This chapter establishes the minimum requirements for the promotion of the public safety, health, convenience, comfort, prosperity or general welfare. It is not intended to interfere with or abrogate or annul any easement, covenant or other agreement; however, where this chapter imposes a greater restriction upon the use of buildings or premises or upon height of buildings or requires larger open spaces than are imposed or required by another ordinance, rule, regulation or by easement, covenant or agreement, the provisions of this chapter shall control.