This chapter is not intended to abrogate, render invalid or interfere with the application and administration of any other lawful statute, ordinance, regulation, easement, private agreement, covenant, deed restriction or other legal relationship, public or private. When this chapter imposes a greater restriction on the use of buildings or land or the heights of buildings or requires larger open spaces or makes any other greater requirement than is imposed or required by any other law, rule or regulation or by easements, covenants or agreements, the provisions of this chapter shall govern.