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Portland Concrete Chimney in a Compact Living Space

Author:
Arianna Tavazzi
Portland Concrete Chimney in a Compact Living Space
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A Portland concrete chimney integrates with a spiral staircase in a compact living space designed for efficient urban dwelling, maximizing comfort and functionality in a limited footprint.
5 key facts about this project
01
Unique sinuous design of the kitchen countertop enhances spatial flow.
02
Spiral staircase doubles as structural support for the heating chimney.
03
L-shaped couch integrated with a multi-use foldable table for flexibility.
04
Strategically placed windows capture natural light and outside views.
05
Vertical storage solutions maximize efficiency in limited space.

MICROHOME 2019 is a residential design that focuses on solving the issues of living in a small space. Set in an urban environment, it aims to combine comfort and practicality. The design emphasizes the need for areas that serve multiple purposes, allowing inhabitants to maximize their experience in limited square footage.

Spatial Organization

The layout features two levels where the ground floor is primarily for living activities. When entering, there is a kitchen equipped with a refrigerator, dishwasher, electrical burners, and a microwave. The kitchen countertop follows a smooth, curving design that adds to the welcoming feel of the space, making it more inviting for day-to-day use.



Multi-Functional Elements

At the heart of the ground floor is an L-shaped couch, positioned near a small foldable table. This setup allows the table to be used for different purposes, such as meals or work. Electric sockets are conveniently placed nearby, fitting the needs of modern life. Smart storage solutions are also present, including spaces for clothing, umbrellas, and shoes, ensuring that the home stays organized and efficient.



Vertical Connectivity

A spiral staircase leads to the first floor, measuring one meter in diameter. This staircase not only allows movement between levels but also supports the chimney. Built from Portland concrete, the chimney acts as the main heating source for the home, showing a focus on functionality and warmth.



Upper Floor Features

The second level introduces a foldable bed, designed to save space when not in use. Additional storage can be found beneath the bed, as well as shelves mounted on higher walls, making use of vertical space. The design includes strategically placed windows on the east and west sides, allowing natural light to fill the rooms and providing views of the outside.



A notable detail is the combination of the chimney base and the staircase, which not only supports the structure but also contributes to the overall design. This thoughtful integration reflects a commitment to both form and function in a compact setting.

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The Next House: USA — A Global Call to Reimagine the American Suburb

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Competition organisers

Buildner is launching The Next House: USA, a global architecture competition that challenges architects, designers, and thinkers to reimagine the American suburban home for the 21st century. For decades, the suburban house has symbolized comfort and stability, but today it often reflects excess, isolation, and environmental strain. This competition asks: how can the American home evolve to address climate urgency, economic pressures, and shifting social values?

Participants are tasked with designing a prototype home of no more than 1,500 sq ft (≈140 m²) for a household of two adults and one child. The design should be compact yet generous, adaptable, sustainable, affordable, and replicable across diverse U.S. contexts. More than a design exercise, the competition aims to spark a conversation about how homes can support healthier, smarter, and more connected communities.

The total prize fund is $20,000 USD. The final registration deadline is May 20, 2026, and winners will be announced on September 22, 2026. The Next House: USA invites architects, students, and visionaries worldwide to redefine what the American home means today—and what it should mean tomorrow.

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Design the next suburban home for the USA

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Early bird registration deadline 19 November 2025

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