The Eustis Fire House, Boston’s oldest, is getting $2.1 million in new markets tax credit financing for renovations from the Massachusetts Housing Investment Corp. (MHIC).

The Dudley Square firehouse was built in 1859 and has been out of service as a fire station since 1919 and vacant since the 1950s, according to a statement. The building has been held up by wooden braces to prevent the building’s collapse. Construction on the firehouse began in November 2010.

Historic Boston Inc. (HBI), a nonprofit that preserves and rehabilitates historic properties in Boston, will be in charge of the restoration project. Once construction on the building is complete, HBI will use it as the company’s headquarters.

"This project is very special," said Joe Flatley, president of MHIC. "It preserves an important part of Boston’s past; it complements the many other investments MHIC and other private and public investors have made in Dudley Square, and it will greatly add to the revitalization of this neighborhood."

The Eustis Fire House project is expected to create at least 15 construction jobs and cost $2.2 million. The expected completion date is May 31.