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.

Architecture firm NADAAA planned a striated addition to a brick neo-Georgian house in Boston with the owners’ primary goal in mind: to engage with the outdoors year-round. The walls of the rear kitchen and living space are virtually all glass, allowing sight lines to the existing gardens and new pool house through a series of framed vignettes onto the backyard landscape. The glass box is bookended by uniform “fins” that mark the edge of each picture window, as shown here. Photo by John Horner.

Architect Gregory Phillips connected the original house to a new modern extension that doesn’t interfere with the surrounding houses. “I try to be true to the location,”he explains, “so it doesn’t seem like some spaceship has landed.”

This dreamy, glass bedroom by the lake was created as an early prototype for the prefabricated greenhouse/she kits known as the Kekkilä Green Sheds.

Helsinki architect Ville Hara and designer Linda Bergroth collaborated on a prefab shed-meets-sleeping cabin, which can be assembled with little else than a screwdriver. Bergroth, inspired by nomadic yurt dwellers, wanted an indoor/outdoor experience for her property in Finland.

Photo by Patrick Barta

A prefab pool- and guesthouse designed by LABhaus frames views of a Massachusetts property’s original structure, a Dillman model Sears, Roebuck kit house from 1928.

This 3,200-square-foot structure was assembled with a prefabricated foundation, concrete panel siding, and efficient built-ins, minimizing construction debris and toxins—such as concrete foundation tar—on the site.

From the street, only the main house and one adjoining addition are visible, belying the spacious extension at the back. The architects call this the “Tardis effect,” named for the time machine on Dr. Who that looks much smaller on the outside than it does within.

kitHAUS prides itself on its stylish, modern prefabs that are built on-site by a team of company employees. Their patented aluminum system takes only a few days to construct, and the homes boast superior energy efficiency, owing to insulated floors, walls, and ceilings as well as glazed doors and windows.

Summer of 1926, the roaring twenties and Art Deco style was well underway.

White was used extensively throughout the addition, a choice that the architects say enhances the spacious feel of the rooms and draws attention to the views.

The roughly 5,000-square-foot Lens House renovation, which was finished in 2012 and just won a 2014 RIBA National Award, required six years, major remedial work on the roof and walls, approval from the planning committee, and even a sign-off from a horticulturalist to guarantee the backyard excavation didn't interfere with a walnut tree. "These things aren’t for people who are in a hurry," says architect Alison Brooks. The focus is the ten-sided trapezoidal office addition. "It wraps itself around the house with a completely different set of rules than the Victorian building," she says.

Architect Oliver Lang and his partner, Cindy Wilson, created Monad, a multiunit prefab prototype in Vancouver.

When Abbie and Bill Burton hired Marmol Radziner to design their prefab weekend home, their two requests were “simple-simple, replaceable materials,” says Abbie—such as concrete floors (poured offsite in Marmol Radziner's factory) and metal panel siding—and “the ability to be indoors or outdoors with ease.” Deep overhangs provide shade and protection from rain, so the Burtons can leave their doors open year-round and hang out on their 70-foot-long deck even in inclement weather. They visit the house once a month, usually for a week at a time, with Vinnie and Stella, their rescue Bernese Mountain dogs. Their two adult children occasionally join them. The couple hopes to one day retire here.

All of Scott Palamar’s selections and customizations brought the total to $150,000 for the 640-square-foot home and surrounding land. “I feel like I struck on such a novel solution because I was able to afford a home tailored to my lifestyle,” he says.

The clients insisted that none of the trees on the property be disturbed, so Kevin Alter and his team at Alterstudio Architecture built a deck and an overhang around two of them.

Another view of the deck.

“The house is a piece of origami made out of triangular shapes, which we then draped over the landscape,” says Arbel.

Alterstudio Architecture of Austin designed this house in the Texas capital for a young family of four.

In consultation with the clients, Alterstudio opted to clad the house in local cypress rather than imported, FSC-certified ipe.

Designers used this drawing, made in the 1920s to reconstruct Gropius's office.

Modern bathroom vanities in white bathe the room in light, creating a relaxing atmosphere. Mirroring the kitchen of this home, the bathroom features custom wooden cabinetry and Brodware faucets.

Vintage wooden bowling game set from the 1920s, $199.

The master bath contains all functions in the white fiberglass panel that runs the length of the wall. Lazor designed the vanity; the tub is by Duravit.

1. Navajo Germantown Wool Rug, circa 1920s“We’re particularly enamored with Navajo weaving and textiles. We both grew up around them and they carry a great significance for both of us. This piece is very special. It’s made out of Germantown yarn that was introduced in the late 1800s. It was very expensive and only used by skilled weavers -- the Navajo really liked these bright colors, they couldn’t get them from traditional dyes. It’s interesting because this yarn is not traditional- it was introduced by settlers, but it really helped encourage and build a market for Navajo weavers.”

According to Remijnse, since the only direction they could build on the small site was up, they decided to add height with a gabled roof.

Sticker Shock Though colorful dashes here and there certainly enliven the sober interior, little adds a dose of whimsy like the wall decals found in the kids‘ rooms. The owl over Jonne‘s shoulder is available from Raumgerecht and the branch leaves are from the Dutch company Inke. raumgerecht.de, inke.nl

The wood shed portion artfully encapsulates all the domestic detritus that would be anathema within the all-glass sleeping portion.

Bruce Thatcher and Kirsty Leighton behind their London home.

Studio owner Joey Williams uses his space to work from home as an Austin-based media director.

Claire and Ken Stevens approached architect Ko Wibowo to create a modern addition to their 1970s home in Tacoma, Washington. The couple’s needs had changed since Ken was diagnosed with Alzheimer’s a few years ago.

The couple's house, designed by architect L. Jane Hastings in the early 1970s, is located on a steeply sloped site that backs up to a state park.

Bassam (left, with Fellows) hung redwood garage doors that match the house’s exterior.

In the serene upstairs bathroom, Kennon paired Chinese Bluestone floors from Defazio with white ceramic wall tiles from local supplier Classic Ceramics. The tub is by Bette with a Roger Seller faucet, while the bathroom sink is by Argent with a Grohe faucet.

The bungalow had beautiful bones but some major problems, including a poorly designed addition to the back that had to be removed. In its place, Tribe Studio designed a gray brick box that connects directly to the garden. “The owners love the fact that the extension is compatible with the old part of the house, and is completely different from many renovations of this type, which simply open up the back in a single move,” Tribe says.