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.

Omer Arbel, the creative director at industrial design firm Bocci, was given three parameters when he began designing a home for his colleague Randy Bishop: Create a “profound” connection between the internal and external spaces; build only one level; and, most crucially, utilize a wealth of 100-year-old beams salvaged from a series of warehouses owned by Bishop’s ancestors.

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 chromatic Paris apartment of Jean-Christophe Aumas holds a treasure trove of rare vintage furniture, displays from his work, and items curated from his travels. As the artistic director of the creative agency Voici-Voilà, he designs store windows and special events for clients like Louis Vuitton, John Galliano, Lacoste, Céline, and more; and so it’s no wonder that his own 1,023-square-foot apartment is teeming with character. The entire flat is self-designed in a fusion of his professional and personal flavors. Over herringbone wood floors, walls with painted shapes frame hanging artworks; colored cubes, created for a Sol LeWitt–themed Louis Vuitton display, pepper the space; and foraged furnishings ranging from flea market finds to designer pieces outfit the home.

The quiet, minimalist kitchen features a wall in the same “criptoméria" wood used for the bookshelf in the living room. A Davide Groppi Punto 2 PL light hangs over the dining table.

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.

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.

When the Ferguson Sauder family—parents Meg, a school counselor, and Tim, a design instructor, plus kids Cole, Olive, and Asher—wanted a multifunctional backyard addition, they decided to build it themselves. Two Liftoff chairs by Tim Miller, one of Tim’s former students, surround an oil-drum fire pit set in granite dug up on the property. On the deck, the Panamericana chair is by Industry of All Nations.

Architect Kevin Alter integrated wood from the original bungalow into the kitchen and covered the island in Carrara marble, with an interior clad in wood. A long table extends from the side of the island, and wine storage is integrated into one end of the island. New appliances include a Wolf range, a Broan hood, and a Miele oven and refrigerator. The Fucsia pendant lights are by Achille Castiglioni for Flos.

Prefab house in Muskö, Sweden

Multi-discipli­nary Swedish firm Claesson Koivisto Rune created the plans for this home for design-minded kit-house manu­fact­urer Arkitektus. Considering the unique balance of the facade, as well as its climate-specific construction—the asymmetrical "lifted" roof allows for both water drainage and maximum light during the dark winter months—Claesson Koivisto Rune’s approach to the project is some­what surprising. "We design buildings from the inside out," explains principal Eero Koivisto. "The exterior is more or less a product of the interior plans."

The roof deck, anchored by a gas fire pit from Paloform, boasts an incredible view of the water.

When building such a modest structure in a large landscape, designer and client often had to defend their vision to their collaborators. “We knew this house was going to be for Maggie and she would live there alone,” designer Lauren Moffitt says. “But people are always projecting for future resale. Putting in the smallest size of anything—to any subcontractor, it’s just not reasonable.”

+Farm is based in upstate New York, where land can be cheap but new housing prohibitively expensive: when a resident breaks ground on a waterfront site, their taxes can dramatically increase. What if new housing didn't need to technically break ground? "Our thought," says +Farm Director William Haskas, was "let's discuss ideas for a new type of dwelling....one that could potential help the people that actually live in the area."

Gaffney's cousin lives in the house just in front. To give a bit of perspective, this photo was likely taken just feet in front of the waist-high wall that runs between the two houses's yards.

A familiar scene in the Benoit home: Peter paints at the Steelcase desk—"I do all my work here," he says—while Ando sits nearby, waiting for attention.

The building retains its original footprint; this was an important detail for the homeowners who wanted to be as environmentally-friendly as possible. “The biggest element I work with is to use the existing structure when I remodel,” says Juilland.

Gray Organschi took down a worn-out 1970s summer home and reinvented it as a serene pair of bleached cedar volumes connected by a glass bridge.

OneButton recently outfitted a modern home on Long Island with smart lighting systems. "The design theory for the space is an artistic minimalism that provides warmth and invites the beauty of the natural space indoors," states the firm.

Linden specified a black stain from Cabot for the house’s exterior. The shade draws on Scandinavian and Japanese building traditions and helps the structure blend into the landscape. Native grasses populate the courtyard.

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.

In the naturally lit central living space, stained plywood is used for the walls and flooring. The interior boasts high ceilings, a wood-burning fireplace, and a dining table by Robert Ewert Designs.

The wood-and-metal exterior is all about the interplay of angles and planes. White Kynar-coated cladding tops rough-sawn pine planks stained a rich brown shade.

The historically protected property that Christine and James Boyle purchased on Long Island came with two existing shingled structures designed by modernist architect Andrew Geller in 1963. Bates Masi recast what was originally the primary residence as a guest cottage.

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.

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.

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.

The outbuilding serves as a studio, a guest house, and a playroom. A Murphy bed sourced from Craigslist was customized with a birch surround to give it a built-in appearance.

A found Eero Saarinen Executive chair was restored with help from a local auto body shop.

O’Sullivan designed the ceiling “to have a knitted or woven quality like that of wool or silk.” It dives down over the kitchen and dining area, eventually reaching a point at the entry that is low enough to touch. Here, resident Jes Wood leans against the onyx kitchen island while her daughter Ruby hangs out. Replica Jean Prouvé chairs surround the dining table; a vase by Bruce and Estelle Martin for Kamaka Pottery sits on top. The Reel table under the television is by Atelier Oï for B&B Italia.

Jean-Christophe Aumas’ multihued Paris apartment houses both the highly sought artistic director and the stunning assemblage of furniture he’s brought back from his travels. Aumas designed the kitchen island, which is covered in marble tiles from Carrelages du Marais—the geometric floor tiles are from the same place—and strung the matrix of lights up above it. The barstools by Charlotte Perriand were discovered in a vintage store in Antwerp, Belgium. The green wall is covered in paint from Emery & Cie.

Kitchen cabinets in Japanese elm are topped with Calacatta marble and wraparound concrete for the island.

Jonathan Adler and Simon Doonan collaborated with New Haven, Connecticut, firm Gray Organschi on their midcentury-inspired New York vacation home.

A good dose of inspiration from Luis Barragán turned a dark and beleaguered midcentury house into a family home for the ages. The paint colors chosen by the residents and architect Linda Taalman are American Cheese and Blushing Bride, both by Benjamin Moore, creating a tapestry of color and texture.

In keeping with the island’s rugged character, the new home was pared down to the essentials. Even the floor in the living room, elevated during the construction process to give seated guests sight lines of the coast, helped frame the outdoors. With this philosophy in mind, Vieira da Silva sourced and designed simple, light furniture, such as the custom bookshelves made from “criptoméria," a type of Japanese wood planted in the Azores for construction. The floor lamp, a Sampei model by Davide Groppi, is set above a Lamino Easy Chair by Swedese. Both the sofa and table are also Swedese.

The house was designed as a long, linear structure to accommodate the residents’ request that visitors always feel connected to the site as a whole.