Junction box installation costs $100 to $300 for parts and labor, depending on the installation location, accessibility, and the electrical box size, material, and indoor or outdoor rating. The price can vary widely based on size, material, ingress protection (IP) rating, and additional customisation. At indEx, we offer instant pricing through our online 3D Configurator. Design your custom junction box and get real-time. We offer bespoke, custom-made terminal boxes and terminal box combinations, as well as standard products with short delivery times. Junction Boxes on the other hand are cost-effective and commonly available.