In interpreting and applying this chapter, the requirements contained herein are declared to be the minimum requirements for the protection and promotion of the public health, safety, morals, comfort, convenience and general welfare. This chapter shall not be deemed to affect in any manner whatsoever any easements, covenants or other agreements between parties; provided, however, that where this chapter imposes a greater restriction upon the use of buildings or land, or upon the erection, construction, establishment, moving, alteration or enlargement of buildings, than are imposed by other ordinances, rules, regulations, licenses, certificates or other authorizations, or by easements or covenants or agreements, the provisions of this chapter shall prevail.