In interpreting and applying the provision of this ordinance, these shall be held to be the minimum requirements for the promotion of the public safety, health, convenience, comfort, morals, prosperity and general welfare. It is not intended by this ordinance to interfere with or abrogate or annul any ordinance, rules, regulations, or permits previously adopted or issued and not in conflict with any of the provisions of this ordinance, or which shall be adopted or issued pursuant to law relating to the use of buildings or premises and likewise not in conflict with this ordinance, nor is it intended by this ordinance to interfere with or abrogate or annul any easement, covenants or other agreements between parties; provided, however, that where this ordinance imposes a greater restriction upon the use of buildings or land or upon the height of buildings or requires larger open spaces or larger lot areas than are imposed or required by such ordinance or agreements, the provisions of this ordinance shall control.