What is an Umbraco migration and when do you need one?
An Umbraco migration is the process of moving a website to Umbraco CMS from another platform (WordPress, Sitecore, Drupal, or custom-built systems), or upgrading an existing Umbraco site from an older version to a current Long Term Support (LTS) release. Migrations are necessary when your current platform reaches end-of-life, when security vulnerabilities can no longer be patched, or when the cost of maintaining legacy code exceeds the cost of rebuilding.
According to Umbraco's official lifecycle policy, Umbraco 8 reached end of extended support in February 2025. Umbraco 10 LTS support ends in June 2025, Umbraco 13 LTS support ends in December 2026. Sites running unsupported versions no longer receive security patches, which creates compliance and liability risks. particularly for organisations handling personal data under UK GDPR.
Simon Antony Limited has completed Umbraco migrations across every major version from v4 through v17. We've migrated sites from WordPress, Classic ASP, Sitecore, and bespoke .NET Framework applications, each with different technical challenges and data migration requirements.
What does an Umbraco migration involve?
Content migration
Extracting content from the source CMS and mapping it to Umbraco document types. This includes page content, media files, metadata, URL structures, and internal links. We write custom import scripts rather than relying on manual copy-paste, which ensures accuracy and allows rollback.
Template and design migration
Converting existing designs from the source platform's template language (PHP/Twig for WordPress, XSLT for older Umbraco, JSP for Sitecore) to Umbraco's Razor/C# view engine.
Custom functionality
Rebuilding platform-specific features (search, forms, API integrations, authentication) using Umbraco's native patterns and ASP.NET Core middleware.
URL preservation
Implementing 301 redirects for every page to preserve search engine equity. A failed redirect strategy can cost months of organic traffic.
Testing and cutover
Parallel running on a staging environment, followed by a planned switchover with DNS cutover during low-traffic hours.
Which platforms do you migrate to Umbraco?
We've completed migrations from all major CMS platforms to Umbraco:
WordPress to Umbraco — The most common migration path. WordPress sites that have outgrown their plugin-dependent architecture benefit from Umbraco's custom-coded flexibility. We export WordPress content via WP-CLI, map custom post types to Umbraco document types, and rebuild theme functionality in Razor. Typical timeline: 6-10 weeks for a 50-100 page site.
Sitecore to Umbraco — For organisations that want enterprise CMS capability without Sitecore's licensing costs (which can exceed GBP 40,000 per year according to industry benchmarks). We map Sitecore templates and sublayouts to Umbraco document types and partial views.
Classic ASP / legacy .NET to Umbraco — The most technically complex migration path. We've migrated 15+ year old Classic ASP applications with SQL Server backends to modern Umbraco on .NET Core, preserving business logic and data integrity throughout.
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- Improved security.
- Access to new features.
- Enhanced performance and scalability.
Simon Antony Limited successfully completed a complex migration and upgrade for Agrii, transitioning their outdated Umbraco platform to the latest version. The project included seamless data migration, performance optimisation, and integration of new features, resulting in a secure, high-performing, and future-proof website.
Simon Antony Limited exceeded our expectations during the migration and upgrade of our Umbraco website. Their expertise ensured a smooth transition with zero downtime, and the enhancements have significantly improved our site's performance and user experience.
The new features and improved security have future-proofed our platform, making it ready for ongoing growth. We couldn’t have asked for a better partner for this critical project.
"Simon Antony Limited made our migration to Umbraco effortless. The team's expertise ensured our site remained fully functional during the transition!"
Agrii
Frequently asked questions about Umbraco migrations
Get answers to some of the most common questions about our services, expertise, and how we can help with your Umbraco migration projects.
Your Website, in Safe Hands
Keeping your website running smoothly while focusing on your business can be overwhelming—we get it. That’s where we come in. Think of us as part of your team—handling the technical stuff so you don’t have to.
What can I expect?
Reliable support to keep your website secure and optimised
Regular updates, backups, and performance tweaks
Tailored plans designed to suit your needs
Priority care with limited availability
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