Your site needs a redesign, but one fear is holding you back: watching the Google rankings you spent years building disappear. That fear is legitimate, because a poorly prepared redesign really can send a site tumbling. The good news is that this risk can be managed very well. Here’s the website migration method I use to redesign a site without losing its search rankings, step by step.

Website migration: why a site loses rankings

In the vast majority of cases, the drop comes from one of these three causes:

  • URLs that disappear: the old pages return a 404 error, and Google loses track of the pages it was ranking;
  • deleted content: a text that ranked well is replaced by a nice image and two lines;
  • a technical error: a site left on “noindex” after the staging phase, a robots.txt file that blocks everything, broken internal links.

The six steps below deal with these three risks one by one.

1. Take a snapshot of the existing site before touching anything

Before making the slightest change, you take a complete inventory of the current site:

  • every URL for pages, posts, images and PDFs, using the sitemap and a crawler such as Screaming Frog (free for up to 500 URLs);
  • the pages that matter, identified in Google Search Console: the ones that get clicks, and the queries they appear for;
  • the pages that receive links from other websites, which are valuable for your site’s authority;
  • the title and description of each page.

This snapshot serves as your reference throughout the project, and afterwards too.

2. Decide the fate of every page

Each old URL gets a decision, recorded in a redirect map (old URL, new URL):

  • keep the same URL: this is ideal for the pages that perform well;
  • redirect to the new page that covers the same topic;
  • merge several small, closely related pages into one more complete page, and redirect each of them to it;
  • delete a page that’s truly useless, with no traffic and no links.

This map is the most important document of the redesign. It must not leave a single URL out.

3. Keep the content that ranks

A page ranks well because of its content. The new version must keep the essentials: the topic, the headings, the paragraphs that answer searchers’ questions. You can improve it, reformat it, expand it. What you avoid is emptying it.

4. Set up the 301 redirects

A 301 redirect tells browsers and Google that a page has moved permanently. A visitor who lands on the old URL is sent to the new one, and Google carries over to the new page what it knew about the old one.

On Apache hosting, as with OVH, a redirect takes a single line in the .htaccess file:

Redirect 301 /old-page/ https://www.example.com/new-page/

On WordPress, a plugin such as Redirection or the redirections module in Rank Math does the same thing from the dashboard. Three rules:

  • redirect to the closest page on the same topic, and never send everything to the homepage, which Google treats as a page not found;
  • avoid redirect chains (A to B to C): each old URL points directly to its final destination;
  • don’t forget the images and PDFs that get visits.

Google details these best practices in its documentation on site moves with URL changes, useful reading before any website migration.

That’s what I did for my own site when I redesigned it: every old URL from the former WordPress site redirects to its new page.

5. Launch-day checks

On launch day, a checklist prevents silly but costly mistakes:

  • the WordPress option “Discourage search engines from indexing this site” is unchecked, and no important page is set to noindex;
  • the robots.txt file doesn’t block the site;
  • the site runs on HTTPS everywhere, with no mixed content;
  • the redirects in your map really return a 301, which you test on a sample of old URLs;
  • internal links point directly to the new URLs, not to redirects;
  • the sitemap is up to date and contains only valid pages.

6. Monitor the site over the following weeks

After launch, Google Search Console becomes your dashboard:

  • submit the new sitemap in the Sitemaps section;
  • keep an eye on the Pages report, which shows the indexed pages and the ones with issues;
  • fix the 404 errors as they appear;
  • compare clicks and rankings with the period before the redesign.

A slight fluctuation in the first few weeks is normal. What should set off alarm bells is a sharp, lasting drop on specific pages: it almost always points to a missing redirect or to content that has disappeared.

Common website migration mistakes

  • Redirecting everything to the homepage, because it’s easier.
  • Changing the domain name and the structure at the same time: you take on two risks at once. If both are necessary, it’s better to spread them out.
  • Leaving the staging site’s noindex on the live site.
  • Deleting pages that receive links without redirecting them.
  • Not checking anything after launch.

The bottom line

A successful website migration comes down to a complete inventory, a redirect map with nothing left out, clean 301 redirects and close monitoring after launch. With this method, a redesign becomes an opportunity to gain rankings rather than lose them.

If you’re still unsure about redesigning your site, my article on the 7 signs it’s time to redo it will help you decide. And for a website redesign carried out with this method, let’s talk.