Is it legal to change a neighborhood green to a plaza? According to which law can defend their legal rights and interests?

Community green into a square, need to convene a general meeting of owners, subject to the consent of the owners. Because the owners to buy a house is a contract of purchase, anyone without the consent of the owners (especially green to square such a major matter) shall not change the original appearance of the neighborhood. Owners with objections can complain to the Housing and Construction Commission or government departments, you can also file a lawsuit. Existing Property Law, Civil Code.