A redesign should make your website better for visitors and search engines — but done carelessly, it can wipe out years of search traffic overnight. The good news: almost all redesign SEO losses are preventable. Here is the checklist we use.
Why redesigns lose rankings
- Changed URLs with no redirects. Google and backlinks still point at the old address, which now returns a 404.
- Lost content. Pages that ranked are removed or cut down.
- Missing metadata. Titles, descriptions, headings and structured data are not carried over.
- Technical mistakes. A staging "noindex" left on, a blocked robots.txt, broken canonical tags or a much slower site.
- Internal links broken. Navigation and in-content links point to pages that no longer exist.
Before launch
1. Benchmark everything
Export from Google Search Console and your analytics: top pages by clicks, top queries, pages with backlinks, and current Core Web Vitals. This is your baseline and your priority list.
2. Crawl the old site
Use a crawler to list every URL, title, description, H1, canonical and status code. Include images and PDFs that receive traffic.
3. Build a URL redirect map
For every old URL, decide the new destination:
| Old URL situation | Action |
|---|---|
| Same page, same URL | Keep it — the safest option |
| Same page, new URL | Permanent redirect to the new URL |
| Merged into another page | Redirect to the page that now covers the topic |
| Removed, with a close alternative | Redirect to the closest relevant page |
| Removed, no alternative, no traffic or links | Let it return 404 or 410 |
Avoid redirecting everything to the home page — Google treats that much like a missing page.
4. Use permanent redirects
Use 301 or 308 status codes for permanent moves; both pass ranking signals. Avoid chains (A to B to C) and loops. On Next.js, redirects live in next.config.js; on WordPress, a redirect plugin or server rules do the job.
5. Carry over on-page SEO
Keep or improve each important page's title tag, meta description, H1, body content, image alt text, internal links and structured data (Organization, Product, FAQ, Article, Breadcrumb).
6. Check the staging site
Block staging from search engines, but make sure noindex is removed at launch. Test page speed, mobile layout and accessibility before you go live.
Launch day
- Deploy the redirects together with the new site.
- Confirm robots.txt allows crawling and the XML sitemap lists only live, canonical URLs.
- Submit the new sitemap in Google Search Console and Bing Webmaster Tools; use IndexNow to notify Bing and other participating engines.
- Test a sample of old URLs and confirm each returns a single permanent redirect to the right page.
- Update key backlinks you control — social profiles, directories, Google Business Profile.
After launch
- Watch Search Console daily for the first two weeks, then weekly for at least eight weeks: Pages report, 404s, crawl errors and Core Web Vitals.
- Fix new 404s quickly with redirects.
- Compare traffic and rankings against your baseline. Some fluctuation in the first few weeks is normal.
- Keep redirects in place for at least a year — ideally permanently.
A real example: fixing legacy URLs
When we rebuilt the Zinetics website, Google Search Console reported pages it could not index — old URLs from a previous version of the site, such as individual iOS, Android and enterprise app pages, an old case-studies page and variants such as /about-us and /contact-us. Each one returned a 404. We mapped them to their closest current pages (for example, the old iOS and Android pages to our mobile development page) and added permanent 308 redirects, then confirmed every URL in the sitemap returned 200 and was indexable. Within the same deployment, legacy links that had been dead started passing visitors and ranking signals to live pages again.
Do not forget AI search
AI assistants such as ChatGPT, Perplexity and Google AI Overviews also crawl and cite your pages. Keep your structured data, clear answers and an up-to-date llms.txt file in place after a redesign. Our guide to ranking in AI search explains more.
Planning a redesign or platform change? Zinetics handles redesigns and migrations with SEO built into the plan. See our web development services or talk to us.