Fortunately for the unrelated roommates, that is, because in NYC the housing code prohibits more than three to live under the same roof. By one estimate, that would make at least 15,000 units illegal. This article looks at several of them.
NYC is not alone in occupancy codes that are designed to prevent crowding, a measurement of residents per rooms in a dwelling unit (as opposed to density, which is units per acre). However, these laws may be arcane in cities of exceedingly high housing costs that attract young people as well as immigrants of limited income.
"New York, home to some of the nation's highest rents and more than eight million people, many of them single, it is illegal for more than three unrelated people to live in an apartment or a house. The law, for decades part of the city's Housing Maintenance Code, is little known, widely broken and infrequently enforced.
The lax enforcement might not be a bad thing, since a sizable number of the city's denizens. According to the Census Bureau's 2008 American Community Survey, nearly 15,000 dwellings in the city housed three or more roommates who were unrelated to the head of the household. Experts say that number is almost certainly underreported.
Jerilyn Perine, a former city housing commissioner and the executive director of the nonprofit Citizens Housing and Planning Council, said occupancy laws should be determined not by whether people were related, but by whether a unit was safely inhabited, whether by four people or more."
FULL STORY: In New York, Breaking a Law on Roommates

Alabama: Trump Terminates Settlements for Black Communities Harmed By Raw Sewage
Trump deemed the landmark civil rights agreement “illegal DEI and environmental justice policy.”

Planetizen Federal Action Tracker
A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

The 120 Year Old Tiny Home Villages That Sheltered San Francisco’s Earthquake Refugees
More than a century ago, San Francisco mobilized to house thousands of residents displaced by the 1906 earthquake. Could their strategy offer a model for the present?

USDOT Repeals Emissions Monitoring Rule
A Biden-era regulation required states to report and plan to reduce transportation-related emissions.

CaBi Breaks Ridership Record — Again
Washington D.C.’s bike share system is extremely popular with both residents and visitors.

San Francisco Opens Park on Former Great Highway
The Sunset Dunes park’s grand opening attracted both fans and detractors.
Urban Design for Planners 1: Software Tools
This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.
Planning for Universal Design
Learn the tools for implementing Universal Design in planning regulations.
Clanton & Associates, Inc.
Jessamine County Fiscal Court
Institute for Housing and Urban Development Studies (IHS)
City of Grandview
Harvard GSD Executive Education
Toledo-Lucas County Plan Commissions
Salt Lake City
NYU Wagner Graduate School of Public Service