In the southern region of New Hampshire and on the Seacoast, vacancy rates are low, housing prices are high, and there is a lack of affordable housing for families and young adults. In the northern and western parts of the state, substandard housing remains a problem. As part of the The Balance series on NHPR about the cost of living in the Granite State, we look at why our state continues to have issues, and how some cities, like Londonderry , are turning to mixed community developments. This