Long & Foster, the Washington DC area's largest residential real estate firm, leased 20,000 square feet of class-A office space at 1312 Bellona Ave. in Lutherville, MD. The 26,000-rentable-square-foot building, which also houses IRC Real Estate Services and Platt Development Group will now be 100 percent occupied when Long & Foster moves in at the end of the month. The building is near the corner of I-695 and Charles St. Bill Martien and Michael Spedden of IRC Real Estate represented Long & Foster and the landlord, PDG LLLP.