It might be a bit chilly and more than a bit rainy outside, but that won’t keep us from daydreaming about seaside getaways. Helping things along on this dreary afternoon? This energy-efficient waterfront home on the Chesapeake Bay, which puts a sleek, modern spin on the traditional beach house. Architecture firm Meditch Murphey used autoclaved concrete to construct the home, a lightweight material that allows for mold and heat resistance, absorbs sound, and protects against water damage. The place was built with an eco-friendly design, incorporating geothermal heating and cross-ventilation cooling, solar-power roofing, and a planted green roof that’s meant to help with on-site storm drainage. All that—and it’s a pretty cool-looking, too. Click though the slideshow to take a virtual tour of this modern design.