Chapter 40B is also known as the Comprehensive Permit Law, was enacted in 1969 to help address the state wide shortage of affordable housing by reducing barriers created by local zoning and other restrictions. The goal of 40B was to encourage the production of affordable housing in all communities throughout the Commonwealth.
Chapter 40B is a state statute which enables local Zoning Board of Appeals (ZBA) to approve affordable housing developments under flexible rules if at least 20-25% of the proposed units have long-term affordability restrictions. The affordable single family homes, apartments and condominiums are reserved for those who make less than 80% or less of the median household for the area.
In 2007, the Commonwealth issued additional guidelines regarding development under Chapter 40B. In 2007, additional guidelines were issued to provide specific procedures for conducting audits after the developments have been completed and for reviewing these audits when they are submitted to the state.