In their interpretation and application, the provisions of this chapter 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 structures or land or on the height of structures, or requires larger open spaces, or imposes any higher standards than are imposed or required by any other statute, law, ordinance, rule, or regulation or by any easement, covenant, or agreement, the provisions of this chapter shall control. Where the requirements of this chapter differ from the requirements of another statute, law, ordinance, rule, or regulation, the more restrictive shall govern.