Umbraco V13 to V17 Planning Guide for High-Trust Organisations

A standard V13 to V17 upgrade takes four to five weeks from kick-off to go-live. This covers the full platform migration, testing and QA across environments, and knowledge transfer for your team. *More complex architecture? Book a call to discuss your perfect upgrade path, transparent fee, and timeline.

Cogworks offers a fixed-price V13 to V17 upgrade from £14,999. The price is agreed before work begins and doesn't change. More complex architectures with custom extensions or third-party integrations may require additional scoping - we'll tell you upfront before you commit.

Umbraco V13 reaches full end of life on December 14, 2026. It has been in security-only mode since December 14, 2025, meaning no bug fixes, no performance updates and no new features are being issued.

Yes. V13 to V17 is a direct LTS-to-LTS upgrade path. It's the recommended route for V13 organisations and the one Cogworks delivers as a fixed-price and timeline.

After December 2026, Umbraco stops issuing security patches for V13. Vulnerabilities discovered after that date are yours to find and fix without official support. For organisations handling personal data, financial transactions or operating in regulated sectors, this becomes a compliance exposure.

Some custom Backoffice extensions will need updating for V17, particularly bespoke dashboards, custom property editors, and uSync.Complete users. Third-party plugins should also be checked for compatibility. Cogworks assesses every extension upfront before any upgrade work begins.

The key differences are security support (V13 ends December 2026, V17 runs to November 2028), technology stack (.NET 8 vs .NET 10), Backoffice architecture (AngularJS vs modern Web Components), editorial scalability (single server vs load balanced), and AI readiness (none on V13 vs full MCP Server and AI tools on V17).