As part of an ambitious plan to build new housing, New York City Mayor Bill de Blasio is proposing that the city create more affordable housing units by making inclusionary zoning mandatory because the cost of affordable units under the current voluntary system makes them a hard sell, even with density bonuses as incentives. "Mayor Bill de Blasio wants to create more affordable units by making inclusionary zoning mandatory: In areas rezoned to allow more density, developers would have to set aside inclusionary units, whether they used the additional density permitted by the zoning or not. By imposing this mandate, the mayor hopes to get both bigger buildings and more affordable units within those buildings."
Acknowledging that mandatory inclusionary zoning has proven both unpopular and, possibly, less than effective, Barro considers an alternative measure: "Nathan Newman, the housing activist behind the group More NYC, offers another suggestion: straight up cash. In a recent report, he argued that the city should drop inclusionary zoning and instead offer developers additional density in exchange for cash payments that the city could use to finance affordable housing programs."
The problem with that plan is that pesky scarcity of available land, which also makes the cash for affordable housing deal less than ideal: "if new dollars to subsidize affordable housing end up chasing fixed quantities of land and apartments, that could just drive up rents for middle-income New Yorkers."
In summation, "the city should impose this costly mandate only if it also increases possible development and decreases the cost of building."