A final walkthrough is the last stage before closing on a newly constructed home. You will review elements such as site grading, roof and gutters, other exterior features, finish quality, flooring, appliances and internal systems. Of course, you shouldn't do it alone. Your real estate agent, if you have one, and a builder representative should accompany you and use blue tape to mark problem areas. During your walkthrough, use this checklist as a guide. Check the foundation.