Legal analysis: it is not illegal to open a studio in a residential area, but only if all interested owners and other owners of the whole building agree. Other owners who can prove that their house value and quality of life have been or may be adversely affected. It is illegal to change it into a business room, but it is not illegal if the studio is used for administrative office, communication, e-commerce, design planning, software development, management consulting and other activities that do not affect the normal life and business activities of residents.
Legal basis: Article 279th of the Civil Code of People's Republic of China (PRC). The owner shall not change the house into a business house in violation of laws, regulations and management regulations. If the owner changes the house into a business house, in addition to complying with laws, regulations and management regulations, it shall also be unanimously agreed by the interested owners.