Technical SEO
How to redesign or migrate a website without losing rankings
15 June 2026 · 8 min read · Coselli, Bournemouth
Redesigns are the most common cause of catastrophic traffic loss in small business SEO. The plan that prevents it is not complicated — it is just rarely followed.
A redesign changes URLs, templates, content and sometimes the domain all at once. Any of those alone is manageable; all four unmanaged is how sites lose 60% of their organic traffic overnight. Here is the sequence that prevents it.
Before you build: benchmark
- 01Crawl the entire existing site and export every URL.
- 02Export twelve months of Search Console data — queries, pages, clicks, impressions.
- 03Export analytics landing page performance and conversion data.
- 04List your top 50 pages by traffic and by revenue. These are non-negotiable survivors.
- 05Record current rankings for your key terms so you can measure the change.
During the build: map and preserve
- Keep URLs identical wherever you possibly can. The best migration changes no URLs at all.
- Where URLs must change, build a one-to-one redirect map. Old URL, new URL, no chains, no bulk redirects to the homepage.
- Carry over the content that earns the rankings. A prettier page with a third of the copy usually ranks worse.
- Preserve titles, meta descriptions, headings and structured data unless you are deliberately improving them.
- Block the staging environment with authentication, not just robots.txt.
Pre-launch checklist
- 01Remove any noindex left over from staging — check the rendered HTML of every template.
- 02Verify robots.txt allows the site.
- 03Test every redirect from the map, including https and www variants.
- 04Confirm canonicals self-reference on the new URLs.
- 05Regenerate the XML sitemap with only new, live, canonical URLs.
- 06Check analytics and conversion tracking fire on the new templates.
- 07Run Core Web Vitals on the main templates.
Launch day
- Deploy at a low-traffic window.
- Immediately crawl the live site looking for 404s, redirect chains and missing metadata.
- Submit the new sitemap in Search Console; if the domain changed, use the Change of Address tool.
- Watch server logs for crawler errors for the first 48 hours.
The first ninety days
Expect some fluctuation for two to four weeks; that is normal as Google reprocesses the site. What is not normal is a sustained decline. Check the Page Indexing report weekly, compare query-level performance against your benchmark, and fix the specific pages that dropped rather than panicking site-wide.
Keep the old crawl export and redirect map for a year. Almost every post-migration mystery is solved by a URL nobody remembered.
Frequently asked
- How long does it take to recover after a migration?
- A well-executed migration usually stabilises within two to four weeks. If traffic is still materially down after eight weeks, something structural is wrong — usually redirects or missing content.
- Can I change my domain name safely?
- Yes, with a full one-to-one redirect map, the Change of Address tool in Search Console, and updates to every external listing and citation pointing at the old domain.