THE BRONX

The concept has been used in New York City since the 1980s, but shared savings agreements have only recently begun gaining traction with co-op boards and condominium associations as a way to finance green projects. It involves finance companies, energy consultants or contractor / vendors financing your green project with the promise they'll be repaid annually, with interest, through the subsequent energy savings. So when and why would such an arrangement be appropriate for your own building?

You want to do a lighting retrofit in your garage or convert your boiler from oil to gas. Where do you get the money? If your building is the right size, you may want to try a shared-savings agreement.

"For us, it was a no-brainer," says Herbert Freedman, the managing agent of Riverbay Corporation, which runs the 15,000-unit Co-op City complex in The Bronx.

Recent news affecting co-op and condo buyers, sellers, boards and residents. The aftermath of superstorm Sandy lingers, Concourse Village workers may strike and a co-op / condo board-member group meets with mayoral candidate Joe Lhota. Plus, lot o' news for boards this week, as one court ruling partly limits the Business Judgment Rule and another says a particular type of Airbnb rental isn't illegal hoteling. And experts answer a board member's own plea: "What Can I Do About the Tyrants on My Co-op Board?"

Today Habitat introduces "Teachable Moments," an occasional feature in which leading management professionals offer quick takes on various topics of interest to co-op and condo board members. In the first of this series, four industry veterans give mini-lessons on how to find creative solutions to problems that resist the usual approaches.

Recent news affecting co-op / condo buyers, sellers, boards and residents. This week, union workers say they're getting a Bronx cheer, Christine Quinn gets a nod in Queens, and a City Council candidate gets endorsed by a board in Brooklyn. Plus, a condominium board near the U.N. sues a law firm, and if you've ever wondered if you can legally photograph or shoot video of fellow residents breaking rules, find out now.

Recent news affecting co-op / condo buyers, sellers, boards and residents. This week, a wonderful new affordable co-op in The Bronx (at left) finds loud, trashy neighbors drinking on the street and throwing dangerous objects from several stories above — and the police don't care. Bet they would if this were 15 Central Park West, another co-op in the news. Plus, why is a Queens condo paying to keep up land the Department of Transportation is supposed to maintain? And for boards, we've the latest on the Dakota's discrimination lawsuit and on two East Village co-ops' no-restaurant policy.

Recent news affecting co-op / condo buyers, sellers, boards and residents. A co-op board is rightly skeptical of a claim that no possible antidepression treatment even exists other than a dog. A starchitect's building in Brooklyn comes without a trash room, and the city says it's legal — but still tickets the condo for, well, not having a trash room. Manhattan condos are selling strong, but co-op bargains are to be had in the Heights. And for co-op / condo boards, a discrimination lawsuit still stands, but its lawyers don't.

Recent news affecting co-op / condo buyers, sellers, boards and residents. This week, a co-op gets rid of a Citi Bike station — and we learn a co-op board elsewhere has banned shareholders from having bikes. A Bronx co-op owner tells a board horror story — and a board member asks how to get rid of a bullying board president. But on the positive side, Co-op City gets energy-efficient lighting — and Madonna's cut the price of her Harperley Hall co-op; now it's just $19.995 million!

Recent news affecting co-op / condo buyers, sellers, boards and residents. This week, Airbnb brings financial support to the case of Nigel Warren, fined $2,400 for illegal hoteling. Read the company's justification for why landlords, co-ops and condos should allows streams of strangers to turn residential buildings into hotels. The best part? Airbnb writes this on the company's "public policy" blog — never once mentioning that overturning New York's illegal-hoteling restrictions would give its business explosive growth. Yep, they're just looking out for the little guy, that's all.

Plus, is a co-op board backing bullies in Park Slope? Sure seems that way from the photographs of a Yuppie's obscene hand gestures toward an 88-year-old woman, her 53-year-old daughter and the grandkids at 808 8th Avenue in Brooklyn. Plus, Judge Judy sells her co-op, and the condominium board of a landmarked building sues to keep a Denny's restaurant out of it.

Recent news affecting co-op / condo buyers, sellers, boards and residents. Lots of news for boards in particular this week, as one co-op board sues the developer of One57 — the condo with the crane — and other boards face lawsuits against them because of superstorm Sandy. And it's board member vs. board member at The Bronx's Brady Court. Plus, a third of all homebuyers don't know what an "annual percentage rate" is. And while we'd bet that Ben Stiller (at left) does, he and his actress wife Christine Taylor still lost a million selling their co-op duplex on the Upper West Side.