Two new companies have opened their doors, one in Maryland, the other in Virginia. The Maryland firm, Pearl Properties, owned by Pearl R. Phillips, operates from offices at 10110 Sutherland Rd. in Silver Spring. Phillips, noting that the trend in brokerages has been to bigger and bigger companies, expects to go in the opposite direction, offering the kind of personalized service that is sometimes absent from larger firms. The Virginia company is Ken Murphy & Associates, formed by Ken Murphy, formerly vice president and director of the New Home/Condominium Division of Long & Foster. The firm has offices at 8027 Leesburg Pike in Vienna. It will specialize in sales of new homes and condominiums and provide consulting services to builders and devlopers who have their own sales staffs. . . Harbor Terrace Associates has been honored with a community beautification award presented by Alexandria Mayor Charles E. Beatley Jr. The award was for the redevelopment into modern condominiums of a group of 1942-vintage residences on Bashford Lane, just off the George Washington Memorial Parkway. Harbor Terrace Associates is a general partnership of Wilboy Investments, Inc. and L&P Investments, Inc . . . Long & Foster has acquired the Rockville real estate firm of Regent Realtors. Rick Campbell, Regent's owner, has joined Long & Foster's Rockville/White Flint office. Long & Foster is also expanding its Virginia operations following its acquisition of Realty World-New Town. David Robinson, owner of the Realty World franchise, and 17 sales associates will be joining Long & Foster . . . Contracts for future construction in the District climbed 64 percent in November compared to the same month the year before. Residential construction contracts jumped from $2.5 million in November, 1981, to $13.8 million this past November, according to the F. W. Dodge Division of McGraw-Hill. The value of all construction contracts rose from $39 million to $64 million.