Ground was broken Tuesday on 41 units of mixed-income townhomes at Olmsted Green, part of a $200 million redevelopment of the former Boston State Hospital site.

The project is Boston’s first homeownership workforce housing project, and is funded by MassHousing’s Opportunity Fund, the Department of Neighborhood Development and the Neighborhood Housing Trust. The developer, Lena New Boston LLC, is a partnership of New Boston Fund and Lena Park Community Development Corp.

The master plan for the 42-acre site calls for a total of 514 mixed-income rental and home ownership units. Lena New Boston previously completed 210 affordable housing units and 19 home ownership townhouses at Olmstead Green.

The project’s construction is funded by a $8.3 million loan from a bank consortium of Eastern Bank and Boston Private Bank, $2.25 million from the city of Boston and $1 million from MassHousing’s Workforce Housing Opportunity Fund.

The project will reserve 11 units at $210,000 for first-time homebuyers making at or below 80 percent of area median income, and 11 units priced at $267,500 for first-time buyers making at or below 100 percent of AMI. The remaining 19 homes will be sold at market rate prices ranging from $320,000 to $360,000.

Building features include Energy Star-rated mechanical systems and appliances, triple-paned windows and continuous fresh air circulation. The two and three-bedroom units will include engineered wood flooring, open concept living, laundry machines and private patios.