Age: 30
Location: Washington, D.C.
2006 Revenue: $640,000
Employees: 10
Year founded: 2004

A Harvard MBA, Bo Menkiti sold his own home in the capital's Columbia Heights neighborhood to launch an urban real estate development, brokerage, and sales firm aimed at first-time buyers in the underserved middle market. In less than three years, his team has developed 33,000 square feet of residential and commercial property and brokered more than $60 million worth of real estate in the region. What's next for Menkiti? Developing a new 30-unit affordable housing building from the ground up.