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.

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.

"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.

A small country road borders the property to the west.

The large, naturally lit kitchen is the heart of the house. Messmate-clad cupboards and huge expanses of glass dominate the space where Angelucci uses the sink, Gorman works at the kitchen island, and Pepa and Hazel look on. Play in the courtyard between the kitchen and garage is easily supervised and enclosed from the alley behind the house.

A Simple Plan A Marmol Radziner–designed prefab house, trucked onto a remote Northern California site, takes the pain out of the construction process.

Architect Andrew Simpson and the owners wanted to keep the design simple and grounded with “a sense of modest honesty.” In terms of the exterior, “as much of the existing cedar cladding as possible was retained and reused.”

The home, clad in natural Australian timber, enjoys a sense of lightness thanks to slender columns that let it float over the dunes. The driveway and entry, at the rear of the building, have an understated design to build to the interior's magnificent ocean views. Firm director Phil Snowdon explains, “By creating an architectural form that draws your eye and leads you up the steep driveway, we could engage new visitors in a welcoming process that first reveals the object and then slowly reveals the main event, being the view."

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.

Franson Wreland also designed the court-yard and a pair of 160-square-foot outbuildings—one is used as guest quarters and the other as storage space. While residents Julia and Fatima Olivero-Reinius chat outdoors, Chippie the dog approaches an Asplund desk and a chair by LucidiPevere.

Outside, Kartell Masters chairs surround a Tom Dixon Screw table.

Rachel Nolan and Steven Farrell’s weekend house is located a couple of blocks from the beach on Australia’s Mornington Peninsula. Built with passive principles in mind, the low-slung structure features double-thick brick walls for thermal massing.

Michael Benjamin Lerner of the band Telekinesis collaborated with local prefab builder NODE to build a 392-square-foot DADU in Lerner’s Seattle backyard. The builder took care of design, permitting, site prep, and the foundation and framing. Michael tackled the finish work.

Harper sits on the porch just off the entrance. James notes that the children spend their time “swimming in the dam, feeding the chickens, and riding their ponies or bikes. It’s really just the simple stuff that we had when we grew up in the late ’70s and ’80s."

Rachel Nolan and Steven Farrell’s weekend house is located a couple of blocks from the beach on Australia’s Mornington Peninsula. Built with passive principles in mind, the low-slung structure features double-thick brick walls for thermal massing. The vertical wood cladding is unfinished spotted gum, a local timber.

Inspired by the sea and sand, Richard and Jackie Willcocks chose blue and orange joinery colors for their 1,140-square-foot prefab. The modular home is by New South Wales company ArchiBlox.

The house comprises a series of modules, with the main living areas occupying the center and the master bedroom on the right. A large deck juts off the living room.

A Hunter Pacific fan cools the master bedroom, which has a custom hardwood bed.

With little to no permitting required because of its small size, Sett Studio units can be used for an extra bedroom, a yoga studio, a hydroponics growing area or an office space, like this 96-square-foot one shown here.

Clad in Western red cedar siding and punctuated with floor-to-ceiling windows, this minimalist two-bedroom home boasts sunrise views over the Sonoma hills.

Koto’s charred-timber workspace is an exercise in wabi-sabi design that embraces imperfection amid the natural world. The carbon-neutral structure is built from natural materials, and it can operate both on- and off-grid.

Heating for the unit is provided by a Spartherm fireplace, with electric heating integrated into the magnesite floor. Walls are insulated with fire-tested wool felt under plywood panels.

Apart from cabins, saunas, and outdoor showers, Iglucraft has also used their hallmark structure to make offices, bars, and detached bathrooms. If none of these quite fit your needs, Iglucraft invites inquiries about bespoke projects.

The L-shaped secondary building perches over a craggy escarpment. It offers the best vantage point for taking in the moss-planted roof, forest, and ocean.

It takes three to five days to install a Vipp Shelter onsite.

Burnt cedar, Japanese cypress plywood, and mortar create a trio of contrasting yet simple surface textures that breathe a relaxed vibe into the Muji Hut.

Emilio Fuscaldo sits in the garden outside the brick house that he designed for himself and his partner, Anna Krien, on a small subdivided lot in Coburg, a suburb north of Melbourne, Australia. Photo by Nic Granleese.

Architect Jesse Garlick’s rural Washington vacation home references its rugged surroundings. The steel cladding has developed a patina similar to the ochre-red color of bedrock found in the area.

The Minimod by MAPA of Montevideo, Uruguay, is a primitive refuge with a modern twist.

NOEM, a Barcelona–based architecture firm, created a metal-clad house for a young client just outside Madrid. It’s raised 12 feet off the ground to offer better views of the landscape, lending it "the futuristic feeling that it just landed," says Pol Guiu, one of NOEM’s cofounders.

Upstairs, each daughter’s bedroom was designed as a sanctuary, with cozy touches like Simon Key Bertman quilts and cushions. The bed and Pile bedside table by Jessica Signell Knutsson sit on top of a Carpet Honeycomb by designer Maria Löw.

At over 500 square feet, the house’s green roof may be its most powerful—and most expensive—environmental statement. It cost $8,000 to waterproof, and $7,000 to landscape. Water from the roof feeds the toilet and the garden’s watering system, and the garden itself insulates the house and keeps gas bills low in winter. Photo by Nic Granleese.

Simpatico Homes founder Seth Krubiner has lived in the prefab company’s nearly net-zero prototype since it was customized and lifted onsite in 2011.

A narrow building next to the main structure houses storage and an outdoor kitchen.

The exterior is wrapped in cement fiber boards with a Cembrit patina finish. Due to a lack of onshore infrastructure, a big challenge of the project was the addition of self-contained sewage and clear water tanks.

In the dining area, Splügen Bräu pendant lamps for Flos hang over a Super-Elliptical table by Piet Hein and Bruno Mathsson for Fritz Hansen.