Subletting your office space or commercial property? Easily customize your own Commercial Sublease Agreement.Here you'll find answers to the most frequently asked questions, downloadable forms to help you manage your lease, and essential telephone numbers. A commercial sublease is the act of a tenant re-renting space they currently lease to a subtenant. The tenant is required to obtain the consent of the landlord. Check 5500 SF Sublease Available in Middlesex County space availability, located at 1 S Middlesex Ave, Monroe Township, NJ 08831. If Subtenant shall take occupancy of the Sublease Premises for the conduct of Subtenant's business, Sublandlord's Work shall be deemed substantially completed. 1.Sublease of Subleased Premises. Also, when commercial tenants sublease their business premises, they involve another party in the commercial lease process.