A website is never done. Everyone has worked on a project that changed so much after it launched that they no longer wanted it in their portfolio. One way to help those who take over your projects is to produce a style guide.
Edward Tufte once said: “Great design is not democratic; it comes from great designers. If the standard is lousy, then develop another standard.” Although there’s no stopping some clients from making their website awful, by creating a style guide, you’re effectively establishing rules for those who take over from you.