diff --git a/src/repositories/InMemoryParkingRepository.ts b/src/repositories/InMemoryParkingRepository.ts
new file mode 100644
index 0000000..763ab38
--- /dev/null
+++ b/src/repositories/InMemoryParkingRepository.ts
@@ -0,0 +1,36 @@
+import { ParkingGetterSetterRepository } from "./ParkingGetterSetterRepository";
+import { IParkingStructure } from "../entities/ParkingRepositoryEntities";
+
+export class InMemoryParkingRepository implements ParkingGetterSetterRepository {
+  private structures: Map<string, IParkingStructure>;
+
+  constructor() {
+    this.structures = new Map<string, IParkingStructure>();
+  }
+
+  async addOrUpdateParkingStructure(structure: IParkingStructure): Promise<void> {
+    this.structures.set(structure.id, { ...structure });
+  }
+
+  async clearParkingStructureData(): Promise<void> {
+    this.structures.clear();
+  }
+
+  async getParkingStructureById(id: string): Promise<IParkingStructure | null> {
+    const structure = this.structures.get(id);
+    return structure ? { ...structure } : null;
+  }
+
+  async getParkingStructures(): Promise<IParkingStructure[]> {
+    return Array.from(this.structures.values()).map(structure => ({ ...structure }));
+  }
+
+  async removeParkingStructureIfExists(id: string): Promise<IParkingStructure | null> {
+    const structure = this.structures.get(id);
+    if (structure) {
+      this.structures.delete(id);
+      return { ...structure };
+    }
+    return null;
+  }
+}
diff --git a/src/repositories/ParkingGetterRepository.ts b/src/repositories/ParkingGetterRepository.ts
new file mode 100644
index 0000000..0e7e00c
--- /dev/null
+++ b/src/repositories/ParkingGetterRepository.ts
@@ -0,0 +1,6 @@
+import { IParkingStructure } from "../entities/ParkingRepositoryEntities";
+
+export interface ParkingGetterRepository {
+  getParkingStructures(): Promise<IParkingStructure[]>;
+  getParkingStructureById(id: string): Promise<IParkingStructure | null>;
+}
diff --git a/src/repositories/ParkingGetterSetterRepository.ts b/src/repositories/ParkingGetterSetterRepository.ts
new file mode 100644
index 0000000..cfe23ba
--- /dev/null
+++ b/src/repositories/ParkingGetterSetterRepository.ts
@@ -0,0 +1,10 @@
+import { IParkingStructure } from "../entities/ParkingRepositoryEntities";
+import { ParkingGetterRepository } from "./ParkingGetterRepository";
+
+export interface ParkingGetterSetterRepository extends ParkingGetterRepository {
+  addOrUpdateParkingStructure(structure: IParkingStructure): Promise<void>;
+
+  removeParkingStructureIfExists(id: string): Promise<IParkingStructure | null>;
+
+  clearParkingStructureData(): Promise<void>;
+}
diff --git a/test/repositories/InMemoryParkingRepositoryTests.test.ts b/test/repositories/InMemoryParkingRepositoryTests.test.ts
new file mode 100644
index 0000000..b656c81
--- /dev/null
+++ b/test/repositories/InMemoryParkingRepositoryTests.test.ts
@@ -0,0 +1,105 @@
+import { beforeEach, describe, expect, it } from "@jest/globals";
+import { InMemoryParkingRepository } from "../../src/repositories/InMemoryParkingRepository";
+import { IParkingStructure } from "../../src/entities/ParkingRepositoryEntities";
+
+describe("InMemoryParkingRepository", () => {
+  let repository: InMemoryParkingRepository;
+  const testStructure: IParkingStructure = {
+    coordinates: {
+      latitude: 33.794795,
+      longitude: -117.850807,
+    },
+    spotsAvailable: 0,
+    id: "1",
+    name: "Anderson Parking Structure",
+    capacity: 100,
+    address: "300 E Walnut Ave, Orange, CA 92867"
+  };
+
+  beforeEach(() => {
+    repository = new InMemoryParkingRepository();
+  });
+
+  describe("addOrUpdateParkingStructure", () => {
+    it("should add a new parking structure", async () => {
+      await repository.addOrUpdateParkingStructure(testStructure);
+      const result = await repository.getParkingStructureById(testStructure.id);
+      expect(result).toEqual(testStructure);
+    });
+
+    it("should update existing parking structure", async () => {
+      await repository.addOrUpdateParkingStructure(testStructure);
+      const updatedStructure = { ...testStructure, name: "Updated Garage" };
+      await repository.addOrUpdateParkingStructure(updatedStructure);
+      const result = await repository.getParkingStructureById(testStructure.id);
+      expect(result).toEqual(updatedStructure);
+    });
+  });
+
+  describe("removeParkingStructureIfExists", () => {
+    it("should remove existing parking structure and return it", async () => {
+      await repository.addOrUpdateParkingStructure(testStructure);
+      const removed = await repository.removeParkingStructureIfExists(testStructure.id);
+      expect(removed).toEqual(testStructure);
+      const result = await repository.getParkingStructureById(testStructure.id);
+      expect(result).toBeNull();
+    });
+
+    it("should return null when removing non-existent structure", async () => {
+      const result = await repository.removeParkingStructureIfExists("non-existent");
+      expect(result).toBeNull();
+    });
+  });
+
+  describe("clearParkingStructureData", () => {
+    it("should remove all parking structures", async () => {
+      const structures = [
+        testStructure,
+        { ...testStructure, id: "test-id-2", name: "Second Garage" }
+      ];
+
+      for (const structure of structures) {
+        await repository.addOrUpdateParkingStructure(structure);
+      }
+
+      await repository.clearParkingStructureData();
+      const result = await repository.getParkingStructures();
+      expect(result).toHaveLength(0);
+    });
+  });
+
+  describe("getParkingStructures", () => {
+    it("should return empty array when no structures exist", async () => {
+      const result = await repository.getParkingStructures();
+      expect(result).toEqual([]);
+    });
+
+    it("should return all added structures", async () => {
+      const structures = [
+        testStructure,
+        { ...testStructure, id: "test-id-2", name: "Second Garage" }
+      ];
+
+      for (const structure of structures) {
+        await repository.addOrUpdateParkingStructure(structure);
+      }
+
+      const result = await repository.getParkingStructures();
+      expect(result).toHaveLength(2);
+      expect(result).toEqual(expect.arrayContaining(structures));
+    });
+  });
+
+  describe("getParkingStructureById", () => {
+    it("should return null for non-existent structure", async () => {
+      const result = await repository.getParkingStructureById("non-existent");
+      expect(result).toBeNull();
+    });
+
+    it("should return structure by id", async () => {
+      await repository.addOrUpdateParkingStructure(testStructure);
+      const result = await repository.getParkingStructureById(testStructure.id);
+      expect(result).toEqual(testStructure);
+    });
+  });
+});