It will take a little money to acquire the first zero-carbon home in California:
The roughly 14,400-square-foot modern ranch-style house has all electric appliances and mechanical systems, and comes with an organic vegetable garden, orchard and apiary, according to marketing materials. In addition, the develop said it reduced carbon emissions during construction by using alternative building materials.
“This home will have zero [carbon] emissions throughout its lifetime,” said Scott Morris of Crown Pointe Estates, developer of the home. The average U.S. home emits 8.3 metric tons of carbon dioxide a year, according to U.S. Environmental Protection Agency data…
Until recently, developers have focused on reducing energy use in homes, but attention is expanding to include cutting embodied carbon, the greenhouse gases that are emitted during the manufacturing, transportation and disposal of building materials, said Cliff Majersik, a senior adviser at the Institute for Market Transformation, a Washington, D.C., think tank with public and private funding that promotes investment in low-energy building. If the developers rigorously reduced and measured embodied carbon, and offset the remaining carbon, it would be a “very impressive achievement,” he said.
According to Mr. Morris, Crown Pointe reduced the embodied carbon in this home’s construction by replacing 80,000 pounds of steel in the original home design for sustainable timber. It says it slashed its concrete usage by 14% by replacing a concrete-slab foundation with a crawl-space foundation. And rather than place a concrete subfloor beneath the wood and stone floors, it used a rubber underlay made from recycled tires. Around 25% of the concrete used is recycled, the developer said.
This is a cool feat and yet it is not exactly anything close to an average home. The irony here is that this zero-carbon home both costs so much – it is a luxury in a premium location to be zero-carbon – and it is such a big house – a reduced environmental footprint yet still taking up a lot of land and having a quintessentially American square footage. Does this make being zero-carbon a status symbol?
How long until this kind of home is within reach of more homeowners? Some of this technology would be possible in much smaller homes but it could still be costly to eliminate carbon from all the other materials.