For purposes of the SR Zone, the following definitions shall apply:
ATTACHED DWELLING
A one-family dwelling unit attached to one or more one-family dwellings by common vertical walls.
DETACHED DWELLING
A one-family, freestanding dwelling unit.
PATIO HOME DWELLING
A one-family, detached dwelling unit on a separate lot with open space setbacks on three sides and with a court.
SEMIDETACHED DWELLING
A one-family dwelling attached to one other one-family dwelling by a common vertical wall, and each dwelling located on a separate lot.
SENIOR RESIDENTIAL DWELLING
A single-family dwelling unit intended, erected and restricted for the benefit of residents who are 55 years of age or older as permitted by federal housing regulations. Nothing herein shall prohibit a spouse residing in such development who is under the age of 55 years, provided that such spouse is married to and residing with a person who is a minimum of 55 years of age. No person under the age of 18 years shall be a resident of the SR Zone.
TOWNHOUSE DWELLING
A one-family dwelling unit in a row of at least three such units in which each unit has its own front and rear access to the outside; no unit is located over another unit; and each unit is separated from any other unit by one or more vertical common walls.
ZERO LOT LINE DWELLING
Not more than two patio homes attached to one another by a common vertical wall with each dwelling located on a separate lot.