Pre rented or Pre-Leased commercial property which is leased out to Tenants for a mutually agreed lease period & terms & conditions in lieu of rent on monthly basis.
Normally standard lease period in commercial office space scenario is 9 years with 3-5 years of lock-in period with 15-20% escalation clause every three years. Usually ready to move in property where tenant is already occupied the space are considered pre rented properties but now a days under construction projects which has already signed verified lease with the potential tenants is also termed as pre-leased property. Pre rented commercial property is considered safest investment options in real estate segment as there is hardly any risk regarding your hard-earned money as property is already in physical form.

This concept implies to all commercial office spaces/ Retail Spaces which are leased out to international tenants or brands.
Usually ROI in commercial property (i.e. 6%-8%) is higher compared to residential pre-leased and commercial property tends to appreciate more in long run than residential properties.