HOUSTON — Even first-time visitors here can tell that the city is growing rapidly. Construction cranes overhang office and apartment sites all along the Katy Freeway, a stretch of Interstate 10 that connects a string of booming submarkets west of the 610 Loop. This expanse includes the Westchase neighborhood and the Energy Corridor, home to an expanding cluster of energy companies.

The energy sector drives job growth and all manner of business activity here, with the greatest demand for office space concentrated in the west side where oil and gas companies are clustered, in the medical center just south of the central business district and in the Woodlands, a master-planned community 27 miles north of downtown.

“Houston is clearly a growth leader,” said Walter Page, director of office research at Property and Portfolio Research in Boston. “It was the first major economy in the U.S. to register more jobs than it lost in the recession.” Employment here is up 3.7 percent since August 2008, when it peaked before declining during the recession. That compares with New York’s gain of just 0.7 percent from its peak in April 2008 before declining, Mr. Page said.

The city’s office vacancy rate was 11.9 percent in the third quarter, down from 13.4 percent a year earlier, according to the CoStar Group, a real estate research firm in Washington. Developers are creating new space to meet that strong demand, completing 15 major office buildings in the first three quarters of this year alone. Of the 3.9 million square feet of office space under construction, more than 90 percent is in the western submarkets or in the Woodlands, Mr. Page said.