There are a few ways to provide a broadband Wi-Fi signal to your garden office: Position your garden building close enough to your house that your home Wi-Fi signal will carry. However, this will depend upon where exactly the router is positioned inside your home, and it might not provide a good enough signal after passing through several walls. Get a Wi-Fi extension device, connect it to your router, and plug it in inside your garden office. Ask your broadband provider about installing a broadband cable to your garden office. Options 2 and 3 will require your garden office to have an electricity supply (although, if you are planning to use a computer in it, you probably already considered this). For more, see our post on installing utilities in your garden room and how to install Wi-Fi in your garden office.