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.”

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.

The planks inside the house blend into those on the small porch just outside. It's a nice touch that helps marry the outdoors with the home's interior.

The studio addition is part of a revamp that unifies buildings, canopies, and the courtyard. It was a three-year job for architect-owners Matt Wittman and Jody Estes, with many materials opportunistically salvaged.

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.

Cedar slats help this Ontario lake house float soundly atop still waters. Photo by: Raimund Koch

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.

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.

The larger volume of the addition, consisting of kitchen, living, and dining spaces, loops around to the smaller bedroom through a wooden passage. The same ipe, with differing finishes, is used for both the interior and exterior. Expansive sliding glass doors by Fleetwood dramatically open up the living space to the outdoors.

The roof deck is a place for entertaining, and offers scenic hillside views. During the design process, the team was challenged with preserving these views while adhering to the required 3.5-foot railing height mandated by building code, a height that would block all views while seated. As a solution, the team came up with open metal railings that would maintain safety while preserving the view.

Michael O’Sullivan’s blown-glass pendant lights make another appearance in the living area, where a kauri-plywood wall showcases a piece by artist Martin Poppelwell. Photo by Emily Andrews.

Privacy and respect for the natural environment was foremost in the new owners’ mind when conceiving the home’s redesign. The placement of the addition limits direct sightlines to neighbors and offers unbroken views of the surrounding area. The aluminum frame and glass walls create a light, airy atmosphere.

“Before, the house turned its back on the landscape,” said Parish. “This renovation and addition really animates the garden.” Sliding glass doors match those of the living room beyond the deck, and both can be completely open to the yard.

By merging typical Saigon architectural and stylistic details, architect Toan Nghiem of a21 Studio created a space that brings family together. Stacking roof layers, open flowering balconies, and an alleyway that serves as a living room, dining room, and outdoor playground are all filled with colorful, rich materials. Inside Saigon House, reclaimed and second-hand furniture lend history and spirit to the home. With so many small interior rooms and divisions between spaces, the addition of a net ceiling brings openness to the back alleyway, where the family often gathers to eat dinner. Not only does the net allow for ventilation and light, but it offers a place to play for the children, who love to climb and lounge above their parents.

The glass balustrade and floor were sourced in Germany and installed by James Aiken. Angelique, the founder of Papillon Designs and Landscaping, clustered plantings around the exterior glass addition.

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 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.

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.

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

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 decidedly industrial exterior features smooth dark gray stucco, a custom steel mesh wall, and a metal spiral staircase leading from the ground floor to the roof deck. The clients love the industrial look because it feels raw and natural to them. The footprint of the new addition lies at the rear of the existing home, and the dark exterior helps seamlessly integrate the new structure into the natural slope of the land. According to architect John Klopf, the new addition acts as a spatial backdrop for the existing structure, “receding visually out of respect for the original home.”

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.

Inside the studio

The entire living and dining space features tough polished concrete floors. The architects intentionally contrasted the darker concrete and veneered pantry against the neutral white walls and marble. This color play runs through the renovated areas.

In the rear of the house, a new addition extends the living space and adds a roof terrace off the second-floor master bedroom. A garden is accessible through a wall of sliding glass doors with Sapele mahogany frames, set back to control solar gain.

A 1960s midcentury home in Austin was renovated by local practice Webber + Studio, with a second story added while preserving the home’s original character.

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.

To keep the project close to their $10,000 budget, the family looked for bargains whenever possible. The circular window was a misorder they snagged for 90 percent off from a local building supply store. The mahogany siding is a mix of Craigslist purchases and Dumpster finds.

The dramatic rear elevation showcases the open-plan living and dining room. Apart from the addition, the rest of the home maintained its “traditional” layout, with bedrooms branching off from a central hallway. Windows on all sides of the addition bring light in and make the space feel bright and expansive. Tonal and textural contrast can be seen between the burnt ash cladding at the exterior and the engineered European oak flooring at the interior. Through thoughtful design and space planning, the architects and owners made the biggest impact possible with only 500 square feet of added living space.

“It’s a great house for a young family—playful, practical and different,” Tribe says. “You can sit on the windowsill in the sun and feed the baby, kids can climb in and out, often through the windows, and you can see everything that is going on.”

The clients had an impressive collection of Scandinavian midcentury teak furniture that now pops beautifully against the concrete floors, white-painted brick, and pine v-joint walls.

For the the living room, the architects designed a cluster of picture windows that frame unique views—a jacaranda tree or a patch of sky—and block out neighbors from a nearby apartment building.