(a) Zero lot line housing may be constructed in the R-7.5, R-5, and R-3.5 residential districts.
(b) The minimum lot and yard dimensions shall be the underlying district requirements for duplex units, except that a side or a rear yard, or both, need not be provided, and corner lots in a zero lot line project shall have a minimum lot width of 10 feet more than the underlying district minimum lot width for duplex units.
(c) The maximum building area shall be 50 percent of the zoning lot.
(d) The maximum building height shall be the underlying district requirements.
(e) Height setbacks on the zero lot line shall be measured from 5 feet on the other side of the property line.
(f) The following siting standards shall be applied to all zero lot line housing projects:
(1) To create useful outdoor areas, dwelling units may be sited on any side or rear lot line, or both;
(2) Dwelling units shall not be sited on lot lines between a zero lot line dwelling and a lot not included in the project;
(3) A minimum distance equivalent to double the yard requirement in the underlying zoning district shall be maintained between any two dwelling units. This requirement can be met entirely on one zoning lot or shared between the lots. This control shall be made a part of deed restrictions as a use easement; and
(4) Siting of dwelling units shall be staggered a minimum of 2 feet on adjacent zoning lots. Setbacks shall be varied in a random manner to avoid repetition.
(g) Walls of structures built along the lot line shall not contain windows, doors, or other openings, except that windows may be allowed for light and ventilation purposes; provided that the height from window sill to finished floor shall be at least 6 feet.
(h) For the purposes of construction, upkeep, and repair of structures located on a lot line, a minimum 5 foot maintenance easement shall be recorded between the owner of the property containing the structure and the owner of the property where entry must take place.
(i) All zoning lots within a zero lot line housing project shall carry a record of agreement or deed restriction limiting the use of the lots to zero lot line housing, including all restrictions on yards.
(j) The director may establish supplemental design guidelines further illustrating the above site design standards.
(1990 Code, Ch. 21, Art. 8, § 21-8.40-2) (Added by Ord. 99-12)