The interpretation and the application of the provisions of this chapter shall be held to be the minimum requirements for the promotion of the health, safety, morals and general welfare. They are not intended to interfere with or to abrogate or annul other rules, regulations, local laws or ordinances, provided that, where this chapter imposes greater restrictions upon the use of buildings or premises or upon the height or bulk of a building or requires larger open spaces, the provisions of this chapter shall apply.