Macy Miller designed her 196-square-foot house in Boise, Idaho, to accommodate her growing family. "Boise has a minimum square footage for dwellings—600 square feet. If you put wheels under it, it kind of bypasses all the building codes," she says.
Designers participating in the +Farm Summer 2015 studio built this creative mobile home; its 8-by-5 foot dimensions contains a small room that sleeps two and easily converts to a hangout space. Deployable solar panels can generate 1,000 watts and help residents cook, brew coffee, and project films (via a compact digital projector).
A skylight over the lofted bed and some clever storage moves, including magnetized spice containers overhead help maximize space in Jay Austin's eight-foot-wide Matchbox house.
The POD INDAWO, designed by architect Clara da Cruz Almeida in Johannesburg with the interior designer team Dokter and Misses, tries to tackle South Africa's high barrier to homeownership with a roughly 186 square feet prefab concept.
Bruno Despierre of Brussels-based firm B-ILD transformed a 140-square-foot Dutch military structure into a modern-day vacation retreat. To accommodate four people in the compact space, he deftly devised a fleet of built-in multipurpose furniture pieces, all made from meranti-finished plywood.
The NOA Cabin concept by Estonian designer Jaanus Orgusaar is a 270-square-foot design that gives the impression of a rounded interior due to a lack of acute angles. Orgusaar built the structure a few years ago, in a clearing near a pine and fir forest in the Virumaa region of Estonia, as a summer home for his family.
Architect and metalworker Christi Azevedo successfully transformed a 93-square-foot brick boiler room, built in 1916, into a cozy guesthouse.