The provisions of this chapter shall be held to be the minimum requirements for the promotion of the public safety, health, morals, or general welfare. It is not intended by this chapter to interfere with or abrogate or annul any easements, covenants, or other agreements between parties. Where this chapter imposes a greater restriction upon the use of buildings or premises, or upon the heights of buildings, or requires larger yards and open spaces than are required in other ordinances, codes, regulations, easements, covenants, or agreements, the provisions of this chapter shall govern.