Fantini & Gorga, a mortgage banking firm headquartered in Boston, said Tuesday that it has acted as lead advisor on a financing package for the $36.4 million Boott Mills West project in Lowell.

The project calls for the renovation of a 19th century mill into 77 apartment units and nearly 43,000 square feet of office space. The project is a joint venture between Winn Development and Rees-Larkin Development.

The project used soft debt and three kinds of tax credits – federal, state, and New Market – as well as a $19.1 million leveraged loan tailored to the New Market structure, placed directly by Fantini & Gorga, the firm said.