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Timber Microhomes with Rainwater Harvesting and Community Focus

Authors:
Farrell Jeremiah, Gabriella Sari, Andi Karindhiya
Timber Microhomes with Rainwater Harvesting and Community Focus

Project in-detail

Constructed from timber and designed for rainwater harvesting, these microhomes promote community living while maintaining a strong connection to the surrounding rainforest environment.
5 key facts about this project
01
Constructed with locally sourced cross-laminated timber for sustainability.
02
Designed to harvest rainwater effectively for daily use.
03
Includes organic waste digesters for compost generation.
04
Promotes communal interaction with shared outdoor spaces.
05
Utilizes a bent A-frame structure for improved energy efficiency.

The Huma Ikei project is located in East Kalimantan, Indonesia, surrounded by rich tropical rainforests. The initiative responds to the country's decision to move its capital from Jakarta, which faces significant climate challenges, to this less populated area. Designed with a focus on sustainability, Huma Ikei aims to create a living environment that connects well with nature and encourages community interaction. Each home functions as both a residence and a workspace, addressing the needs of modern living.

Architecture Concept

The design features a cuboid shape that reflects traditional architecture found in Kalimantan. This form not only respects local culture but also improves construction efficiency. The roof is angled to maximize sunlight for integrated solar panels, showing a clear commitment to renewable energy use. This practical approach ensures homes are not only functional but also environmentally friendly.

Building Layout

The layout of the residential units promotes outdoor communal spaces. These areas allow for social gatherings among residents while maintaining individual privacy. Openings throughout the structure are strategically placed to enhance natural airflow and light, reducing the reliance on artificial lighting and cooling systems. This design creates a comfortable atmosphere that supports energy efficiency and day-to-day living.

Resource Management

Huma Ikei focuses on self-sufficiency through resource management. A rainwater harvesting system captures approximately 1,817 liters of water daily, effectively taking advantage of the region's high rainfall. This sustainable method promotes responsible water use and strengthens the community’s resilience. Additionally, organic waste is processed in digesters to produce compost, enriching the soil for local food growth.

Materials and Sustainability

The project uses materials that align with the goal of sustainability, including a wood structure, timber cladding, recycled timber joists, and cross laminated timber (CLT). The inclusion of solar panels highlights the commitment to reducing environmental impact and energy costs.

The design encourages greenery around homes, allowing for easy access to nature. This arrangement not only enhances the aesthetic of the community but also supports biodiversity and a healthier living environment.

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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
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