Regulations controlling areas, yards, heights of building and open spaces, building and impervious lot coverage in Residential B Zones shall be the same as in Residential A Zones.

All yard setbacks shall be measured from the nearest point of the exterior building wall to the property line.

No two-family dwelling hereafter erected or altered shall occupy a ground area of less than 1,400 square feet, exclusive of porches and garages, where all living spaces are located on one floor, and not less than 700 square feet per floor where living spaces are equally divided on two floors. To constitute a second floor containing 700 square feet, 75% of the floor area shall have a ceiling height of not less than seven feet six (7'6") inches. Finished living spaces in basements or attics shall not constitute any part of the required area. The above requirements shall apply to any proposed alteration of a one-family dwelling to a two-family dwelling.