SAN MIGUEL REALTY Oldest San Miguel Real Estate Firm. 46 Years Experience & Knowledge. If you are Buying... LOLITA BARRERA Broker & Owner will find your Dream Home or Property in San Miguel de Allende, Guanajuato, Mexico. If you are Selling a Property... SAN MIGUEL REALTY is your Best Option. Thousands of Satisfied & Happy Client can not be wrong and has chosen us. You could be the next one.