Site Restructuring.

Re-designing a site to incorporate themes.

[chunk_split]

I'm currently re-designing a site with between 50-100 pages, all the pages are in the root directory. I want to group pages together and place them in relevant directories (keyword themed). Is there an easy way to go about this, most of the pages are indexed by the SE's and place well on the SERP's for targeted keywords.

[2by4]

Put a 301 from each old url to each new url, if it's only 50-100 pages it doesn't take long to do that. If it's Apache hosted, you can do it in .htaccess. I just redid a site of about 100 pages and did the same you are asking, put stuff in folders etc, then I just added 301s, search engines barely blinked at the site restructuring.

[etechsupport]

I think redirecting 301 from each old url to each new url is good idea.

[Import Export]

In my opinion. Before I make moves, I would figure out how important your site is in the (potential) bag of sites you hold.

I think an important aspect of this might have already been answered. If your website currently ranks very well across the engines you would like it to, why change to a theme?

What are you planning on doing with this restructure? Are you planning on publishing new content into the same current theme your website is in? Are you planning on expanding the theme to cover a more broad/narrow base of vert/hor/sub/parent topics?

There are a number of things to consider before you go about changing a "well-ranking" site.