From the Houston Business Journal:  Despiet concerns that home prices will fall due to the oil slump, projections from Esri, a geographic information systems company, show that the number of Houston homes valued $250,000 and greater will increase by more than 40 percent by 2020.

The Houston Business Journal analyzed this data and found that the entire Houston area will add more than 130,000 owner-occupied houseing units between 2015 and 2020, an increase of approximately 10 percent.  Homes valued above $250,000 and greater will increase by more than 40 percent by 2020.

You can find more economic data on this subject and read the entire article here.