MassDevelopment has issued a $14.82 million, tax-exempt bond on behalf of Trinity Mattapan Heights Five Limited Partnership, which will use bond proceeds to help build a 60-unit affordable housing facility in Boston’s Mattapan neighborhood.

The Mattapan Heights project will have 16 one-bedroom units and 44 two-bedroom units, and be rented to households earning up to 60 percent of area median income. TD Bank purchased the bond, according to a statement.

Trinity Financial, the project’s sponsor, has developed and leased three other housing facilities on the same 52-acre campus, the former site of the Boston Specialty and Rehabilitation Hospital.

"We are excited to continue our collaboration with the Boston Public Health Commission and the Mattapan Community Advisory Board in redeveloping the historic Mattapan Heights Campus," Trinity project manager Eva Erlich said in a statement. "Partnerships with organizations such as MassDevelopment make these types of projects possible and we are grateful to have the opportunity to work with MassDevelopment in providing 60 new units of affordable housing in the Mattapan community."