The long-stalled Costco store in Brentwood opened on Friday, the chain’s largest in Contra Costa County.

Costco's grand opening of their Brentwood store, the wholesale chain's largest in the state of California, brought out people from across the region. Here's what these shoppers had their eyes on.

Brentwood, CA, celebrates the opening of California's largest Costco, hoping it will ease commutes and spur economic growth.

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Excitement was high in Brentwood Friday morning as the community celebrated the opening of a new Costco. The warehouse and 32 ...