This article discusses two tools to promote affordable housing in wealthier communities: regulations and lawsuits.

But Massachusetts has a work-around: A state statute, called 40B, allows developers to get around exclusionary zoning and build affordable housing in communities where only a small percentage of units are considered affordable. (A few other states have similar policies.) The statute, passed in 1969 and upheld by the state’s Supreme Judicial Court in 1973, has led to the construction of 1,300 developments throughout the state, containing a total of 34,000 units of affordable housing, according to Citizens’ Housing and Planning Association, or CHAPA.Projects built under 40B are almost always controversial: The statute was enacted in the first place because most communities outside of big cities didn’t permit multi-family housing, said Ann Verrilli, the director of research at CHAPA. Even with the statute, communities often spend millions of dollars in legal fees to try and stop the projects, Verrilli told me…

The experience of developers trying to build affordable housing in Massachusetts takes on added significance now, as housing advocates wait for a decision on a landmark case in front of the Supreme Court that concerns where low-income housing projects are placed. The case, Texas Department of Housing and Community Affairs v. The Inclusive Communities Project, arose when a nonprofit housing group sued Texas, arguing that the state primarily distributed tax credits for low-income housing projects in minority-dominated areas. Inclusive Communities argued that doing so perpetuated segregation and violated the Fair Housing Act, which was passed in 1968 to prevent landlords, municipalities, banks and other housing providers from discriminating on the basis of race. The Supreme Court case centers on whether this discrimination has to be intentional in order to be illegal, or whether the Fair Housing Act also seeks to prevent policies that may not be intentionally discriminatory, but that have a “disparate impact” on minorities…

Many affordable housing units in the suburbs are a direct result of court cases, and even enforcement of those programs are lax. In 2009, Westchester County in New York signed a desegregation agreement and agreed to build and market hundreds of apartments for moderate-income minorities after a court found it had misled HUD by applying for funds that it said it would use to integrate housing, and then did the opposite. Four years later, the county had not complied with the provisions.

The shift from discriminatory race-based housing policies to economic ones in the 1960s and 1970s was an important one. I suggest reading David Freund’s Colored Property: State Policy and White Racial Politics in Suburban America. This is the logic still used today: better off residents argue that they worked hard to get to their higher quality of life and that others should have to do the same. But, since race/ethnicity and social class are inextricably linked, keeping out the lower classes through big lots, expensive properties, a lack of apartments, and other methods leads perpetuates residential segregation.

Two other relevant points from this article. First, affordable housing in the suburbs can be done well through good design and not high levels of concentration. Second, given the resistance to such projects as well as design guidelines that are helpful, still nowhere near enough affordable housing has been constructed. In one sense, the foot draggers of wealthy communities are winning because they have slowed down a process started by the courts in the late 1960s (the Gautreaux case) and 1970s (the Mount Laurel case). Plus, the wealthy can move easily if their properties are threatened.