Haines House by Christopher Polly in Newtown, Australia

Suzanne and Brooks Kelley at the back of their 1,100-square-foot guest cottage.

The owners toured this home, which surrounds a mature tipu tipu tree, while visiting relatives for the day. The brick is original to the 1947 construction.

Located 31 miles north of Lima, the C3 House is set in a windswept Ancón landscape that the architects describe as "martian-like."

“A building can have far greater impact than the space it stands in.”—William Carpenter, architect and resident

Sliding doors by Quantum were made to look like the original panes that couldn't be saved, and they lead to a fire pit outside.

New zoning allowed for a zero-lot-line structure, but required a public storefront, which Carpenter uses as an art gallery.

By knocking down walls, Dominguez was able to open the previously cramped kitchen and add extra cabinetry and counter space. He was also able to make room for a peninsula with a waterfall edge.

The kitchen’s original galley layout was retained, and the walls and utilities were kept in place.

See Arch restored the exterior fireplace wall and painted it a deep blue hue to match the repainted blue timber cladding.

This Beverly Hills kitHAUS is comprised of modernist prefab modules that can accommodate a variety of uses: from yoga studios to home offices, and from weekend retreats to pop-up kiosks and guest rooms.

Wedge by Wheelhaus

The living room and dining area occupy the heart of the "living" volume and are enclosed on both sides by full-height glazing.

In the living room, an 18th century jajim, purchased in Istanbul, hangs behind a Molteni & C sofa covered in woven linen with mohair pillows. The wool rug is from California Carpets.

100 Contemporary Green Buildings, Volume 1 is available through Taschen

100% Bollocks by The Wooden Truth, approximately 17 x 12 inches, $38

100 Quotes By Charles Eames, $25

While a two-story structure did not meet the zoning code, Richard Neutra bypassed that via his design of a "gloriette," an outdoor room flanked by aluminum louvers. Those panels shelter the home against the harsh desert elements and were recreated as part of the five-year restoration of Richard Neutra's original design. Photo: Tim Street-Porter

The bath’s Kohler Purist fixtures and Frederick Weinberg animal figures sit on a Corian countertop

The Airstream Haus’s interior is minimalist, but comfortable, boasting a fully functional kitchen and queen-size bed that doubles as a couch.

The Kelleys furnished the cottage with help from Suzanne’s daughter Betsy Burbank of Betsy Burbank Interiors. Classic modernist icons, such as a Saarinen Womb chair for Knoll, a Herman Miller Eames lounge chair, and an Eileen Grey E1027 side table look at home alongside present-day pieces such as an Encore sofa (which handily folds down into a sleeping surface) from Room & Board and a Doka rug designed and produced by Stephanie Odegard. The Wohlert pendant lights from Louis Poulsen were designed by Vilhelm Wohlert in 1959, but grouped as such, they appear distinctly contemporary.

Kai and Téa brush their teeth in the upstairs bathroom shared by all. “We went with the 1950s thing—a family bathroom,” explains Blatt. The sinks are by Kohler.

The Airstream Haus, parked in Ojai, California. August says that when your dwelling is small, it’s important to make the most of outdoor space.

While the original home was dark, like other homes of its period, the addition allowed Andrews and his team to let in an abundance of natural light.

“I really believe buildings are part of a city as an organism.”—William Carpenter, architect and resident

Interior designer Cathie Hong transformed the kitchen of this San Jose Eichler into a bright open space, but kept the wood paneling in the adjacent room, to preserve the warm, midcentury feel.

The façade of the interwar dwelling was painted bright white and left largely unchanged, with a sole burst of color coming from a yellow DesignByThem “tomtom” letterbox. Though the extension is invisible from the street, architect Christopher Polly says it provides “significant additional freedom for the owners and their three young children to grow into.”