In their interpretation and application, the provisions of this chapter shall be held to be the minimum adopted for the promotion of the public health, safety, comfort, convenience, and general welfare. It is not intended by this chapter to interfere with or abrogate or annul any easements, covenants or other agreements between parties; provided, however, that where this chapter imposes a greater restriction upon the use of a building or premises, or requires larger open spaces than are imposed or required by any other statute, local law, rule, regulation or permit, or by any easement, or agreement, the provisions of this chapter shall control.