Costco is opening its largest warehouse in Idaho’s Treasure Valley this November, but there’s more to the story than a new place to shop. The massive store in South Meridian is part of a much larger development that will bring new businesses and homes to the growing community.
According to Costco‘s official website, the new warehouse is scheduled to open on Thursday, November 5, 2026, at 203 E. Tower Lane, near the intersection of Meridian and Lake Hazel roads.
According to the Idaho Statesman, the approximately 200,000-square-foot warehouse will be the largest Costco in the Treasure Valley, a region that includes Boise, Meridian and several rapidly growing communities. It will also become Costco’s fourth location in the area, joining existing warehouses in Boise, Meridian and Nampa.
The new warehouse will have approximately 900 parking spaces and a gas station with 16 pumps. Its size also reflects a behind-the-scenes fulfillment center designed to handle deliveries of large items to customers’ homes, as reported by BoiseDev.
But the changes won’t stop at the warehouse itself. According to the Idaho Statesman, the new Costco is part of Pinnacle, an approximately 800-acre development by Brighton Corporation. Plans for the surrounding area include seven additional commercial buildings, houses and apartments, although some parts of the project are still awaiting approval.
Plans for the land surrounding Costco include seven additional commercial buildings and residential development across approximately 130 acres. The project is also bringing changes to local roads. Developers are widening part of Meridian Road between Lake Hazel and Columbia roads and installing two new traffic signals to accommodate future traffic.
For shoppers eager to visit, the opening celebrations will begin early. The Kuna Chamber of Commerce has scheduled a ribbon-cutting ceremony for 7:30 a.m. on November 5, with the warehouse expected to open at 8 a.m.
The new location will offer a pharmacy, optical department, hearing aid center, tire services and gas station, according to Costco’s official announcement.
There’s also an incentive for new members. Costco is offering eligible customers a $20 Digital Costco Shop Card when they sign up for a Gold Star membership, or a $40 card with an Executive membership. The promotion runs through December 6 and requires automatic renewal, among other conditions.
For residents of South Meridian and nearby Kuna, the new Costco will make everyday shopping a little more convenient. And with more businesses and housing planned for the area, it’s just the beginning of some big changes to the neighborhood.
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