AUSTIN—More and more tech firms--not just Apple--are eying Austin for office space, according to a new report released by CBRE Group Inc.

Businesses looking for office space in the nation's hottest tech markets should expect to pay a premium, says the report, which analyzed the top 30 tech cities across the U.S. and Canada. The report showed an aggregate rent premium of 11 percent across all 30 markets—a number that jumps significantly higher in the hottest tech submarkets. Austin ranks third among the top tech markets, behind San Francisco and Phoenix, for its significant growth in high-tech jobs—33 percent from 2012-2014.

“The area's booming IT industry and a recent surge in development will continue to fuel the expansion of Austin in the coming years,” Gary Goodman, senior vice president acquisitions at Passco Cos., told GlobeSt.com. “In fact high tech employment is up 30 percent since 2010, contributing to the area's low unemployment rate of only 3.5 percent, which is far below the current U.S. national average,”