Houston is a regional, national and international center for the oil and gas industry. A healthy oil and gas industry is a major component of Houston's growing economy. And that, in turn, creates a strong demand for quality housing.
Check out this great article about Houston's oil and gas industry written by Dr. Robert Gilmer and published in Tierra Grande, the real estate magazine from Texas A&M. Dr. Gilmer is the economist who was formerly with the Dallas Federal Reserve, and who now heads up the Institute for Regional Forecasting at the University of Houston.