Synopsis: This 2600-sq.-ft. house in Margate, N.J., is similar in many respects to the average American home being built today, and the methods used to construct it are within the reach of most builders. However, its tight envelope, careful siting, water-conservation methods, finish materials, mechanicals, and low vulnerability to damage from storms and coastal flooding make it anything but average.

According to the National Centers for Environmental Information, 2015 was the warmest year since 1880, the year when global temperatures began to be recorded. But climate change is fickle, and during the winter of 2015, many in the northeastern United States were muttering the new cliche, “So much for global warming!” Instead of experiencing the warm winter much of the western United States was having, the northeastern states were bundling up against the polar vortex, the extremely cold pocket of air that typically hovers above the Arctic but occasionally reaches deeper into North America.

That winter, Margate, N.J., had its third-coldest February since 1895. Frigid temperatures caused Kirsten and Joe Levin’s heat pump to fail. “I don’t remember how long it was before we realized the heat wasn’t working,” says Kirsten, “but it took a while.” Once they figured out that the temperature in their new house had dropped a few degrees, Kirsten plugged in a pair of small electric space heaters that she had used to help heat the uninsulated cottage that formerly occupied the property. “We were fine,” she says. “It’s amazing how well the new house holds heat.”

It’s said that a certified Passive House can be heated with a couple of hair dryers, but Kirsten and Joe’s home is not a Passive House. It is certified by the New Jersey Climate Choice Home program, which means that it meets New Jersey Energy Star…