Not every home needs to be horizontal.

A handful of daring designers have broken the mold to build up instead of out.

In this list, we take a look at how the tower concept is applied to housing design.

Tower House

The first three floors of the vacation house only include a small bedroom and a small private bath.

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2.

Willliams designed and built the Skysphere himself.

Tower House by Gluck Plus - Photo by Paul Warchol - 3

He also automated the structure with an Android operating system.

Lighting, climate control, music and entertainment, and even the locks can be controlled via Android.

Each upper level of the tower house has its own deck.

Tower House by Gluck Plus - Photo by Paul Warchol - 1

The tower also features glazed wall enclosures and a narrow steel staircase.

The water reservoir at the top is not being used but is accessible.

The penthouse features glass walls, a deck and interior furnishings that reflect the era.

Tower House by Gluck Plus - Photo by Paul Warchol - 2

The penthouse was part of an AirBnb promotion in March.

The roof is complemented with a frameless curved glass skirt below it to provide the inhabitants with scenic views.

One staircase leads from the main living area to lounge and bedroom areas on the two levels directly above.

Tower House by Gluck Plus - Photo by Paul Warchol - 3

The other staircase leads to the topmost three levels that contain the work spaces for the architecture firm.

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Water Tank House by Messana ORorke 2

Water Tank House by Messana ORorke 1

Water Tank House by Messana ORorke 3

Water Tank House by Messana ORorke 2

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Watertower of Living by Zecc Architecten 1

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Watertower of Living by Zecc Architecten 2

Watertower of Living by Zecc Architecten 1

Glen Lake Tower by Balance Associates 1

Glen Lake Tower by Balance Associates 2

Glen Lake Tower by Balance Associates 1

Glen Lake Tower by Balance Associates 3

Crepain Binst Architecture - Water Tower Brasschat 1

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Martello Tower Refurbishment by Piercy Company 1

Martello Tower Refurbishment by Piercy Company 3

Martello Tower Refurbishment by Piercy Company 1

Martello Tower Refurbishment by Piercy Company 2

Cien House by Mauricio Pezo and Sofía von Ellrichshausen 3

Cien House by Mauricio Pezo and Sofía von Ellrichshausen 3

Cien House by Mauricio Pezo and Sofía von Ellrichshausen 4

Cien House by Mauricio Pezo and Sofía von Ellrichshausen 1

Cien House by Mauricio Pezo and Sofía von Ellrichshausen 1

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Martello Tower Refurbishment by Piercy Company 2

Martello Tower Refurbishment by Piercy Company 3

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Crepain Binst Architecture - Water Tower Brasschat 3

Crepain Binst Architecture - Water Tower Brasschat 2

Glen Lake Tower by Balance Associates 3

Glen Lake Tower by Balance Associates 2

Watertower of Living by Zecc Architecten 2

Watertower of Living by Zecc Architecten 3

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Water Tank House by Messana ORorke 3

Water Tank House by Messana ORorke 1

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Tower House by Gluck Plus - Photo by Paul Warchol - 2

Tower House by Gluck Plus - Photo by Paul Warchol - 1