Many redesigns go wrong for one simple reason: the old URLs are changed without a redirect plan. That can send people to 404 pages, break links from search results or other websites, and make search engines treat the new site as a set of unfamiliar pages.
A redirect plan does not guarantee that rankings will stay exactly where they were. But it gives search engines and visitors a clear path from the old site to the new one, which is the best way to protect existing traffic and enquiries.
What a redirect plan actually does
A redirect plan lists the important old URLs and matches each one to the best new destination. When someone requests the old address, the server sends them to the new page automatically.
The key word is best. The redirect should point to the closest relevant page, not whatever page happens to be easiest. If a loft-conversion page is replaced by a new service page, the old URL should go to the new loft-conversion page or the nearest equivalent service page. It should not go to the homepage just because the homepage exists.
Why it matters before launch
Without redirects, the damage is usually practical rather than dramatic: lost rankings on the pages that mattered, broken bookmarks, wasted backlinks and a poor user experience for anyone following an old link.
That is especially important for pages that already bring in enquiries. A redesign may look better, but if the old service pages disappear without replacements, the site can become harder to find and less useful.
This is why a redesign and the redirect plan need to be planned together, not treated as separate tasks. If you are still deciding whether the job is really a redesign or a rebuild, this website redesign or rebuild guide is worth reading first.
Which URLs deserve priority
Not every old URL needs the same level of attention. Start with the pages that are most likely to matter commercially:
- service pages that rank or generate enquiries
- blog posts with steady organic traffic
- pages linked from Google Business Profile, directories or local listings
- contact, quote and booking pages
- any URL with useful backlinks
A quick review of analytics, Google Search Console and the current site structure usually shows which URLs can remain unchanged, which need a direct redirect and which can correctly return a 404 or 410 because no equivalent content remains.
What good practice looks like
A sensible redirect plan usually follows three rules:
- Keep the URL the same where it still works.
- Map changed URLs to the closest relevant new page.
- Use 301 redirects for permanent moves.
A 301 tells search engines the change is permanent. That is the usual choice for a redesign. Temporary redirects are for temporary changes, not for a site that has been replaced.
It is also worth avoiding redirect chains. An old URL should not jump through several pages before it reaches the final destination. One redirect is cleaner, faster and easier to maintain.
If the site is being moved to a different platform or rebuilt as part of a wider migration, the same principles apply. The details change, but the job is still to map the old URLs carefully before launch. The practical process is covered in how to migrate a WordPress website without losing SEO or enquiries.
The important exception
Do not redirect everything to the homepage. That is the quickest way to lose relevance.
If a page has no sensible replacement and the content is genuinely gone, a broad redirect is often worse than a clean 404 response. In other words, redirect pages that have a close match; do not force every old URL into the nearest live page just to avoid deleting anything.
What to check after launch
A redirect plan is not finished when the new site goes live. Test the old URLs, confirm the response codes and final destinations, and look for unexpected 404s, redirect chains or loops. Internal links, canonical URLs and the XML sitemap should point directly to the final URLs rather than relying on redirects. After launch, website management should include checks for removed pages, renamed URLs and broken links.
For a redesign that needs to protect existing search traffic and enquiry paths, the redirect plan is part of the work, not an optional extra. A properly planned website redesign service should account for URL mapping and redirects before development begins, not after the new design is finished.
