In their interpretation and application, the provisions of this chapter shall be held to be the minimum requirements deemed necessary for the promotion of the public health, safety, comfort, convenience and general welfare. It is not intended by this chapter to repeal, abrogate, annul or in any way to impair or interfere with any easements, covenants or other agreements between parties; provided, however, that where this chapter imposes a greater restriction upon the use of buildings or premises or upon the height of buildings or requires larger yards, courts or other open spaces than are imposed or required by such easements, covenants or agreements, the provisions of this chapter shall control.