If the house or mobile home was owned or being bought, but the land on which it sits was not, the respondent was asked to estimate the combined value of the house or mobile home and the land. For vacant units, value was the price asked for the property. The median divides the value distribution into two equal parts.
Quartiles divide the value distribution into four equal parts.
These measures are rounded to the nearest hundred dollars. Mean value is rounded to the nearest hundred dollars. Mobile homes were excluded. For 1990, quartiles have been added because the range of values and rents in the United States has increased in recent years. Upper and lower quartiles can be used to note large value and rent differences among various geographic areas.