The following procedures and processes are provided for the express purpose of determining addresses for premises.
   (a)   Address Grid Map. The Address Grid Map of Loudoun County provides for the establishment of unique primary addresses throughout the County by dividing the County into address ranges, from 30000 to 48000 (west to east) and from 10000 to 27000 (north to south). Such numbering system is coincident with the Virginia Coordinate Grid System, 1927 datum.
   (b)   Application of Grid to County. The Address Grid Map of Loudoun County shall be applied to the Street Name Map of Loudoun County. The actual address number range for each street segment shall be generated from the addressing grid. Final interpretations of the address grid and application to the Street Name Map rest with the Director.
   (c)   Uniform Assignment of Street Numbers. Street numbers shall be uniformly assigned, with numbers increasing from north to south and west to east as shown on the Street Name Map of Loudoun County. The directional orientation of a street shall be determined by the Department. Numbers on the north side of east-west streets shall be even, and numbers on the south side of such streets shall be odd. Numbers on the east side of north-south streets shall be even and numbers on the west side of such streets shall be odd.
   (d)   Uniform Increments/Decrements. All addresses of premises issued on a given travelway shall increment/decrement uniformly. All reasonable effort shall be made to have addresses uniformly increment/decrement with respect to addresses on the opposite side of a street.
(Ord. 92-01. Passed 1-21-92.)
   (e)   Use of Access Points. Primary addresses shall be assigned to the street from which the primary access originates. A premises address shall be determined numerically from the address range for the named street segment which the driveway serving the premises intersects. Whenever five or more premises or potential premises (vacant lots) are involved with a private lane, driveway or ingress/egress easement, except for single-owner private access easements, a name shall be applied to such travelway as provided in Chapter 1020, and all addressable structures accessing that main travelway shall be addressed from such travelway.
(Ord. 94-09. Passed 4-20-94.)
   (f)   Premises with Multiple Access Points. An addressable structure shall be addressed from the named travelway which provides primary access. Primary access shall be determined as the all- weather access by the shortest practical route.
   (g)   Corner Lots. The addressable structure on a corner lot shall be addressed based on the street providing vehicular access (a driveway). When the driveway intersects with more than one street, the Director shall have the final determination of the most appropriate travelway on which to base an address. The Director shall be guided by such factors as driveway distance and the street name towards which the house faces.
   (h)   Commercial, Industrial, Institutional and Multifamily Buildings.
      (1)   Primary addresses.
         A.   Commercial, industrial and institutional structures shall carry one unique primary address per addressable structure.
         B.   Each primary entrance of a multifamily residential structure shall be assigned a unique street number (primary address).
         C.   The primary and secondary entrances to multifamily dwellings and commercial, industrial and institutional buildings shall be clearly identified on the address plat.
      (2)   Secondary addresses.
         A.   Individual units (businesses) within a commercial, industrial or institutional structure shall be addressed using secondary unit numbers, regardless of interior and exterior access points. The owner of an industrial, commercial or institutional building shall be responsible for assignment of the secondary addresses. Such assignment shall be made in accordance with this chapter and within thirty days of a request from a tenant or before occupancy, whichever comes first.
         B.   Secondary unit numbers shall consist of three digits. For multi-story structures exceeding nine stories, four-digit numbers shall be assigned. In cases where basements require secondary addresses, the three-digit number shall begin with “0.” The two right-most digits shall represent the unit number. The left-most digit shall represent the floor number (or the two left- most digits for four-digit assignments).
         C.   For multifamily residential structures with units accessed directly from the primary entrance and/or stairway from the primary entrance, secondary numbering shall begin to the left side of the entrance-way and proceed sequentially in a clockwise direction from the commencement point.
         D.   For units accessed by interior hallways (e.g., shopping malls), secondary numbers shall be assigned with even numbers on the north and east sides and odd numbers on the south and west sides of interior hallways. The numbering sequence shall begin at the primary entrance.
            (Guidelines for determining secondary addresses in commercial, industrial and institutional buildings and structures are contained in Appendix I at the end of this chapter.)
(Ord. 92-01. Passed 1-21-92.)
         E.   For single-owner private access easements with more than one addressable structure, secondary numbers shall be assigned sequentially using every other number in accordance with Appendix III at the end of this chapter.
(Ord. 94-09. Passed 4-20-94.)
   (i)   Temporary Addresses. Temporary addresses shall be available only for construction mobile home trailer offices and for similar purposes. Anyone desiring a temporary address shall execute an agreement with the Department that acknowledges that the address being provided is a temporary address to be used for not more than one year from the date of issuance.
      To obtain a temporary address, the applicant shall provide a small area map which contains the location of the temporary addressable structure, the nature of the temporary addressable structure and the vehicular path by which one can access the temporary addressable structure from the closest named travelway.
(Ord. 92-01. Passed 1-21-92.)