Another expansion for West Seattle-headquartered Berkshire Hathaway HomeServices Northwest Real Estate (WSB sponsor): CEO Mike Gain will formally announce tomorrow that BHHSNW is expanding into Pierce County by acquiring Puyallup-based Prudential Contact Corporation, REALTORS. It’s a full-service brokerage founded in 1982. The acquisition means BHHSNW now has eight offices in the region, and is looking to expand further. Its West Seattle HQ is in the office building on the north side of Jefferson Square.