NEW YORK CITY

U.S. Sens. Chuck Schumer and Kristen Gillibrand have proposed new federal rules.

Funds will help a co-op and a condo pay for retrofits and avoid fines.

Support grows for campaign to expedite dismantling of ubiquitous sidewalk sheds.

Switching from fossil fuels will be "challenging but not impossible," says one expert.

Real-time energy management produces data that drives energy savings.

The Department of Buildings has failed to collect $627 million over the past six years.

Many co-ops and condo expect added costs in fight against rats.

Apartment buyers face a moral dilemma during grilling by the co-op board.

Mandatory program would begin in June, differs from voluntary organics recycling.

Mayor signs bill that will accelerate the city's ban on a prime air pollutant.