Mayor Wu Proposes Zoning Rollbacks to Aid Boston Housing Production

Mayor Michelle Wu is proposing to roll back specific aspects of her administration’s 2024 inclusionary zoning updates to help lower development costs in Boston.

The proposal seeks to ease certain financial pressures on builders while maintaining the current 20% requirement for affordable unit set-asides. The city expects that temporarily adjusting the threshold for when these rules apply—moving it from seven units to 10 units—will result in the production of 100 additional units per year.

Industry leaders argue the plan misses the most critical economic lever. Chris Lehman, director of the Small Property Owners Association, told the Boston Herald that the changes do not address the primary cost drivers for major projects. The current 20% affordability mandate, which rose from 13% in October 2024, remains the central point of contention for developers struggling with stalled projects.

The mechanics of the zoning compromise

Wu’s plan focuses on liquidity and small-scale exemptions rather than a reduction in the total number of affordable units required. Under the new proposal, developers could pay their 50% inclusionary zoning buyout in seven annual installments instead of two lump-sum payments. The administration also plans to temporarily exempt certain small developments from the requirement for a two-year period.

These moves aim to revert parts of the policy to the standards used during the administration of former Mayor Marty Walsh. While the city frames this as a balanced strategy to remove barriers while ensuring residents can afford to stay, critics suggest the scale of the relief is insufficient to resolve the current housing backlog.

According to the Boston Herald, roughly 30,000 housing units have been approved in recent years but have failed to break ground due to financial constraints. Lehman said that while the move is “directionally a move in the right direction,” the threshold change is unlikely to impact large-scale construction.

“I think it would be much more useful to reduce the inclusionary zoning percentage itself from the current 20% down to 13%, which was what the previous administration had, or plausibly lower, which would move the needle on a lot more of the large construction projects that have been stalled recently,” Lehman told the Boston Herald.

The debate follows a tense public forum on Oct. 16, where the city’s chief of planning, Kairos Shen, defended the high standards of the current policy. Shen’s comments during that forum suggested that the administration viewed strict affordability requirements as a necessary component of the city’s development standards.

“It’s hard to develop here. It should be,” Shen said at the forum. “We’re developing good stuff, you know? You guys want us to lower our standards. Part of my job is to hold those standards and try to still make them work.”

Boston maintains affordability requirements while Cambridge considers reductions

The decision to maintain the 20% requirement places Boston in a different position than its neighbors. Nearby Cambridge is currently considering a reduction of its own affordability requirement from 20% to 10% to stimulate more active housing production.

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The tension between maintaining social equity goals and fostering economic growth is visible in the following comparison of the proposed policy shifts:

Policy Metric	Current (2024 Update)	Wu’s Proposed Change
Affordability Percentage	20%	20% (No change)
Estimated Annual Unit Gain	—	100 Units

Lehman suggested the decision to hold the line at 20% may be driven by political constraints rather than economic data. He suggested the administration may lack the “political space” to lower the actual percentage despite the pressure from the development community.

“The change that’s being proposed doesn’t actually do anything to change the economics of the major residential development projects that are going to move the needle the most,” Lehman told the Boston Herald.

The mayor’s office maintains that this approach is a vital part of a broader strategy to ensure Boston remains a city where residents can thrive while still building the necessary supply of homes.