Boston-based Trinity Financial has completed its acquisition of two parcels in Dorchester’s Peabody Square where an 81-unit mixed-income residential complex is expected to break ground in early 2016.

The six-story development at the Ashmont Tire property will include 39 condominiums and 42 apartments, said Kenan Bigby, vice president for Trinity Financial.

All of the rental units will be reserved for qualified affordable tenants, with a 50-50 split between those earning no more than 100 and 80 percent of the area median income. Four of the condos will be income-restricted. The project also includes 4,000 square feet of retail space.

Trinity paid $3 million to acquire the parcels at 1961-1987 Dorchester Ave. and 4 Fuller St. on June 26, according to Suffolk County Registry of Deeds records. The Boston Redevelopment Authority approved the project in February.

Trinity expects to close on financing by year’s end, Bigby said. The tire company will remain open until the start of construction.

The 0.6-acre site is across the street from the Carruth, a 42-unit mixed-income complex that Trinity Financial built in 2007 on land leased from the MBTA next to Ashmont station on the Red Line.