The amount of time it will take to a kitchen remodel cannot be predicted accurately because of the number of variables involved. From the time you choose the materials, you should plan for the project to be done in a few weeks. This is especially important if you are putting in custom cabinets, which usually take between eight and ten weeks to make. How long it will take to finish the project will depend on how big the renovation is, how quickly you can get the materials you want, and how busy your contractor is right now. Once all the materials are ready and the demolition is over, installation usually takes a few weeks.