
Studio by Fernando Abellanas —
This secret workspace hangs off a highway in Valencia, Spain.

Studio by Fernando Abellanas —
Despite not having legally purchased the right to build there, Abellanas says that the authorities haven't contacted him about his site.

Studio by Fernando Abellanas —
The project, he says, is a reflection of the lack of space in cities.

Homeless shelters by James Furzer —
These parasitic pods were designed for homeless individuals.

Homeless shelters by James Furzer —
Furzer says his designs are a response to "hostile architecture" in cities -- a controversial type of design intended to prohibit people from using public spaces in certain unsanctioned ways i.e. to sleep on a park bench.

LightHouse by All(Zone) —
Through its use of light materials, this structure provides an escape from the punishing heat of Bangkok.

LightHouse by All(Zone) —
The design is suitable for use in tropical metropolises, All(Zone) says.

Detached by Panos Dragonas & Varvara Christopoulou —
This hut designed by two Greek architects attaches to rooftops.

Detached by Panos Dragonas & Varvara Christopoulou —
Covering just 97 square feet (9 square meters), it is envisioned as an hideaway in the heart of Athens, as these renderings show.

3Box by Stephane Malka Architecture —
These glass, steel and wooden structures are designed to fill spaces between buildings in prime areas of Paris.

3Box by Stephane Malka Architecture —
They provide much-needed affordable inner-city housing in the French capital.

Manifest Destiny! by Mark Reigelman & Jenny Chapman —
Attached to a downtown San Francisco hotel, this structure is an imaginative use of urban space.

Manifest Destiny! by Mark Reigelman & Jenny Chapman —
Fitted in 2012, the structure looks like a bird house and comes with a solar-panelled roof.

Havre 77 by Francisco Pardo Architecto —
This structure in Mexico City is attached to a 19th-century home.

Havre 77 by Francisco Pardo Architecto —
The parasitic architecture project turned a deteriorating building into office space, two restaurants and a co-working facility.

Rucksack House by Stefan Eberstadt —
This extension can be attached to any home, and has been installed in Leipzig, Cologne and Bamberg in Germany.

Shoreditch Rooms by Archer Architects —
A three-story building is added to the roof of a derelict former London pub.

Excrescent Utopia by Milo Ayden De Luca —
Here's a really imaginative idea: attaching parasitic structures to lamp posts in London.

192 Shoreham Street by Project Orange —
This parasitic property in Sheffield, England, saw a Victorian-era industrial building transformed into a vibrant space. The extension houses a double-height restaurant and bar, plus office units.



