New York CIty Council Member Ben Kallos

AM New York New rules proposed to curb abuse of 'mechanical voids' in high-rises by Sarina Trangle

New rules proposed to curb abuse of 'mechanical voids' in high-rises

City planners have not managed to avoid critiques with their new approach to mechanical voids.

The Department of City Planning suggested new protocols for spaces set aside in residences for electrical, heating and cooling systems after community groups claimed developers were stretching buildings past standard heights by including unusually tall floors for mechanical equipment.

Under the city's vision, these so-called mechanical voids would start to count toward large residential towers' total allowable square footage once they surpass 25-feet in height. Repeated mechanical spaces would be factored into the skyscrapers' permitted footprint if there is not at least 75 feet between the voids, under guidelines proposed in parts of the Upper West Side, Upper East Side, Queens and the Bronx.

The limits seemed lax to several elected officials and neighborhood groups in Manhattan, who claimed at a hearing Wednesday that the regimen would still allow the proliferation of places like 432 Park Ave., where mechanical voids account for about 25 percent of — and illuminate patches at night of — the 1,396-foot tall condo, according to City Councilman Ben Kallos. 


"We need to pass it immediately due to the sheer number of buildings that are coming down the pipeline that want to use voids to get additional height," Kallos said. "There is always room for improvement, and I am concerned it doesn't go far enough."

Trade groups representing engineers and developers, however, said the framework proposed was not flexible enough for the breadth of buildings it could regulate and raised concerns about it impeding energy efficiency and other construction advancements.

"By restraining innovation at a time when the means of achieving operational and energy efficiencies are rapidly evolving, the legislation could cost the city opportunities for future use of the most advanced and appropriate mechanical health and safety systems," said Paul Selver, a member of the Real Estate Board of New York trade group representing landlords and developers.

Kallos, reading testimony on behalf of 10 other Manhattan politicians, suggested mechanical spaces that stretch beyond 14-feet in height be calculated into buildings' permitted square footage; and grace spaces only be allowed every 200, rather than 75, feet.


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