On November 15, 2021, the New York City Council approved a bill banning gas hookups in new buildings, making the biggest city in the U.S. the latest in a string of municipalities to prohibit natural gas infrastructure in new homes and buildings. In the two-and-a-half years since Berkeley, California, passed its then-novel municipal ban on new natural gas infrastructure, numerous cities have found themselves at odds with state governments and industry groups on the issue of full electrification in residential and commercial real estate. The resulting disputes, litigation and regulatory uncertainty have created headaches for the real estate industry. Although not all view the restrictions as negative, and many developers have embraced the push for more climate-neutral buildings, these bans introduce complexity to the real estate market, raising additional legal and commercial challenges.