Bulfinch Boston Realty, in business for 25 years, takes its name from the venerable early-American architect Charles Bulfinch. The company is deeply connected to the city, working with about 10,000 landlords in the Back Bay, Beacon Hill and South End neighborhoods. Agents deal in both sales and rentals, commercial as well as residential. Many of Bulfinch's apartments, depending on the season, do not require a broker's fee from the new resident.