Japanese sporting components manufacturer Shimano plans to nearly double the size of its distribution center in North Charleston.

Shimano American Corp., the company’s U.S. subsidiary, is adding almost 87,000 square feet to its 102,000-square-foot facility, including almost 3,000 square feet of offices, according to recent government filings.

Construction likely will begin later this summer and be finished by early next year, according to Larry Callahan, CEO of Pattillo Construction. The Georgia-based general contractor and developer, which built Shimano’s existing facility, is just waiting on a couple of final permits, Callahan said Tuesday.

“As soon as it comes back to us, we’ll get started,” he said.

An administrative assistant at the 9550 Palmetto Commerce Parkway operation said managers were on vacation Tuesday and couldn’t be reached for comment. A message left at Shimano American’s California headquarters wasn’t returned.

Callahan didn’t want to speculate on Shimano’s intentions for the new space but suggested it would mean more jobs. When Shimano commissioned the existing building in 2005, it had about 15 local employees. “They’re making new investment, and usually when they make new investment, that calls for more people,” Callahan said.

Details of the expansion were contained in Pattillo’s June 18 filing with the Charleston County. A state Department of Health and Environmental Control notice from last month said the facility’s parking area would also be expanded.

Shimano chose the Charleston region to serve its East Coast market in 2003, leasing a 25,000-square-foot warehouse in Ladson’s Benchmark Industrial Park.

Pattillo finished building Shimano’s current fishing reel and bicycle derailleur distribution facility in 2006. It cost about $5 million and was designed to accommodate the imminent expansion, according to a Shimano executive at the time. Callahan would not say how much the upcoming construction would cost. The Shimano expansion is just the latest project in Palmetto Commerce Park.

Boeing Co. opened its interiors factory there in December and has the option to buy some of its surrounding land from Pattillo. Aerospace composites manufacturer TIGHITCO announced last summer that it would employ 350 people at its new factory which expected to open by the end of this year. And there are several other data center and manufacturing projects in progress.

“The government really did the right thing opening this thing up,” Callahan said of the parkway.