Search Engine Rankings
One of the most important aspects that need to be considered during website design is the SEO or Search Engine Optimization. The web designer or the web designing company must ensure that the websites equity should not be affected.
Google reindexing should be taken care of as the website may get recognized as a completely new site. There are ways to bypass SEO related hurdles. Some of the things that the web design company could do is to retain all meta tags and meta keywords.
The URLs should also be kept unchanged as change in URLs could lead to those pages getting cached anew. There should be an effective use of canonical tags and 301 redirects. The sitemap must be immediately submitted to Search Engines, once the website is launched.