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Environmental Sanctuary Featuring Biogenic Limestone and Carbon Reinforced Concrete

Author:
Simon Kringas
Environmental Sanctuary Featuring Biogenic Limestone and Carbon Reinforced Concrete

Project in-detail

Characterized by its central atrium and use of biogenic limestone alongside carbon reinforced concrete, the design creates a functional living space that harmonizes light, air, and environment while prioritizing sustainable living.
5 key facts about this project
01
Central atrium promotes natural ventilation and light throughout the residence.
02
Carbon reinforced concrete ensures durability while maintaining aesthetic appeal.
03
Biogenic limestone integrates local materials for enhanced sustainability.
04
Innovative shading devices optimize energy efficiency in varying climates.
05
Double-height living areas enhance spatial perception and community interaction.

## Project Overview

Located in a dynamic urban-suburban interface, the Sahn House is a three-story residential structure that reinterprets traditional living spaces to enhance both community interaction and individual privacy. The design strategically organizes its areas to foster a balance between shared and private environments. Central to the concept is the integration of a vertical layout that promotes connectivity among inhabitants while maximizing the use of natural light.

### Spatial Strategy and Circulation

The Sahn House features a central atrium that serves as the heart of the design, allowing light to permeate the structure and facilitating passive ventilation for thermal comfort. This atrium not only enhances the aesthetic appeal but also improves the overall functionality of the home. The circulation system, which includes elegantly designed stairways and an elevator, ensures ease of access throughout the three levels, accommodating diverse mobility needs and prioritizing user experience. The organization of different functions across the levels is methodically planned: the ground floor accommodates public areas, including garage services and a lobby; the second level includes communal spaces for living and dining; while the top floor is dedicated to private quarters.

### Material and Environmental Considerations

The selection of materials reflects a focus on sustainability and aesthetic coherence. The use of carbon reinforced concrete, blockwork, and biogenic Aegean limestone cement not only supports structural integrity but also enhances thermal stability and visual appeal. These materials collectively contribute to an environmentally sensitive design, while features such as evaporative cooling systems and rooftop gardens create microclimates that connect occupants with nature. The integration of double-height spaces enriches the interior experience, promoting airflow and natural light, particularly in common areas.

Overall, the Sahn House is characterized by a meticulous approach to materiality and spatial organization, aiming to provide a harmonious living environment that responds to both the needs of its residents and its surrounding context.

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MICROHOME 10: Celebrating Small-Scale Living with €100,000 Prize Fund and Kingspan’s Innovation

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Competition organisers

The MICROHOME 10 competition invites participants to submit visionary designs for off-grid, modular microhomes that push the limits of sustainable, small-scale living. Organised by Buildner in partnership with Kingspan and Hapi Homes, this tenth edition sets the challenge of designing a dwelling for two people within a maximum floor area of 25 m², encouraging bold solutions adaptable to any urban or rural location. The competition continues Buildner’s mission to foster innovative approaches to compact, energy-efficient housing that can address pressing global challenges.

This year’s edition offers a generous total prize fund of €100,000, including the Kingspan Award for designs that integrate high-performance Kingspan products and the Hapi Homes Award for a project selected for real-world construction. In addition to cash prizes, the winners gain international exposure through Buildner’s media partnerships, publications, and a dedicated MICROHOME magazine, further amplifying their ideas to the wider architectural community.

Key dates for MICROHOME 10 include the closing date for registration on 25 September 2025, the submission deadline on 29 October 2025 (11:59 p.m. London time), and the announcement of winners on 9 December 2025. These milestones ensure participants have clear timelines to develop and present their concepts, with early registration discounts available to support students and emerging designers worldwide.

MICROHOME

Design a new small-scale home concept in the 10th edition of MICROHOME — 100,000 € prize + construction

100,000 € Prize Fund / Kingpsan Edition #10 ideas COMPETITION
Prize 100,000 € + Potential realisation
Eligibility Open to all
Final registration deadline 25 September 2025

Enter an open architecture
competition now

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Buildner's Unbuilt Award 2025
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