In interpreting and applying the provisions of this chapter, they shall be held to be minimum requirements for the promotion of the public health, safety, comfort, convenience and general welfare. Where the provisions of this chapter impose greater restrictions than those of any statute, other ordinance, or regulation, the provisions of this chapter shall be controlling. Where the provisions of any statute, other ordinance or regulation impose greater restrictions than this chapter, the provisions of such statute, ordinance, or regulation shall be controlling.