The Site Assessment stage deals with the questions you need to ask yourself before you buy the site, or plan to build on a site that has been gifted to you.
Will it cost you a fortune to bring services to the house? Will it even be possible to get planning permission, e.g. is it safe to access, is zoning in your favour? Will it be easy to build there or will it cost you a fortune to get things to site? Does it have everything you need to build the kind of home you want?