Zoning district lines are intended to follow street center lines, streams and lot lines unless otherwise indicated by dimensions. Dimensions are in feet, measured horizontally and measured from the street right-of-way line even if the center line of that street serves as a zoning district line. The location of any disputed zoning district line shall be determined by the Board of Adjustment. Zoning district lines extend vertically in both directions from ground level.

Where a zoning district line divides a lot, the use of one district may be extended into the other for a distance no greater than 20 feet, provided the property line lies within that 20 feet. The extended use shall thereafter be a permitted use in the extended area.

Where a street or public way serves as the zoning district line and it is lawfully vacated, the former center line shall be considered the zoning district line.