A handful of buildings at the Pacific Northwest National Laboratory research campus that were being leased by Battelle have been sold for $72 million.

Steve Storrar, first vice president of the investment properties group for CB Richard Ellis in Seattle, brokered the deal with Hans Siebert of Newmark Realty Capital for Dick Hoch, of Sigma Financial Group in Kennewick.

"It was a very complicated transaction," said Storrar, adding that the deal had been in the works for more than three years.

The sale includes the Information Sciences Buildings at 3320 and 3350 Q Avenue, the Environmental Technology Building at 3200 Q Avenue, the National Security Building at 3230 Q Avenue and 620 Battelle Blvd., aka The Guest House at PNNL, which is used to house visiting scientists, interns and students.

The buildings were purchased by a group of investors put together by Mike Henry, who has been managing the buildings, Storrar said.

Greg Koller, of PNNL media relations, said Battelle would continue to lease and work in the buildings, which are part of PNNL's Environmental Molecular Science Laboratory.

"Nothing is expected to change," he said.

Collectively, the buildings, which were constructed from 1990 to 2001, provide more than 300,000 square feet of space.