Can the property be demolished at will and turned into a garbage pond? Is it legal?

can't, illegal. According to the property law of the People's Republic of China, the green space in the residential area belongs to the owner, and it is not allowed to destroy the green space to build a garbage pool before obtaining the owner's consent. Property management company is an enterprise-type economic entity established in accordance with legal procedures and with corresponding qualifications, and is an independent enterprise legal person. It belongs to a service enterprise, and it has an equal subject relationship with the owners or users. It accepts the entrustment of the owners, implements professional management of the properties in a specific area in accordance with the provisions of relevant laws and regulations or the contract, and receives corresponding remuneration, and accepts the supervision of the owners' committee and all owners.