Century 21 Real Estate has added a new affiliate in the Baltimore area. Advance Realty Bel Air is now operating as Century 21 Advance Realty. Founded in 2005 by Terry Berkeridge, the brokerage was acquired in 2020 by Patrick Campbell, who originally joined the company in 2009. Campbell, a longtime sales professional, now leads the firm as owner and broker — overseeing residential real estate...