That heat is then transferred to the old stone walls underneath. From there, the stone slowly radiates the warmth into the interior, keeping it around 70°F even as night temperatures drop to 25°F. A wood-burning stove compensates for cloudy days. (For the thermally-savvy, the polycarbonate has a U value of 1.1 W/m²K).

The house has a small environmental footprint. SHED built it using advanced framing, a technique that cuts down on the use of lumber by 30 percent. Another benefit of the method is that it prevents heat from escaping the home, making it more energy-efficient. Additionally, the architects installed a high-efficiency boiler that preheats water with rooftop solar panels; a heat recovery ventilation system that efficiently controls the climate; and a rainwater retention tank that conserves water.

Jimena makes use of a giant chalkboard just outside.

Smartphone Control You may not realize it, but you probably already own a useful home automation tool: your smartphone. All you have to do is download one of the many home automation apps, and use it to link together your various technologies. Photo via Vivint.

In the lane behind the garage, Finlay makes use of the occasionally neglected territory.

During the 2004 renovation the Wilsons replaced the plywood siding with cedar, and used reclaimed brick to maintain the home’s classic appearance.

The Lai family—Mayuko, baby Shota on her lap, David, Maya, and Yumi sitting on a cushion on the deck—relaxes in their indoor-outdoor living space, made by opening the glass sliding doors to connect the living room and engawa deck.

The most sustainable element of all is the Lais’ intention to make their first home their last home as well. “Some people have this mentality of getting a starter house, then upgrading from there,” David says. “We just wanted to find a place to live in and then stay there forever.” Eventually they imagine passing the home down to their children.

Corrugated siding usually used for roofing is used for the exterior.

In Seattle’s Greenwood neighborhood, architect Tiffany Bowie built an efficient house for her father, Dave, a retired engineer. A prototype system by Kirio monitors the home’s energy use. Shou sugi ban cladding in a herringbone pattern provides a striking backdrop.

The Wink Relay, seen here, shows the same control and monitoring interface visible on Pendl's smartphone. Here it's showing the interface related to activating/deactivating lights, though (depnding on what smart home devices you have) it can also open/close locks, control AC units, and more.

Whistle Activity Monitor by Whistle Labs, $100 at shop.whistle.com This sleek device tracks your canine's health and well-being just like a human wearable. Attaching it to their collar enables you to monitor their exercise and meals via smartphone.

Here's what you need to know before undergoing a building project with a contractor but no architect.

When not in use during winter, the tub is hidden from the home’s view. The entrance has a sheltered overhang for car parking.

The Whole Home Energy Boost Box.

The bag designers use templates to make their cuts.

The rest of the building is insulated with recycled cotton—4.75 inches in the walls, almost 8 inches in the roof—to keep the interior temperature stabilized.

Each home includes a solar photovoltaic panel array adequate to offset the home’s annual energy use.

Architect Burton Baldridge donated his services to Casis Elementary—his daughter’s large public school in Austin, Texas—to design and build an outdoor classroom that would augment an organic gardening program.

“I love the house more each day,” says Tamami Sylvester of her and husband Michael's home by Sebastian Mariscal in Venice, California. The kitchen, which includes all Miele appliances, is sheathed in custom woodwork from Semihandmade. Accessories from A+R complement the Caesarstone countertops and Franke faucet. A LifeSource Water System provides filtration. Photo by Coral von Zumwalt.

Six-inch-square blue tiles cover the walls and floor of the girls’ upstairs bathroom. The towels and rug are also by H&M Home.

After renting in San Francisco for a decade, DIY couple Molly Fiffer and Jeff Waldman bought 10 acres in the Santa Cruz Mountains, where the pair and their friends built a cabin compound complete with sheds, tree decks, a pavilion, a wood-fired hot tub, an outhouse, and an outdoor shower. The cabin is made from locally sourced, rough-sawn redwood, which the couple stained with nontoxic Eco Wood Treatment to give the panels an aged appearance and a dark patina.

"How would a kid draw a house?" architect Per Franson asked himself when designing the Olivero-Reinius family home. The simple prefab structure’s unusual color comes from a traditional source: falu rödfärg, the historic mineral paint that gives the region’s famous barns their red color.

Architect Gustavo Costa calls the home library the “project’s heart.” This central space houses the owner’s expansive collection of about 5,000 books, and acts as a meeting place for friends and colleagues. A Gerrit Thomas Rietveld Red and Blue chair completes the space.

5. "What are the top 10 most important things I must have in a home?" "If there are two people buying the home, write your answers down separately, starting with your absolute must-haves," Hoffman explains. “Putting together a list separately can give both parties and the realtor a clear picture of what the perfect home will have for both of you."

An outdoor shower was the family’s first construction project. “Doing the shower made us realize we can build things the way we want to build them,” says Meg.

“We sought to create a house that would not damage the environment and not be too visible,” says architect Tina Gregorič. A single zigzagging roof stretches over 5,380 square feet, doubling the area of the interior spaces and serving as an ideal spot for sunset cocktails and whale-watching.

If you’re traveling to Puglia in Italy, one of the most iconic sights are trulli (trullo is the singular), an ancient hut that's specific to the Itria Valley in the Apulia region of Southern Italy. Made with dry stone, trulli date back to medieval times.

He worked around existing oak and eucalyptus trees for the new building, and retained the vernacular of an original barn, at right, where Frankel hosts concerts. Check out MVRDV's Balancing Barn.

The courtyard is just one of many open spaces that will be highly utilized—in the non-winter months anyway. Concrete worked well with developing the language of FlatPak. The second level is a wood panel that can be clad in corrugated metal or cedar—different layers that can be plugged in like covers on your cellphone.

The kitchen is situated in a sunken basement, underneath the staircase’s walnuts steps. The same joiner who built the house’s timber elements built the white cabinetry which are finished in a 40% gloss lacquer. Silestone countertops and integrated appliances maintain the space’s simple lines. Additional storage is fitted under the staircase.

Located on a steep site with limited suitable building ground, the firm decided to cantilever the home over the hillside, which has the effect of helping the structure blend in with the landscape.

Architects Alice Fung and Michael Blatt designed their own home in Los Angeles, complete with a modern fireplace design clad in galvanized steel.

At night, the exterior screen provides privacy when the house is illuminated.