The 2026 Website Migration SEO Checklist for NZ Businesses

A domain or website migration is one of the only SEO events that can undo years of accumulated rankings in a single afternoon. If a business launches a new website without a strict technical transition plan, search engines lose the ability to find their most valuable pages, resulting in an immediate drop in leads.

According to recent SEO industry data, 60% of website migrations result in measurable organic traffic loss due to basic technical oversights. Here is exactly how to structure your migration to protect your rankings, how to manage your .co.nz DNS settings, and the strict technical checklist your developer needs to follow.

Why do websites lose traffic during a migration?

Websites lose traffic during a migration because search engines rank individual URLs, not just the homepage. If you change a URL structure (for example, moving from adhesion.co.nz/services to adhesion.co.nz/what-we-do) without placing a permanent redirect, Google treats the original page as deleted. All the historical ranking authority and backlinks pointing to that specific page disappear instantly.

Furthermore, if the new website is blocked from being crawled by an accidental robots.txt command left over from the staging environment, your entire site will be de-indexed within days.

How do you map 301 redirects correctly?

Redirects are the technical spine of an SEO-safe migration. Every single URL that changes requires a 301 redirect pointing directly to its new equivalent.

• Audit your current assets: Use a crawling tool like Screaming Frog to export every live URL, meta title, and status code from your existing site before you touch anything.
• Enforce 1-to-1 mapping: Map the old URL to the exact new page. A common, catastrophic mistake is bulk-redirecting hundreds of deleted old pages directly to the homepage. Google's algorithm reads bulk homepage redirects as "Soft 404s" and drops the ranking equity.
• Use 301s, never 302s: Ensure the server uses a 301 (Permanent) redirect. A 302 (Temporary) redirect does not pass your historical SEO authority to the new URL.

How should you manage NZ domains and DNS settings during a launch?

When launching a new website, you must update your Domain Name System (DNS) records so your .co.nz domain points to the new server.

Because New Zealand internet service providers (ISPs) cache DNS records, a standard update can take up to 24 hours to propagate across local networks. To prevent downtime during business hours, log into your local registrar (such as Freeparking, Voyager, or domains.co.nz) 48 hours before your planned launch and lower your DNS Time To Live (TTL) setting to 300 seconds. This forces local networks to check for IP changes every five minutes, ensuring a near-instant cutover when you launch.

Additionally, if your migration involves moving domain hosts, you must ensure your MX (Mail Exchange) records are mapped perfectly before the transfer. Failing to transfer MX records will immediately break your email routing, cutting off your company's communication.

What happens to SEO when replatforming to Shopify?

If you are migrating from an open-source CMS like WordPress to a hosted platform like Shopify, your URL structures will forcefully change. Shopify enforces strict path hierarchies (e.g., all products must sit under /products/ and all categories under /collections/).

Because you cannot strip these prefixes out of a Shopify URL, your 301 redirect map is non-negotiable. If you fail to redirect your old, flat WordPress URLs to the new nested Shopify URLs, you will lose the rankings for your highest-converting product pages.

What is the Post-Launch SEO Checklist?

The hours immediately following a migration launch are critical. As soon as the new site is live, execute the following technical checks:

1. Test the redirects: Run your original Screaming Frog URL crawl list against the live site to ensure every old link successfully triggers a 301 and lands on a 200 (Active) page.
2. Submit to Google Search Console: Generate a new XML sitemap and submit it directly to your Google Search Console dashboard. This forces Googlebot to begin crawling the new URL structures immediately.
3. Use the Change of Address Tool: If your migration involved a complete rebrand and a change of root domain (e.g., moving from an old .co.nz to a global .com), you must submit a formal request via Google's official Change of Address tool.
4. Update your Local Citations: Ensure your Google Reviews and Business Profile point to the new HTTPS domain to maintain your local map rankings.

A failed website migration can cost thousands of dollars in lost organic revenue. Adhesion’s in-house development team strictly manages DNS cutovers, 301 redirects, and technical SEO for New Zealand businesses during complex replatforms. Contact us to ensure your next website launch protects your existing traffic.