */
+router.delete("/:id", controller.deleteSublevel);
+
+/**
+ * @route /sublevel/add-inventory
+ */
+router.post("/add-inventory", controller.addInventory);
+
+module.exports = router;
diff --git a/src/controller/utils/sublevel.js b/src/controller/utils/sublevel.js
new file mode 100644
index 0000000..3e63a93
--- /dev/null
+++ b/src/controller/utils/sublevel.js
@@ -0,0 +1,114 @@
+const Sublevel = require("../../models/Sublevel");
+const Level = require("../../models/Level");
+const { LevelPositions } = require("../../config/constants");
+
+/**
+ * To move a sub level
+ * @param {string} sub_level_id The Sublevel to me moved
+ * @param {string} parent_sub_or_level_id The Level/Sublevel under which to be moved
+ * @returns {{success: boolean, message: string}}
+ */
+const moveSublevel = async (sub_level_id, parent_sub_or_level_id) => {
+  /**
+   * - Check if depths of parent_sub_level_id and parent_sub_or_level_id are same
+   * - Copy and add references
+   * - Delete and remove references
+   */
+  return { success: false, message: "not implemented" };
+};
+
+/**
+ * To delete a sub level and all corresponding sub levels under it
+ * @param {string} root_sub_level_id The root Sublevel ID
+ * @returns {string[]} The Sublevel IDs that have been deleted
+ */
+const deleteSubLevelTreeFromRoot = async (root_sub_level_id) => {
+  let sub_level_ids = [];
+  let temp_sub_level_ids = [root_sub_level_id];
+
+  // remove from parent first
+  await removeSublevelFromParent(root_sub_level_id);
+
+  while (temp_sub_level_ids.length > 0) {
+    const level_sub_level_data = await Sublevel.find({
+      _id: temp_sub_level_ids,
+    });
+
+    sub_level_ids = [...sub_level_ids, ...temp_sub_level_ids];
+    temp_sub_level_ids = [];
+
+    level_sub_level_data.forEach((sub_level_data) => {
+      sub_level_data.sub_levels.forEach((sub_level) => {
+        temp_sub_level_ids.push(sub_level.sub_level_id.toString());
+      });
+    });
+  }
+
+  await Sublevel.deleteMany({ _id: sub_level_ids });
+  console.log("Deleting sub-level tree", { sub_level_ids });
+  return sub_level_ids;
+};
+
+/**
+ * Add the sublevel data to the parent document
+ * @param {{type: string, positions: string[], sub_level_id: string}} payload The sublevel data
+ * @param {string} parent_id The parent level ID
+ * @param {boolean} parentIsLevel Is parent a level?
+ */
+const addSublevelToParent = async (payload, parent_id, parentIsLevel) => {
+  if (parentIsLevel) {
+    // add sublevel to parent
+    const parentData = await Sublevel.findById(parent_id);
+    parentData.sub_levels.push(payload);
+    return await parentData.save();
+  } else {
+    // add sublevel to sublevel
+    const parentData = await Sublevel.findById(parent_id);
+    parentData.sub_levels.push(payload);
+    return await parentData.save();
+  }
+};
+
+const removeSublevelFromParent = async (id) => {
+  const { main_level_id, parent_sublevel_id, current_depth } = await Sublevel.findById(id);
+  if (current_depth == 1) {
+    // it means parent is level
+    const parentData = await Level.findById(main_level_id);
+    parentData.sub_levels = parentData.sub_levels.filter((sub_level) => sub_level.sub_level_id != id);
+  } else {
+    // parent is another sublevel
+    const parentData = await Sublevel.findById(parent_sublevel_id);
+    parentData.sub_levels = parentData.sub_levels.filter((sub_level) => sub_level.sub_level_id != id);
+  }
+};
+
+/**
+ * Provides a list of available positions at the particular Level/Sublevel
+ * @param {object} sublevelData Level / Sublevel mongoose document
+ * @returns {string[]} The list of available positions
+ */
+const findAvailablePositions = (sublevelData) => {
+  let positionsOccupied = [];
+  sublevelData.sub_levels.forEach((sublevel) => {
+    positionsOccupied = [...positionsOccupied, ...sublevel.sub_levels];
+  });
+  return LevelPositions.filter((pos) => !positionsOccupied.includes(pos));
+};
+
+/**
+ * Check if positions are valid positions
+ * @param {string[]} positions An array of positions
+ * @returns {boolean}
+ */
+const validPositions = (positions) => {
+  return positions.every((position) => LevelPositions.includes(position));
+};
+
+module.exports = {
+  addSublevelToParent,
+  removeSublevelFromParent,
+  deleteSubLevelTreeFromRoot,
+  moveSublevel,
+  findAvailablePositions,
+  validPositions,
+};
diff --git a/src/models/Level.js b/src/models/Level.js
index debc961..c33565d 100644
--- a/src/models/Level.js
+++ b/src/models/Level.js
@@ -1,5 +1,5 @@
 const mongoose = require("mongoose");
-const { SubLevelTypes } = require("../config/constants");
+const { SubLevelTypes, LevelPositions } = require("../config/constants");
 
 const schema = new mongoose.Schema(
   {
@@ -14,8 +14,7 @@ const schema = new mongoose.Schema(
       trim: true,
     },
     specs: {
-      // TODO: TBD
-      type: String,
+      type: Object,
       trim: true,
     },
     bay_id: {
@@ -27,18 +26,14 @@ const schema = new mongoose.Schema(
         type: {
           required: true,
           type: String,
-          enum: SubLevelTypes
-        },
-        depth: {
-          required: true,
-          type: Number,
-          min: 1, // Level is at 0
-          max: 5,
-        },
-        bay_id: {
-          type: mongoose.Schema.Types.ObjectId,
-          ref: "Bay",
+          enum: SubLevelTypes,
         },
+        postitions: [
+          {
+            type: String,
+            enum: LevelPositions,
+          },
+        ],
         sub_level_id: {
           required: true,
           type: mongoose.Schema.Types.ObjectId,
diff --git a/src/models/Sublevel.js b/src/models/Sublevel.js
index 172e538..b32bee0 100644
--- a/src/models/Sublevel.js
+++ b/src/models/Sublevel.js
@@ -1,5 +1,5 @@
 const mongoose = require("mongoose");
-const { SubLevelTypes } = require("../config/constants");
+const { SubLevelTypes, LevelPositions, SublevelInventoryTypes } = require("../config/constants");
 
 const schema = new mongoose.Schema(
   {
@@ -11,11 +11,10 @@ const schema = new mongoose.Schema(
     type: {
       type: String,
       required: true,
-      enum: SubLevelTypes
+      enum: SubLevelTypes,
     },
     specs: {
-      // TBD
-      type: String,
+      type: Object,
       trim: true,
     },
     main_level_id: {
@@ -39,12 +38,12 @@ const schema = new mongoose.Schema(
           type: String,
           enum: SubLevelTypes,
         },
-        depth: {
-          required: true,
-          type: Number,
-          min: 1, // Level is at 0
-          max: 5,
-        },
+        postitions: [
+          {
+            type: String,
+            enum: LevelPositions,
+          },
+        ],
         sub_level_id: {
           required: true,
           type: mongoose.Schema.Types.ObjectId,
@@ -56,10 +55,16 @@ const schema = new mongoose.Schema(
       type: Boolean,
       default: false,
     },
-    inventory: [
+    preffered_inventory: [
       {
-        type: mongoose.Schema.Types.ObjectId,
-        ref: "Inventory",
+        id: {
+          type: mongoose.Schema.Types.ObjectId,
+          refPath: "type",
+        },
+        type: {
+          type: String,
+          enum: SublevelInventoryTypes,
+        },
       },
     ],
   },