MANHATTAN

1120 Fifth Ave. transformed its lobby from a gas-guzzling space to one that is fully electrified, shaving 10% of its annual natural gas consumption.

Replacing electric baseboards with heat pumps is a win for shareholders and the planet.

Carnegie House co-op seeks protections if negotiations with land owners break down.

The co-op board must approve all transfers, and there are no guarantees.

Iconic building is part of a post-pandemic trend of office-to-residential conversions in New York City.

Maintenance costs likely to increase as boards deal with new lending landscape.

Two floods in his penthouse apartment inundated elevator shafts, hallways and other apartments.

Denial of support animals — parrots — plus retaliation bring co-op massive fine.

Co-ops and condos are taxed as though they were market-rate rental buildings.

Governing documents tell who's responsible for fixing building flaws.