Check out this article regarding redesigning your website, and which approach you should take. It approaches redesign with three different methods; big bang, gradual and evolutionary. It explains the pro’s and con’s of each different approach. So how would you like your website redesign?

Website Redesign: Big Bang, Gradual or Evolutionary Approach? | Smiley Cat Web Design
1. Big bang — move completely from an old to a new design in one go
2. Gradual — implement the redesign by sections over time
3. Evolutionary — avoid redesigning altogether and focus on improving the existing site

These approaches have their advantages and disadvantages. Let’s consider them in reference to a large, content-rich website.