Detailed plans for Perth's third Costco, located in Alkimos, have been lodged with State planning authorities and are now open for public comment. The store, which will be the city's first north of the Swan River, is proposed for Romeo Road, just over one kilometre south-east of the Alkimos train station.
The 14,234-square-metre warehouse will slightly exceed the size of the Perth Airport Costco and will include 870 parking bays. Operating hours are set for 10am to 8:30pm Monday to Friday, 9am to 6:30pm Saturday, and 10am to 6pm Sunday. A Costco fuel station, strictly for petrol with no convenience store, is planned for the north-east corner of the site.
In-store offerings will include a sushi bar, bakery, rotisserie, optometrist, hearing aid services, and a vehicle tyre repair and fitting centre. The global membership-only retailer sells bulk goods such as groceries, liquor, furniture, electronics, homewares, toys, apparel, books, and health and beauty products.
The Alkimos Costco will anchor the new 24-hectare Home X Trade Hub, where the Government recently sought expressions of interest for 17 additional commercial lots. Costco opened its first Australian store in 2009, its first Perth location at Perth Airport in March 2020, and its second in Casuarina in December 2022.
Costco country manager Chris Tingman said last October that Alkimos was chosen for its dynamic and fast-growing community. The suburb's population is expected to exceed 45,000 by 2035. Public consultation is open through the City of Wanneroo until Friday, March 13, after which the Metro Outer Development Assessment Panel will determine the application.



