Google Inc. will move into about 140,000 square feet of space outside downtown Ann Arbor in the third or fourth quarter next year.

The Internet giant confirmed Friday afternoon that it will occupy a 67,000-square-foot building in the Traverwood Business Park north of Plymouth Road and west of Huron Parkway and build an additional building on the campus.

The existing building is owned by Ann Arbor-based developer First Martin Corp. Phone and text messages to company Vice President Mike Martin were not immediately returned Friday afternoon.

Mountain View, Calif.-based Google does not disclose employment projections.

The Detroit Free Press first reported the deal.

Google currently leases 85,000 square feet on the second through fifth floors of the 137,000-square-foot McKinley Towne Centre office building at 401-407 E. Liberty St. in downtown Ann Arbor, according to CoStar Group Inc., a Washington, D.C.-based real estate information service. That building is owned by Ann Arbor-based McKinley Inc.

“Google has had a wonderful home in Ann Arbor since 2006, and we're thrilled to continue to grow here,” Mike Miller, who heads the Ann Arbor office, said in a company-provided statement. “We're excited to move to the north side of the city and create a campus. We're looking forward to getting to know our new neighborhood.”

McKinley CEO Albert Berriz said he expects to have Google’s space filled by another tenant quickly. “We have had a lot of interest,” he said. “They hadn’t told us what they were going to do, but they had been indicating they were looking for larger space.”

He said five possible tenants have expressed interest in occupying a part of the space, and one has expressed interest in occupying all of it.

“I’m glad (Google is) staying in Ann Arbor and I’m glad they found a solution for a larger campus," he said.

Google’s lease in the building, into which it first moved in 2006, expires in October, according to CoStar.

There are more than 400 Google employees in the space, primarily sales employees for its AdWords advertising program.

Work on the new space is expected to begin in the coming months, with occupancy expected in the third or fourth quarter next year.

In addition, MLive.com reported last month that Google is leasing 30,000 square feet in the 155,000-square-foot South State Commons II office building, which is owned by Ann Arbor-based Mav Development Co. That space will be used for employees until the company can move into the new campus.

A general contractor and architect for the project have not yet been selected.

The Ann Arbor office of CBRE Inc. represented Google in the Traverwood deal.