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Website relaunch without losing rankings: protect your visibility on Google and AI with a redirect plan, a go-live checklist and questions for your agency.
A website relaunch puts your visibility on Google at risk mainly through missing redirects, deleted content and a forgotten noindex block. The roadmap has five phases: taking stock, planning with a redirect plan, testing, a go-live checklist and several weeks of monitoring in Search Console. SEO belongs in the requirements specification from the start.
The key points at a glance
Every old address needs a permanent 301 redirect to the new page with matching content. Source (opens in a new tab)
The most common relaunch mistake is a noindex or password block left over from the testing phase.
Slight fluctuations in the first weeks after launch are normal; a sharp or lasting drop points to mistakes.
A website relaunch can cost you a large share of your visitors from Google overnight – usually because page addresses change without the old addresses being redirected, because important content is lost, or because the new website is accidentally left blocked for search engines. With a stocktake beforehand, a clean redirect plan, a go-live checklist and a few weeks of monitoring afterwards, you can reliably avoid this. For medium-sized businesses with many pages and hard-won visibility in particular, a lot is at stake.
Why a website relaunch often leads to a crash on Google
A relaunch is the redesign of a website – from a new look to a new content management system to a move to a new domain. Over the years, Google has learned which of your pages match which search terms. If a lot changes at once, Google has to learn again. The more changes, the greater the risk:
Type of change
Risk
New design only, same addresses and content
low
New content management system (e.g. from Typo3 to WordPress)
medium – addresses often change
New page structure, content merged or deleted
high
New domain (e.g. after a company rename)
very high
Phase 1: Taking stock – know what you have
Before anything changes, record what works today:
The most important pages: In Google Search Console, the “Performance” report shows which pages bring the most visitors from Google and through which search terms. Export this data.
All addresses: A so-called crawler automatically collects all pages of your website in a list. For smaller websites, the free version of Screaming Frog SEO Spider (up to 500 addresses) is enough.
Pages with links from outside: Pages that other websites link to are especially valuable. Search Console shows them under “Links”.
Secure your baseline figures: Visitor numbers, enquiries, rankings – so that you can compare later.
Phase 2: Planning – every old address needs a destination
The redirect plan
The heart of every relaunch: a table in which every old address is matched with the right new one. Technically, this is done with a permanent redirect, known as a 301 redirect. When someone opens the old address – whether a person, Google or an AI assistant – they land automatically on the new one. Google explains this in its guide to redirects.
Important: redirect to the new page with matching content, not everything to the home page. Google treats that like a missing page.
Don't delete content lightly
A relaunch is a good opportunity to tidy up. But pages that bring in many visitors today should keep their content. If you cut a well-ranked guide down to three sentences, it will probably disappear from the results. The same goes for page titles, headings and structured data.
Put SEO in the requirements specification
Put SEO requirements in writing before the agency gets started: redirects, loading time, mobile-friendliness, editable page titles, structured data. What isn't in the brief often doesn't get done – and is later retrofitted at great expense.
Phase 3: Test before it gets serious
The new website is usually built in a test environment – a copy that only the project team can see. It's best to protect it with a password so that Google doesn't find it too early. Check the following there:
Do all the redirects from the plan work?
Does the site load quickly, including on mobile?
Have page titles and descriptions been carried over?
Are there any broken links?
Do forms, shop and tracking work?
Phase 4: Go-live day
Check these points straight after launch:
Block removed? Password protection, “noindex” and restrictions in robots.txt from the testing phase must go. This is the most common and most expensive mistake – read more in Why can't Google find my website?.
Redirects active? Spot-check the most important old addresses.
HTTPS everywhere? No page without the padlock symbol.
Sitemap submitted? Add the new table of contents for search engines in Search Console.
Update profiles: Adjust links in Google Business Profiles, social media, industry directories and email signatures.
AI crawlers allowed? New hosting or security services sometimes block the programs of AI providers by default. Read more in What is GEO?.
Phase 5: The weeks afterwards
Google needs time to recrawl a rebuilt website. Slight fluctuations in the first few weeks are normal. Look at Search Console regularly during the first two to three months:
“Pages” report: Do lots of errors such as “Not found (404)” appear? Then redirects are missing.
“Performance” report: Compare clicks and rankings with your baseline figures from Phase 1.
Enquiries and revenue: The most important metric – are customers still coming through the website?
Especially among medium-sized businesses, the relaunch is usually carried out by an agency. You should clarify these questions before the project starts:
Who creates the redirect plan, and who checks it?
Is SEO a firm part of the offer – or an add-on that costs extra?
How is the test environment protected from Google, and who removes the protection at launch?
Who monitors Search Console after launch and fixes errors?
How long is the agency available for follow-up fixes after launch?
A relaunch should move your business forward, not set it back. Anyone who knows beforehand which pages are valuable, redirects every old address cleanly, works through the checklist on launch day and then watches closely for a few weeks keeps their visibility – and often even gains with the better website.
Frequently asked questions
Slight fluctuations in the first few weeks are normal, because Google has to recrawl the new website first. A sharp or lasting drop, however, points to mistakes, usually missing redirects or an accidental block.
Permanently if possible, but for at least a year. Old addresses stay in bookmarks, on other websites, in brochures and in the data of AI assistants for a long time.
From the very beginning, ideally when you plan the page structure. If you only check SEO shortly before launch, you often have to make expensive fixes.
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