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Website Relaunch SEO

Preserves and improves organic visibility when redesigning, migrating, or rebuilding a site through controlled audits, URL mapping, redirects, and post-launch technical validation.

Many people treat a relaunch as a design project and ignore the SEO migration, only to lose rankings they had built for years.

Key points

  • Crawl your existing site completely before any redesign work begins to capture every indexable URL.
  • Map every old URL to its new equivalent using 301 redirects and test them before going live.
  • Keep metadata, canonicals, and structured data intact unless you deliberately update them.
  • Validate redirects, internal links, and indexing after launch and monitor rankings for at least two weeks.

A regional news site loses 80% of traffic

A regional news site with 10,000 indexable URLs relaunched without a complete URL inventory or redirect map. The top 5,000 pages by traffic returned 200 status on only 200 URLs; the rest served 404s. Organic traffic fell by 80% within two weeks. Google's index shrank from 9,000 pages to 1,200. Recovery took six months of rebuilding redirects, resubmitting sitemaps, and regaining lost backlinks.

Three mistakes that destroy your SEO value

  • Missing URL inventory Launching without a full crawl of existing URLs means you cannot redirect properly, resulting in lost pages and 404s.
  • Changing metadata unintentionally During a website redesign, title tags, meta descriptions, and canonicals are often stripped or altered, confusing search engines and harming relevance. This mistake can destroy SEO for sites with multiple locations.
  • Skipping post-launch monitoring Without tracking rankings, traffic, and crawl errors, you may not realise your site has lost visibility for weeks.

Three checks before you launch

  • Crawl staging site Use a tool like Screaming Frog to crawl the staging version and verify all SEO elements are present before going live.
  • Test redirects in staging Apply the 301 redirect map on staging and confirm each old URL resolves to the correct new one without chains.
  • Validate robots.txt and sitemaps Ensure robots.txt does not block important resources, and submit a new XML sitemap containing only the new URLs. Test that both are working on the live site after launch.

Common questions

Does changing your website affect SEO?

Yes, it can change rankings, traffic, and crawling. A controlled migration with redirects and monitoring minimises risk.

How does a website relaunch impact search rankings?

It can cause temporary volatility or permanent drops if URLs, metadata, or infrastructure are not handled carefully.

Sources

  1. Google Search Central Official Google documentation on site moves and migrations.
  2. Whole Whale Practical checklist covering 16 steps for preserving SEO.
  3. Raidboxes Guide to planning and executing a relaunch without losing visibility.
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