Can the owner agree that the residential property will change the green space into a parking space?

Don't say anything you did. This kind of behavior belongs to the transformation of green space and must be reported to the competent department of landscaping for approval. Don't think that all owners can do anything with their consent. Acts done in the community shall not violate laws and regulations. For example, your owners have all passed, turned into a dispatching room and set up a chemical plant. Even if your master agrees, these are unacceptable. Do you see it? What the owner and the property can do cannot cross the line. The landscaping of the community cannot be modified at will. Even if all the owners agree, it is not allowed to change. If all parks do this, there will be no green space in the city. So it must be approved by the government.