My advice would be do a detailed walkthrough with your general contractor before starting the project to document everything. Sometimes a lot of stuff is not on the plan, and it could lead to an expensive change order, so a walkthrough before the project is very important. Also, a walkthrough after the project, it's completed To make sure all the scope, all of the scope of work has been addressed and the projects being delivered based on the approved plan and no question asked later on.
So these two important walkthrough is gonna save you money in the long run, and also they can address any possible scope changes that may affect your project during the initial walkthrough with your contractor. So walkthrough are very, very important to Your project, make sure everything is documented and addressed.