Hong Kong studio James Law Cybertecture has developed a prototype for low-cost, stackable micro homes in concrete pipes, which could slot into gaps between city buildings.
Called OPod Tube Housing, the project sees 2.5-metre-wide concrete water pipes transformed into 9.29-square-metre homes, with doors that can be unlocked using smartphones.

Studio founder James Law envisions these tubular structures being piled up on top of one another, creating affordable starter homes for young people in vacant city-centre locations across Hong Kong.
He told Dezeen he thinks residents could live happily in the tubes for one to two years. He believes they would appeal to "young people who can't afford private housing".

"OPod Tube Housing is an experimental, low-cost, micro-living housing unit to ease Hong Kong's affordable housing problems," he said. OPod prototype shows how a tubular flat would look
The OPod project is currently still a concept, but the architect has built a prototype to show how a typical home could look. Inside the curved concrete walls, the home contains facilities for living, cooking and bathing.
A fully glazed front panel doubles as a door and window. Additional natural light is provide by lighting strips set under the shelves and a retractable lamp set into the wall.

The interior walls are whitewashed, lessening the industrial aesthetic, while a flat wooden floor has been installed to make it easier for the occupant to move around.
A bench...