Sec. 20-34. Determination of street address numbers.

(a) Address numbers shall be based on the location of an individual parcel within a block. For the purpose of this ordinance, blocks shall be determined as follows:

(1) Each segment of a street formed by intersecting streets shall be considered a separate block provided however, that where the distance between intersections is more than five hundred feet (500'), each five-hundred-foot interval shall establish a separate block.

(2) The above provision notwithstanding, blocks within subdivisions shall be construed to be the segment of a street between intersections.

(b) Except as otherwise specified herein, street address numbers shall be determined in accordance with the following:

(1) Proceeding from the point of beginning, even numbers shall be assigned to the parcels situated on the right sides of streets, and odd numbers shall be assigned to left sides.

(2) Numbering series shall begin with the number 100, and shall begin as follows:

a. Where a street begins at an arterial or collector road, then street numbering shall begin at that point of intersection.

b. Where a street crosses an arterial or collector road, or when a street connects and terminates at arterials or collector roads, then street numbering shall begin at the southernmost or westernmost end of that street. Provided, however, that where possible, street prefix designations (north, east, etc.) Shall be assigned to intersecting streets having the same name on either side of the arterial or collector and both segments shall be numbered as prescribed hereinabove, pursuant to section 15.1-379, Code of Virginia (1950), as amended.

(3) Numbers shall increase consecutively from said point of beginning, with two (2) numbers (one even and one odd) assigned or reserved for every fifty feet (50') of street frontage for single-family residential areas, and two (2) numbers reserved for every twenty-five feet (25') of frontage for commercial and multi-family area.

(4) Only those properties which have a principal structure shall be assigned a street address. Numbers shall be reserved, however, for vacant parcels in accordance with the intervals described above; provided, however, that in platted subdivisions, consecutive street numbers shall be assigned to consecutive lots rather than at the prescribed intervals. Additional numbers shall be reserved for over-sized lots within subdivisions based on zoning district frontage requirements to accommodate potential future divisions.

(c) For multi-family, commercial and similar development where density of development may render the above described addressing intervals ineffective, a building or building group may be assigned a single number and a numerical or alphabetical suffix may be assigned to each dwelling unit, business, or establishment within such building or building group.

(d) Nothing contained herein shall be construed to require the renumbering of existing streets merely because the existing even and odd numbers are transposed, nor shall it be required that streets within existing subdivisions be renumbered unless a substantial problem with existing addresses has been identified by the agent.

(e) Where major roads enter the county from another jurisdiction, street address numbers shall be assigned as a continuation of the numbering series used in that jurisdiction.