This is a development technique in which a single-family detached dwelling is sited on one side lot line without a side yard, and the dwelling on the adjacent lot is sited on the side lot line furthest from the zero lot line. This technique is designed to provide greater flexibility for smaller lots, to enable higher density, to allow increased usable side yard area on lots, and to increase the opportunity for protecting solar access.
A. Standards. To ensure adequate light, air, privacy, and maintenance, zero lot line development shall be subject to the following standards in addition to the other standards in this chapter:
1. The lot adjacent to the zero setback side yard shall be under the same ownership at the time of initial construction.
2. The exterior wall of the zero lot line dwelling may be constructed at the lot line, and the eaves of the dwelling shall overhang no more than two feet.
3. Storm runoff from the zero lot line dwelling shall not drain onto the adjacent lot.
4. The side yard setback on the lot adjoining the zero setback side yard shall be at least 15 feet.
5. The side yard setback on the lot adjoining the zero setback side yard shall be kept perpetually free of permanent obstructions such as a tool shed or a fence without a gate.
6. An easement of five feet in width shall be provided on the adjoining lot for maintenance of the exterior portion of the lot line wall. To ensure privacy and usability of the adjacent lot, windows, and mechanical ventilation systems vents shall not be permitted in the lot line wall of the building.
7. A lot developed with a zero setback side yard may be as small as 5,000 square feet in area and may be as little as 50 feet in width at the building line.
8. A lot developed with a zero setback side yard must have no less than 1,700 square feet of total yard area unobstructed by buildings.
(Ord. 84-238 § 7.07, 11-5-1984)