Information about the state's 40R and 40S and Housing Production Plans:
MA Chapter 40R
The Smart Growth Zoning Overlay District Act, Chapter 149 of the Acts of 2004, codified as M.G.L. chapter 40R (the Act), encourages communities to create dense residential or mixed-use smart growth zoning districts, including a high percentage of affordable housing units, to be located near transit stations, in areas of concentrated development such as existing city and town centers, and in other highly suitable locations.
MA Chapter 40S
Additional state funding (Chapter 40 S) will also be directed to cities and towns that establish a 40R district, to cover the costs of educating any school-age children who move into such districts.
Lexington Housing Production Plan (2014)