In interpreting and applying the provisions of this chapter they shall be held to be the minimum requirements for the promotion of the public health, safety, convenience, comfort and general welfare. It is not intended by this chapter to interfere with or abrogate or annul any easement, covenant or other agreement between parties; provided, however, that when this chapter imposes a greater restriction on the use of buildings or land or on the heights of buildings or requires larger open spaces, or makes any other greater requirements than any imposed or required by any other ordinance, rule, regulation, or by easements, covenants, or agreements, the provisions of this chapter shall control. Where the requirements of this chapter differ from the requirements of another ordinance, the more restrictive shall govern.