Demand for housing has been rising in the Montrose/River Oaks area in Houston, especially from renters. Rents rose there at a 9.1% annual rate in January.
The difference between Houston and a lot of other cities is that it is still easy to add housing in Houston's nice, central city neighborhoods (unless your project has "Ashby" in the title). There are currently 15 apartment projects with 4,300 units under construction in the Montrose/River Oaks area. That's not "announced" units; that's 4,300 units under construction. For point of reference, only 3,089 building permits were issued for housing units of any type in the entire San Jose-Sunnyvale-Santa Clara metropolitan area in 2011.
Houston has a lot of needless land-use controls, including excessive minimum-space requirements and parking minimums, but there really aren't many other places in the country where there is both strong demand for infill development and a regulatory environment that freely allows it.