Your place of business will be as per Section 2(85)(b) of CGST Act as you have no fixed establishment at the place where commercial property is located.
Section 2(85) of CGST Act “place of business” includes -
(a) a place from where the business is ordinarily carried on, and includes a warehouse, a godown or any other place where a taxable person stores his goods, supplies or receives goods or services or both; or
(b) a place where a taxable person maintains his books of account; or
(c) a place where a taxable person is engaged in business through an agent, by whatever name called;
Section 2(50) of CGST Act “fixed establishment” means a place (other than the registered place of business) which is characterised by a sufficient degree of permanence and suitable structure in terms of human and technical resources to supply services, or to receive and use services for its own needs;