Soft gray concrete, a polycarbonate screen, and metal roof bedeck the simple front facade of House A. Not immediately apparent? An underground water collection tank and solar panels. "We used a really high recycled content mix for our tilt-up concrete walls, which have 65-percent slag [a byproduct of steel production] instead of high-carbon emitting Portland cement," say the architects. Photo 6 of 8 in Domestic beauty by Anthony Robert from A Carbon-Neutral Concrete House Is an Exemplary Infill in Western Australia

Domestic beauty

6 of 8

Soft gray concrete, a polycarbonate screen, and metal roof bedeck the simple front facade of House A. Not immediately apparent? An underground water collection tank and solar panels. "We used a really high recycled content mix for our tilt-up concrete walls, which have 65-percent slag [a byproduct of steel production] instead of high-carbon emitting Portland cement," say the architects.