By default, once you create an inventory or service item it is instantly created across all stores, but this option is not suitable if you run a franchise location. We've recently introduced a trigger which allows you to enable or disable auto-creation of products.
Head to Store Settings of the particular store.
Scroll to the Other Information section.
Choose the option "No" under "Automatically create inventory & service items on other stores" as displayed in the screenshot.
Now service or inventory items on this store will not be added to other store locations.