FORT WORTH — Costco Wholesale, the Seattle-based membership warehouse club, is under contract to buy 17 acres in the Presidio Junction development in far north Fort Worth, where it plans its fourth Tarrant County location.Steve McArthur, a real estate broker with Northwest Atlantic who works with Costco in the Texas market, said the company will begin construction as soon as LNR Property Corp., Presidio’s developer, finishes some infrastructure work. Once that is complete, it will take Costco about four months to build the store, he said.McArthur said the store will likely open in late spring 2014. The site, 8900 Tehama Ridge Parkway, is on the west side of Interstate 35W and south of North Tarrant Parkway, across from Alliance Town Center."We’re expanding in a lot of areas in Texas," McArthur said. "That’s one area we know has good housing growth."Building permits issued by Fort Worth show that the store will be 153,847 square feet and cost $11 million to build.It will have about 200 employees, with half working full time, McArthur said. Costco also has stores in Arlington, Southlake and southwest Fort Worth.Presidio Junction is a 300-acre master-planned community being developed by Newport Beach, Calif.-based LNR, which bought the land in 2007. LNR has planned 1 million square feet for shops and restaurants, 1,300 apartments and 750,000 square feet for a hotel, a fitness center and Class A office space.LNR has developed the Wyatt at Presidio Junction apartment community and sold land to Lowe’s Home Centers in 2008. A store has not yet been built.