There shall be a minimum distance of 20 feet between adjacent buildings containing residential dwellings for a minimum distance of 25 feet from the nearest internal road curb line exclusive of overhangs, eaves, cornices or similar architectural projections, stoops, landings, steps, decks, porches, chimneys. The minimum separating distances between living spaces at any other point between adjacent living areas shall be eight feet exclusive of overhangs, eaves, cornices or similar architectural projections, stoops, landings, steps, decks, porches, chimneys.