Website Migration SEO: Change Your Website Without Losing Rankings

Changing your website should move your organisation forward, not send your search visibility backwards. Yet moving to a new domain, a new platform or a new URL structure is one of the most common reasons organisations lose traffic. Usually the cause is not the change itself but missed details. Net Branding Limited, trading online as seocompanynz.com, plans website migrations with SEO at the centre. We have worked in digital marketing since 2008, and we treat every URL that earns traffic or links as an asset to protect.

Planning a new website, domain or platform? Start with a clear record of what your current site ranks for and which pages matter most.

What counts as a website migration

A website migration is any significant change that alters how search engines find and understand your pages. Many organisations do not realise their project is a migration until traffic drops.

Common types include:

Domain changes, such as a rebrand from one domain to another or merging several sites.
Platform changes, such as moving from a hosted builder to WordPress or from WooCommerce to Shopify.
URL structure changes, such as reorganising services or removing dates from blog addresses.
Protocol changes, such as moving from HTTP to HTTPS.
Hosting changes, where the server, configuration or content delivery set up changes.
Redesigns that remove, merge or rename pages.
International changes, such as adding country or language versions.

Each type carries different risks. A hosting move may only need careful testing. A domain change combined with a new platform needs detailed planning. Identifying the type of migration early lets us scope the work properly and avoid surprises close to launch.

Why migrations put rankings at risk

Search engines rank individual pages, not whole websites. Each page has built up history: the queries it ranks for, the links pointing to it and the signals that show it is useful. When a page’s address changes, that history has to be passed to the new address deliberately.

The most common causes of lost rankings are:

Old URLs left without redirects, so visitors and search engines reach error pages.
Redirects pointing to the homepage or the wrong page instead of the closest match.
Redirect chains, where one old URL passes through several hops before reaching its destination.
Titles, headings, descriptions and structured data lost in the move.
A noindex setting or robots.txt block carried over from the staging site.
Internal links still pointing to old addresses.
Analytics and Search Console not set up for the new site, so problems go unnoticed.

Google Search Central notes that some ranking fluctuation is normal while a site is recrawled, and that a small to medium site can take a few weeks for most pages to move. A well planned migration keeps that period short and stable. A poorly planned one can leave lasting damage.

URL audits and 301 redirect mapping

The redirect map is the heart of every migration. It tells servers, browsers and search engines exactly where each old page now lives.

Our URL audit and 301 redirect mapping includes:

A full crawl of the current site to capture every live URL, including images and documents.
URLs gathered from XML sitemaps, Google Search Console, analytics and backlink data, so pages missed by a crawl are still found.
Priority ranking by traffic, conversions and external links.
A one to one mapping of each important old URL to its closest new equivalent.
Pattern based rules for large groups of similar URLs where that is safe.
Decisions on retired content, returning a proper 404 or 410 status where no equivalent exists.
Checks to remove redirect chains and loops.

Google recommends server side permanent redirects, such as 301 or 308, and advises redirecting to the final destination rather than through chains. Google also recommends keeping redirects in place for at least a year. We follow that guidance and document the full map so your developer or host can implement it accurately.

Pre launch checks

Most migration problems can be caught before launch if the right checks are done on the staging site. We test the new site as a search engine will see it, not just as a visitor will.

Our pre launch checklist covers:

Benchmarks recorded for rankings, clicks, impressions, top pages and conversions.
Redirects tested against the full map, confirming status codes and destinations.
Titles, meta descriptions, headings and body content compared against the old site.
Self referencing canonical tags on new pages.
Hreflang annotations updated where the site has language or country versions.
Structured data validated for organisation, services, products and articles.
Internal links updated to point directly to new URLs.
XML sitemap prepared with the new URLs.
Robots.txt reviewed, with any development blocks ready to remove.
Analytics, conversion tracking and Search Console verification ready on the new site.
Speed, mobile layout and Core Web Vitals checked against the old site.

Google advises changing one thing at a time where possible. Where a project combines a new domain, platform and design, we discuss whether staging the changes would reduce risk.

Already have a developer building your new site? Cathy can work alongside them on the SEO side of the migration so nothing important is missed.

Launch day and post launch checks

Launch day is when the plan is tested in the real world. We aim to launch at a quieter time for your traffic and avoid periods such as peak sales seasons.

On launch we:

Confirm redirects are live and returning the correct status codes.
Remove noindex rules and development blocks from the live site.
Check canonical tags, robots.txt and the XML sitemap on the live domain.
Test key pages, forms and conversion tracking.

In the weeks after launch we:

Crawl the old URL list again to confirm every redirect still works.
Watch for spikes in not found errors and fix them quickly.
Compare rankings, clicks and conversions against the benchmark.
Request updates to important external links where practical.
Report findings to you in plain language, with any actions needed.

Close monitoring means issues are found in days rather than months. That is often the difference between a short dip and a lasting loss.

Using Google Search Console during a migration

Google Search Console is the main tool for seeing how Google responds to a migration. We set it up and use it at every stage.

Our Search Console work includes:

Verifying both the old and new sites, including relevant domain variants.
Keeping verification methods in place so access is not lost in the move.
Submitting the new XML sitemap once the site is live.
Using the Change of Address tool when moving from one domain or subdomain to another.
Using URL Inspection to test individual redirected and new pages.
Watching page indexing reports for falling indexed URLs on the old site and rising indexed URLs on the new one.
Tracking performance reports for clicks and impressions shifting to new URLs.

Google notes that the Change of Address tool is not needed for HTTP to HTTPS moves or path changes within the same domain. We use it only where it applies.

How this connects to technical SEO

A migration is a concentrated technical SEO project. The same skills that keep a site healthy day to day are what keep it safe during a move: crawling, indexing, redirects, canonical tags, structured data and site speed.

Our technical SEO service covers that ongoing work. Many organisations start with a migration and continue with technical SEO afterwards, because the benchmark and crawl data from the move become the foundation for further improvements. If your migration is part of a redesign, see website redesign. For online stores, our ecommerce websites page explains how product and collection URLs are handled. For multi country sites, see international SEO.

If you are not yet sure what condition your current site is in, an SEO audit is a sensible first step before planning a move. Hosting changes are covered on our website hosting page.

Frequently asked questions

Can I change my website without losing rankings?

Yes, in most cases, with careful planning. Some short term fluctuation is normal while search engines process the change. We do not guarantee rankings, but proper redirect mapping, pre launch checks and monitoring keep the risk low.

What is 301 redirect mapping?

It is a document that pairs each old URL with its closest new URL, so a permanent redirect can send visitors and search engines to the right place. It protects the search history and links each page has built.

How long should redirects stay in place?

Google recommends keeping them for at least a year. For visitors, keeping them longer is often sensible, as old links may continue to be used.

My developer says they will handle redirects. Do I still need SEO help?

Developers often handle the technical setup well. SEO support adds the audit, prioritisation, metadata checks and Search Console monitoring that protect rankings. We are happy to work alongside your developer.

How much does a migration cost?

Cost depends on the number of URLs, the type of migration and whether we also build the new site. We provide a written scope and quote first.

Do you work with organisations outside Auckland?

Yes. We work with organisations across New Zealand and internationally from our Remuera office.

Move with confidence

A website migration does not have to be a gamble. With a full URL audit, an accurate redirect map and careful checks before and after launch, you can change your website and keep the visibility you have earned.

Read feedback from organisations we have worked with on our verified Google Business Profile. Read our Google reviews

Net Branding Limited, 165 Orakei Road, Remuera, Auckland, New Zealand. Phone 09 523 0478 or email cathy@seocompanynz.com.

Ready to plan your move? Send us details of your current and new site, and we will prepare a written quote for an SEO safe migration.