Westshore's current rents for class A office space averages $30 per square foot, the highest in the Tampa Bay market and a full $5 over the local average, according to Cushman & Wakefield of Florida. Vacancy in the submarket, previously in low single-digit range during good times, measured 16.7% through the first quarter.

One advantage Corporate Center Four has over its nearest new building, the 250,000-square-foot MetWest International across Boy Scout Boulevard, is that it has three siblings preceding it. Crescent has developed nearly one million square feet near the International Plaza mall over the past decade, with Corporate Center One opening in 1999.

"We have a history as to what we have been able to do," Bragg says, noting that prospective tenants have been able to visit Corporate Center Two and Three to get a better idea of how their space will turn out in the newest building. "We've also been able to develop relationships and keep them."

Another marketing point, she says, is that some companies are forced to look to newer space because they are unable to grow or consolidate in their existing buildings. New space offers tenants the opportunity to move into contiguous space as soon as it is ready for occupancy, she says.

Corporate Center Four is seeking LEED certification and expects to complete the process this summer. The building is now 55% leased.