Toll Brothers is proposing building a more than 200-unit affordable housing project at 528 Boylston St. in Newton, under a Chapter 40B comprehensive permit application.

The developer’s proposal is under review by Mass Housing for the 244 rental units on the 5.82 acres of land previously owned by Sam White & Sons along Rte. 9.

Under Chapter 40B, which was enacted in 1969 to address shortfalls in affordable housing in Massachusetts, at least 20% to 25% of units in a development have to be affordable and the permit granting authority is the Zoning Board of Appeals, rather than a planning board, city council, selectmen or mayor. 

Toll Brothers’ proposal is to redevelop seven existing parcels at 528 Boylston St. into one on which will be built a six-story apartment building with 244 units, which will be a mix of one-, two- and three-bedroom apartments. 

Several amenities will also be available to residents, according to the project’s filings including a community lounge, fitness center, pub-style dining area, outdoor space, family play room, a courtyard with grilling areas and a sky lounge.