Accessory dwelling units (ADUs) have become increasingly popular in recent years, and with that popularity comes a growing number of companies specializing in their construction.

From modern, minimalist designs to unique, quirky structures, these companies are creating some of the most unique  ADUs. Here is a look at ten companies behind the construction of the most unique ADUs.

Casas inHAUS – Based in Spain, Casas inHAUS specializes in creating unique, modern designs.

Their ADUs are typically built with sustainable materials and feature clean lines and a minimalist aesthetic.

Backcountry Hut Company – The Backcountry Hut Company, based in Canada, creates modular, customizable ADUs that can be installed in remote locations.

Their designs are simple yet elegant, with an emphasis on functionality and sustainability.

Zunshine Living Houseboats – Based in Denmark, Floating Homes specializes in creating self-sufficient, floating ADUs.

These houseboats are sleek and modern, with an emphasis on sustainable features like solar panels and water filtration systems.

Baumraum – This German company specializes in creating treehouse-inspired ADUs.

With designs that are quirky and whimsical, with an emphasis on creating a connection with nature, they are some of most fun ADUs.

Vipp – Based in Denmark, Vipp creates sleek, modern ADUs with an emphasis on high-quality materials and craftsmanship.

The Vipp Shelter is inspired by Scandinavian design, with clean lines and minimalist aesthetics.

Modern Shed – Based in the United States, Modern Shed creates customizable, prefabricated ADUs that can be installed in a variety of locations.

Simple yet elegant, with an emphasis on creating a comfortable and functional living space, is the beauty of these homes.

Aloft Housing – Builds high-quality, affordable modular housing units that are designed to be energy-efficient and sustainable.

The company’s units are built in a factory setting, which allows for a high level of quality control and consistency.

Wee House Company – Based in Scotland, the Wee House Company creates small, customizable ADUs that can be installed in a variety of locations.

The designs are often inspired by traditional Scottish architecture, with an emphasis on sustainability and affordability.

Ecocapsule – This Slovakian company creates self-sufficient, mobile ADUs that can be installed in remote locations.

With futuristic and minimalist designs and an emphasis on sustainable features like solar panels and rainwater collection systems, these ADUs are wild.

Green Magic Homes – Based in Mexico, Green Magic Homes creates modular, customizable ADUs that can be installed underground.

Their designs are often inspired by hobbit homes, with an emphasis on creating a connection with nature.

These companies are at the forefront of the Unique ADU construction industry, creating some of the most unique ADUs.