How to Transfer Multiple Websites to a New Host?

The safest way to transfer multiple websites is to inventory every site, create full backups, configure the new hosting environment, migrate and test each website separately, then change DNS in controlled stages while keeping the existing hosting available as a fallback.

Start with an inventory.

For each website, record:

• Domain and subdomains
• CMS or application
• File and database size
• PHP version
• SSL requirements
• DNS records
• Email services
• Redirects
• Scheduled tasks
• CDN or third-party integrations

This matters because two websites on the same account may have completely different technical requirements.

A sensible migration sequence is:

1. Create fresh backups of every website.
2. Store an independent backup outside the original hosting account.
3. Set up domains and databases on the new server.
4. Match important PHP and application requirements.
5. Transfer website files.
6. Import databases.
7. Update configuration and database credentials where required.
8. Install and verify SSL.
9. Test each website before changing DNS.
10. Change DNS once the new environment is confirmed.
11. Monitor both servers during the transition.

For larger portfolios, migrating websites in batches is usually easier to control than switching every domain at once.

Websites can usually be moved with little or no visible downtime by keeping the original server live while the new environment is prepared and tested. DNS is changed only after validation, allowing traffic to transition while the previous hosting remains available temporarily.

The principle is straightforward: copy before you switch.

Do not shut down the original hosting before the replacement is ready.

Test important functions on the new server first, including:

• Contact forms
• Logins
• Checkout
• Database connections
• Images
• HTTPS
• Redirects
• Third-party integrations

DNS TTL also matters. TTL determines how long DNS information may be cached before being checked again. Reducing an unusually long TTL before migration can help changes be recognised sooner, although DNS propagation cannot be controlled completely.

Dynamic websites require extra care.

If customers place orders or submit data while the database is being moved, changes made on the old server could be missed. Busy WooCommerce or membership websites may therefore require a final database synchronisation or a short maintenance window.

The real objective is not simply zero downtime. It is zero lost business data.

Changing hosting provider should not harm SEO when the same domain, URLs and content remain available. Problems usually occur when migration introduces downtime, server errors, broken redirects, indexing restrictions, missing resources or substantially poorer performance.

After the switch, crawl and review each website for:

• 404 errors
• 5xx server errors
• Broken links
• Missing redirects
• Incorrect canonical tags
• Accidental noindex directives
• HTTPS problems
• Missing images
• Changes to robots.txt
• Performance regressions

Hosting performance also matters commercially.

Faster NVMe storage can help database and file operations, but website speed depends on more than storage. CPU, available memory, PHP processing, caching, database efficiency, code quality and latency all contribute.

For businesses serving primarily Irish or European customers, infrastructure location and network latency should also form part of the hosting decision.

Before consolidating several websites, assess their combined storage, traffic, memory, database and CPU requirements rather than simply checking how many domains the hosting plan allows. A plan supporting many domains does not necessarily have enough resources for many demanding websites.

This distinction matters.

Several low-traffic brochure websites may comfortably share an account. Several WooCommerce stores, booking systems or high-traffic WordPress websites can create far greater processing and database demand.

Also consider the shared security boundary. If multiple websites sit inside the same hosting account, poor security on one installation can create additional risk for the others.

Backups, redundancy and recovery processes therefore matter just as much as the advertised domain allowance.

Email does not automatically move when website files are migrated. Businesses must identify where mailboxes are hosted and preserve the correct MX, SPF, DKIM and other DNS records so that changing web hosting does not unintentionally interrupt email delivery.

Some businesses use Microsoft 365 or Google Workspace, while others host email with their web hosting provider.

Document the current DNS configuration before making changes.

Pay particular attention to:

• MX records
• SPF
• DKIM
• DMARC
• Verification records
• Mail subdomains

This allows website hosting to change without unnecessarily affecting email.

For Irish businesses processing personal data, GDPR obligations also remain relevant during migration. You should understand where data is stored, who processes it and what contractual safeguards apply when infrastructure providers handle personal information.