Boston-based Trinity Financial has started construction of Treadmark, a $45 million mixed-income residential complex near Dorchester’s Ashmont MBTA station.

The 83-unit project is billed as a model of how private developers can profitably build mixed-income housing in high-cost Boston with state and local subsidies.

The Architectural Team of Chelsea designed the 6-story complex. Boston-based interior designer Taniya Nayak is providing design services for Treadmark, previously the site of Ashmont Tire. The tire shop has reopened at 1160 Dorchester Ave.

Nayak, who appears on the Food Network’s “Restaurant: Impossible,” has worked with several other local properties, including 88 Wharf in Milton and Back Bay Harry’s in Boston.

Treadmark received more than $3 million in state and federal tax credits that generated approximately $22 million in equity for the project. The project also received $3 million in rental subsidies and $4 million from the city of Boston.

“Our goal is to accelerate Ashmont’s revitalization while maintaining a strong connection to the community whose involvement was so vitally important to getting this project underway,” Mathieu Zahler, senior project manager for Trinity Financial, said in a statement.

In June 2015, Trinity Financial acquired the two parcels spanning 0.6 acres at 1961-1987 Dorchester Ave. and 4 Fuller St. for $3 million, four months after obtaining final approvals from the Boston Redevelopment Authority.

The site is across the street from the 116-unit Carruth mixed-income complex developed by Trinity Financial in 2007 on an MBTA-owned parcel.

Editor’s Note: This article has been updated to reflect the correct number of income-restricted condos. The article previously stated there were four. We regret the error.