GREENWICH VILLAGE

Around 2 o'clock one dead-of-winter January morning, the telephone rang on Asher Bernstein's bedside table. The co-op board presidents of the 100-unit Butterfield House in Greenwich Village picked up the receiver and found himself listening to the agitated voice of his building's superintendent.

Bill Bissell said, "Asher, there's a flood! You better go take a look at 13th Street — it looks like the Hoover Dam opened up!"

Every successful cooperative or condominium needs an Ideas Guy, the one who says: "We need this, we want this, and let me tell you why." At the 325-unit Brevoort East at 20 East 9th Street in Greenwich Village, 31-year co-op board veteran Jay Silverzweig is it. His own mantra for what makes a project succeed consists of three words: "conception and execution." Recent cogeneration and Local Law 11 initiatives are among the many works he has overseen since moving here in 1982. In fact, he describes infrastructure projects and financial affairs as "my little niche in the building."

Recent news affecting co-op / condo buyers, sellers, boards and residents. This week, a 63-year-old woman in a Fifth Avenue co-op has had the same Maytag washer in her apartment for 20 years with permission and without trouble. Now the co-op board won't approve a replacement unless it's one of three hoity-toity brands. Well, lah-de-dah ... Maytag's not good enough for 'em? Let's go to court! And court may be where Trump Village West board president Igor Oberman might wind up, since a New York City Department of Investigation report accuses him of less-than-ethical things. Plus, Co-op City has an asbestos problem. Or does it?

In 1950, a young Jay Silverzweig, the owner of a plastics business, watched electricity costs take a toll on his neighbors in Greenpoint, Brooklyn. Two fellow entrepreneurs, who used steam to clean rags, finally decided to get off the electric grid and worked out a cogeneration system (or CHP, i.e., "combined heat and power") that uses natural gas to produce electrical and thermal power.

More than 60 years later, those early experiments in alternative energy were lurking somewhere in Silverzweig's mind as he spearheaded the $1.5 million cogen project at the Brevoort East, a 26-story, 325-unit cooperative at 20 East 9th Street in Greenwich Village.

As the second storm of the week hit New York City and its environs, some managers say calcium chloride, or sidewalk salt, is in short supply. "We are running out," said Pamela DeLorme, president of Delkap Management, based in Howard Beach, Queens. "We bought a few thousand bags before the season began, but with the frequent storms, the substance is now in short supply." Delkap obtained about 2,000 bags of salt two weeks ago.

Under Local Law 84 of 2009, large buildings must record and keep track of their energy and water use — and then the city posts the results for all to see. The letter grades are linked to a numerical score called the Energy Use Intensity (EUI), which measures the energy used by a building per square foot, per year. The median EUI for multifamily buildings in New York City is 132.1. Score a 109 or lower and you earn an A; higher than 160 is a D. But in practical terms, how well do these grades translate to real-life energy use?

Recent news affecting co-op / condo buyers, sellers, boards and residents. This week, condo-owners at the landmarked American Tract Society Building a.k.a. 150 Nassau Street, swill be welcoming a Denny's restaurant, after all. Well, maybe "welcoming" is too strong a word. In Brighton Beach, the ultra-green condo at 67 Brighton 1st Lane may or may not still be called Bright N' Green, but it's back in the news. Upcoming Late Night host Seth Meyers buys in Greenwich Village. And condo owners at The Lennox say its construction was bollocksed. Plus: Tips on spotting a friendly / liberal co-op board.

Recent news affecting co-op / condo buyers, sellers, boards and residents. This week, half of Albany is up in arms and the other half is sticking its hand out over 421a tax abatements for luxury condominiums. Meanwhile, the attorney general slaps the wrist of a developer banned from selling any condos at all. Plus, a big change at Co-op City and a big sale in Greenwich Village, as Mary-Louise Parker (right) sells her Washington Square co-op. Plus: Advice for your co-op board admissions interview.

Recent news affecting co-op / condo buyers, sellers, boards and residents. As the year ends, some things don't change. To wit: Two Financial District condo boards and Pace University have filed a lawsuit to keep a city Probation Department center out of the neighborhood; co-op shareholders at Dunham House on the Upper East Side are fighting a retailer who threatens to block their views; and a condo board in Flushing, Queens, is getting sued for its treatment of a Buddhist church. Man, who hates Buddhists? Plus, one of the New York Giants is renting out his condo apartment during Super Bowl week since, let's face it, the Giants have no reason to stick around.

Recent news affecting co-op / condo buyers, sellers, boards and residents.

This week, a co-op shareholder in Queens complains about a neighbor's noise and gets heard in court, and a condo board in Chelsea sues a commercial gym over weighty noise issues. A newspaper says almost half the buildings that object to Cite Bikes don't get them, but you can't wait till you know they're coming. Bike 22. What's the latest luxury amenity? On Park and Fifth Avenues, it's private restaurants just for residents and guests. Plus, Leonardo DiCaprio buys a "wellness" apartment in Greenwich Village. Yeah, we didn't know what that was, either. Sounds nice, though.