New York City will limit how far sidewalk sheds can extend from buildings and increase enforcement against property owners who leave the structures in place indefinitely, Mayor Zohran Mamdani announced Friday.

The mayor unveiled the regulatory changes while standing outside Highbridge Gardens in the Bronx, a New York City Housing Authority complex where 4,100 linear feet of scaffolding had remained in place for more than five years, according to city officials.

Starting in August, sidewalk sheds will be capped at 40 feet from a building’s facade regardless of the structure’s height. Current regulations require sheds to extend at least half the height of the building under repair, which means tall towers can push scaffolding dozens of feet into surrounding open space.

“We are interrogating every single rule and regulation that we have to answer the question of ‘Is this necessary to keep New Yorkers safe?’ And if the answer is no, then it deserves to be changed,” Mamdani said during the announcement.

The new 40-foot cap will significantly reduce how much sidewalk and green space gets consumed, particularly on NYCHA campuses where buildings are tall and open grounds are shared by residents, according to the mayor.

Sidewalk sheds currently cover more than 380 miles of streets or 7,500 city blocks throughout the five boroughs, with some structures remaining in place for more than 15 years, city officials said. The prolonged installations result from “outdated regulations that make it easier to leave a building in disrepair than to fix the issues that are actually at hand,” Mamdani said.

The city plans to intensify enforcement against what officials call “perma-sheds.” A new Department of Buildings rule will allow the agency to penalize property owners for keeping sheds up too long and require public updates on shed status every 90 days.

The regulatory overhaul also includes changes to mandatory facade inspections for newer buildings. Well-maintained buildings under 40 years old will shift from mandatory facade inspections every five years to every 12 years, with abbreviated visual check-ins every three years in between.

Buildings Commissioner Ahmed Tigani said the inspection change stems from an 18-month analysis of tens of thousands of facade inspections conducted by the city.

New York City currently has nearly 8,000 active sidewalk sheds, representing a decrease of about 1,000 from five years ago, according to city data.

The scaffolding structures, officially known as sidewalk sheds, are erected to protect pedestrians from falling debris during building repairs and maintenance. However, they have become a persistent source of frustration for residents and business owners who complain the structures block sunlight, create dark corridors, and remain in place long after repairs are completed.

The new regulations represent part of the Mamdani administration’s broader effort to examine city rules that may no longer serve their intended purpose while maintaining public safety standards.

Property owners will need to comply with the new 40-foot extension limit when the rule takes effect in August. The enhanced enforcement measures and revised inspection schedules will also begin implementation around the same time, according to city officials.

The changes come as the city continues to grapple with aging building infrastructure and the need to balance public safety with quality of life concerns in dense urban neighborhoods where sidewalk space is at a premium.