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.Subletting your office space or commercial property? Easily customize your own Commercial Sublease Agreement. Location: 320 Old Country Rd., Suite 103, Garden City Size of Space: Spacious with large windows Over his career, Wayne has participated in the marketing and leasing of nearly 12 million square feet of urban and suburban commercial real estate properties. Possession and use of the rental property from the original tenant, under a sublease contract. Affidavit and Claim form to fill out.