On average, it can take anywhere from a few days to several weeks to complete the installation process. The time it takes to complete a fibre installation can vary significantly depending on several factors, including: The farther your premises are from the fibre node, the longer the installation will take. This is because the fibre cable needs to be laid over a longer distance, which can be. How long does the setup take? Most residential jobs finish within a few hours. Every building has unique needs. How Do You Check Fiber Internet Availability? Before you install fiber internet, check. This process can take weeks or even months before individual home installations can begin. Make sure you have any necessary permits or permission to install fiber internet.