Costco – Westhill – Opening Hours & Store Details Visit your local Costco branch in Arnhall Business Park on Endeavour Dr, approximately a 0.61 mile distance south of the centre of Westhill (not far from Hallin Industrial and Kingshill Business Park). The store mainly provides service to customers from the areas of North Lasts, Hillhead of Carnie, Wester Ord, Elrick, Mason Lodge, Mill of The Brotherfield and Westhill Town Centre. Refer to this page for the specifics on Costco Westhill, including the business times, location description, direct telephone and more beneficial information.