Investor property inspections are performed prior to purchase as well as periodically during ownership. Pre-purchase inspections are performed to identify defects prior to taking ownership to negotiate repairs or price adjustments which reflect the condition of the property. Periodic inspections for properties currently in your portfolio would ensure the identification of needed repairs following say a long term tenant's departure. Long-term tenants sometimes neglect to mention repairs and/or abuse the property during their tenancy. Identifying those problems early is the key to profitable ownership.