household (average household size) decreasing from 2.63 to 2.59. This trend is reflected in Montgomery County. From 1990 to 2000 the US Census showed the number of persons per household in the unincorporated area of Montgomery County decreased from 2.6 to 2.5. For planning purposes, a continuation of this trend will be assumed with a lower figure of 2.3 persons per household used for the year 2030. Based on this assumption, the increase of 6,900 to 9,750 persons yields an increase of 3,000 to 4,200 dwelling units over the time period 2000 to 2030 calculated as follows: Low population projection (Virginia Employment Commission growth rates) for the unincorporated area: • 2030 population projection = 34,000, 2000 population = 27,109 • 34,000 (2030) 27,109 (2000) = 6,900 person increase 2000-2030 • 6,900 persons / 2.3 persons per household = 3,000 dwelling units Middle population projection (Blacksburg Comprehensive Plan growth rates) for the unincorporated area: • 2030 population projection = 36,100, 2000 population = 27,109 • 36,100 (2030) 27,109 (2000) = 9,000 person increase 2000-2030 • 9,000 persons / 2.3 persons per household = 3,900 dwelling units High population projection (1980-2000 Montgomery County 2025—Revised June 13, 2011
Planning & Land Use
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