Architecture studio Loadingdock5 has a few passive house projects in the city, the first of which was the single-family house at 174 Grand Street in Williamsburg, completed in 2011. It has a design shop on the first floor and a neon pink front door.

The townhouse at 23 Park Place holds the distinction of being the first certified passive house in New York (evidently, it is supremely difficult to actually get the certification, and a lot of places just use the standards without getting certified). The townhouse dates to 1899, and any passive house doubters only need to check out this thermal image to see how well the insulation really works.

Last November, plans were revealed for a four-story, seven-unit condo building on Freeman Street in Greenpoint. This building is also deigned by Loadingdock5, and it looks strikingly similar to 174 Grand.

Prospect Heights is getting a batch of futuristically named condos on Pacific Street. Called R-951, the small building will hold just three apartments, and it is aiming to be net zero, allowing owners to live without external power sources. It will have rooftop sun panels, rainwater harvesting system, and extreme insulation measures, as passive houses do. All units are about 1,500 square feet and priced between $1.49 million and $1.57 million.

Nava Companies is developing a 10-unit passive condo building designed by SBLM Architects that will be outfitted with a solar hot water system and a car-charging station. They hit the market in February, and three of the condos are already in contract. Prices range from $2.475M to $5.25M.

It's been called the ugliest house in Queens, but architect Thomas Paino's blue-white-and-gray-tiled Long Island City row house is comfortable in its skin—and eco-friendly, too. Paino insulated and sealed the building to meet passive house standards, and installed a solar-powered water heater and a planted roof. As for the facade, it is apparently "meant to evoke a cloudy sky," but we're not buying it.

Last year, the country's first multi-family passive apartment building opened in Bushwick. The 24 affordable apartments went to senior citizens. Architect Chris Benedict designed the building, which is topped by a giant solar array.

Knickerbocker Commons will be the city's second multi-family passive building, and like the first, it will be affordable housing. Architect Chris Benedict, the same person who designed the first multi-family building, is also designing this one. It will have 24 apartments available for disabled and low-income people.

Passive house guru Chris Benedict is also designing Manhattan's fist passive apartment building, but at 40 units, it will be larger than Benedict's projects in Brooklyn. The developer Synapse Capital bought the property in 2013, and they broke ground last month.

On Sackett Street, there's a seven-unit passive condo building developed by Michael Sohne. It was competed last year, and two two-bedroom apartments are currently still on the market.

During Open House New York in 2014, Russell Unger and Claire Hansen opened up their under-construction townhouse in Prospect Heights to shed light on the passive house building method. The pair retrofitted the house with the help of sustainable architecture firm thread collective, incorporating reclaimed wood, a solar array, and low-flow fixtures.

The four-story townhouse at 96 St. Marks Avenue is serious about its passive house status, and it has a website to prove it. Called Haus96, it was developed by Brendan Aguayo of Aguayo and Huebner and designed by Ken Levenson. The four apartments are outfitted their own dedicated ventilation systems, with high-efficiency heat recovery and the open kitchens have shaker-style cabinets. Living rooms holds a custom fireplace mantles made from joists reclaimed in the building. Completed in 2012, the house's claims to be the first "multi-family Passive House in the United States."

For years, art institution ABC No Rio has been planning to makeover its Rivington Street headquarters, and work is finally supposed to start in 2015. Renderings were revealed in 2012, and the tenement will be renovated to passive house and LEED standards.

Kurt Roeloffs told the Times that he renovated his townhouse to passive standards, and it didn't even increase the cost of the project. The temperature, amazingly, is a constant 72 degrees, and "the air just smells fresh and sweet, even after we cook, because the filters get rid of it so quickly."Michael Ingui, of Baxt Ingui Architects, who worked on the house, said in an email that it is also LEED Platinum cerified.

In Brooklyn Heights, a historic house on Garden Place was retrofitted for passive house standards, and the super insulation even blocks the cold around double-height windows. The owners bought the house in 2013.

The Bluestone Organization is building Queens' first multi-family passive building in Rockaway, and it will be larger than both those in Brooklyn and Manhattan—combine. It will have 101 apartments over eight stories, and a groundbreaking is set for this summer. The building is part of Arverne East and will be 100 percent affordable.

A passive house project in Carroll Gardens by Baxt Ingui Architects that's targeting net-zero energy use. "We are also tracking what seems to make the biggest differences and how they work once the clients move in," says Michael Ingui.

An under-construction passive house project in Carroll Gardens by Baxt Ingui Architects that's targeting net-zero energy use.

And yet another under-construction Baxt Ingui Architects project targeting passive house certification.

Under designs created by Zakrzewski + Hyde Arhcitects, the five-story 465 Washington Street is being gut renovated to passive house standards and doubling in size with a five-story addition. When complete, it will hold seven condos.

In December, plans were filed by Zakrzewski + Hyde Architects to build a five-story, seven-unit passive building in Crown Heights. The developer, Justin Stewart, is also responsible for 23 Park Place.