Below net-zero in lap of luxury

BOULDER — Clunky energy-efficient home builds of decades past have evaporated over the years as technological advances, improved building practices, increased interest and governmental regulations have morphed into today’s standards.

One property under construction in Boulder County blends the best modern technology has to offer, a vision for luxury living without a carbon footprint, and a lovely contemporary aesthetic into what could become the most energy-efficient home in Boulder County.

The 7,700-square-foot home when completed should produce more energy that it uses and earn a Home Energy Rating System score, or HERS score, of negative 29.

“That’s the lowest ever permitted in Boulder…