Businesses using HubSpot can relate to this: the system rarely stays clean. Over time, new workflows are created, properties are added, integrations are connected, and marketing assets continue to grow.

Ever since HubSpot announced the legacy sandbox sunset, the entire community has been paying closer attention to auditing HubSpot portals to understand what actually exists inside them.

HubSpot legacy sandboxes sunset March 16, 2026. Here's your 5-phase migration checklist for the new Deploy to Production workflow.