Understanding how defit and fitout work is critical for any business managing a lease transition. Whether you are closing a tenancy, relocating, or preparing a new commercial space, a guide to defit and fitout helps you avoid costly mistakes, delays, and compliance issues. These two processes are often discussed together, but they serve very different purposes within the lifecycle of a commercial property. This article explains how defit and fitout differ, when each applies, and how businesses across Perth typically manage both without disruption.