Northern Virginia's newest home builder is a Briton who is an American citizen. And he has an Irish name.

William B. Regan, president of Globe, U.S.A., Inc., was born 50 years ago in Detroit and lived there until he was six. Then his parents moved back to their native England.

Regan returned to American on the Concorde last year and took a look at the Northern Virginia countryside. He liked what he saw and set up a subsidiary of Globe Construction Co. Ltd., which has built several thousand houses on the fringes of London.

Now Regan has opened a sales office in Burke Centre and has started 11 four-bedroom houses, priced from $90,000, in the Georgian Mews subdivision. If his pillared, conventional two-storey houses find a market here, Regan said he hopes to begin a program to do about 200 Georgian-style houses and town houses annually in this area. Some smaller, less-expensive house will be built in clusters, he said.

Regan and his family have moved into a Norther Virginia home and he has been making regular flights across the Atlantic to keep current with his British projects. Regan has brought over Cyril Hart, his firm's technical director, to be project manager for the new home in Burke Centre.

Walter Brown of Page & Brown, an Alexandria architectural firm, has joined the Regan firm and is overseeing thee copying of details from the Georgian period in 18th century England, including ornate niches that Globe is importing from England. Regan said they are replicas of plaster niches that became a mark of residential elegance in the 18th century.

Regan's Burke Centre houses are being built by Scott, Long & Foster, a new general contracting organization headed by Bruce Scott, who also has his own Northern Virginia general contracting firm.

Newly building in the 1,300-ace residential planned community, are the Magna Group, which has started 81 contemporary town houses. The Christopher Companies, headed by Frederick Kober, has several contemporary single-family houses nearly completed. These are the first non-traditional houses to be built in the community that was started in 1976 near Burke Lake.