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, except that where this chapter imposes a greater restriction upon the use of buildings or land or upon the erection, construction, establishment, moving, alteration, location or enlargement of buildings than is imposed by easements, covenants or agreements, or by public ordinances, rules, regulations, licenses, certificates or other authorizations, the provisions of this chapter shall prevail.