From left: Richard Grossman, Fred Peters, and Douglas Heddings

At Manhattan’s luxury buildings, doormen don’t just hold the doors — they hold the keys.

Which is why an impending strike, set to begin at midnight, could turn a lot of desirable listings into pumpkins, according to industry insiders. Without doormen, many apartments may be off limits.

So far, ongoing contract negotiations haven’t panned out between the local chapter of the Service Employees International Union, which represents around 30,000 building service workers, and the building owners’ Realty Advisory Board.

This has some in the industry nervous, according to Douglas Heddings, founder of Heddings Property Group, an affiliate of Charles Rutenberg Realty. Heddings said that the threat of a possible strike has emboldened many buyers to get in while they can.

“We have buyers now who are saying ‘I want to get in today,’ because they’re worried about having access tomorrow,” Heddings said. “Some buildings are prohibiting showings during the strike.” [more]

Matt Daimler, a technology wiz with little background in real estate, thinks he can solve some of the most vexing problems in New York City residential sales today.

His new site, Buyfolio.com, which launched Tuesday, allows buyers and brokers to communicate through a single Web page. After seeing listings on sites like Streeteasy.com and the NYTimes.com — or even brokerage sites like Corcoran.com and PrudentialElliman.com — users can save the listing to their personalized Buyfolio.com page and evaluate, compare, and organize them.

Both brokers and clients are welcome to launch pages — for free, for now — and no registration is required. When a listing changes in price or status, or it will be having an open house, the user is notified via e-mail, something Daimler said could eliminate the need to incessantly check listings on their home sites. Also, a broker can use the site to monitor his or her clients. Although the site is exclusively for residential sales in the five boroughs right now, Daimler said he’d be open to other listings, like commercial properties, in the future. [more]