With relatively cheap operating costs for individual vehicles residential development can easily extend well beyond the job site. This trend was noted in the Metropolitan Development Blueprint and is further evidenced by population growth in the northern townships. For instance, Cannon and Plainfield Townships alone accounted for about 25 percent of the population growth in all Kent County townships from 1980 to 1990, and nearly 15 percent of the entire County's growth during that same period. Conversely, the development policies and orchards of Alpine Township has tended to keep development from spreading too far beyond Walker's northern border. Another factor that will influence future growth is market demand.
Residential builders react to the demand created by the market place.
The attractiveness of the city, due to its proximity to Grand Rapids, and easy access to other metropolitan areas, including Muskegon and Grand Haven, via I-96 and U.S. 131, along with its quality schools, and other factors has made the area a magnet for new residents and businesses. The range of development sites available, along with such factors as size, site amenities, access, availability, environmental restrictions, utilities, cost, zoning, etc., determine the ultimate market draw of the city. The 1990 median age jumped significantly from the 1980 figure of 27.8 to 31.3. Even though this was a large increase in a relatively short period of time, it is consistent with national demographics which show a rise in the median age. Especially dramatic is the growth of the 65 and over population, particularly when compared to the Under 5 years of age category.