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Rammed Earth Walls and Green Roofs Defining a Sustainable Retreat in Rural Portugal

Authors:
Joanna maria Lesna, Andrea Terceros
Rammed Earth Walls and Green Roofs Defining a Sustainable Retreat in Rural Portugal

Project in-detail

Constructed with rammed earth walls and topped by green roofs, this retreat harmoniously blends into the Portuguese landscape, offering a sustainable guest experience that prioritizes ecological integration and community engagement.
5 key facts about this project
01
Constructed using locally sourced rammed earth, enhancing thermal performance and sustainability.
02
Green roofs designed to support local biodiversity and manage stormwater effectively.
03
Floor-to-ceiling windows maximize natural light and connect interior spaces with the landscape.
04
Community spaces promote social interaction among guests while maintaining privacy.
05
Incorporates passive ventilation strategies to minimize reliance on mechanical cooling systems.

### Project Overview
Located in Portugal, the Verde Family Olive Guest House integrates architectural design with environmental sensitivity and cultural acknowledgment. It aims to facilitate a connection between guests and the surrounding landscape while offering a space for relaxation and community engagement.

### Spatial Strategy
Responding to the site's sloping terrain, the layout consists of interconnected volumes that compartmentalize functions while promoting fluid movement. The central tasting room serves as the heart of the guest house, encouraging social interaction and hospitality. Architectural features such as floor-to-ceiling windows optimize natural light and blur the boundaries between indoor and outdoor spaces. Courtyards and terraces enhance leisure opportunities, allowing guests to engage with nature while preserving privacy.

### Material Selection
The design employs locally sourced, sustainable materials that align with both aesthetic and ecological goals. Key materials include rammed earth for its thermal properties, pine wood for warmth, and limestone for durability. Terracotta tiles enhance traditional craftsmanship in the cellar area. The careful selection minimizes transportation impacts and supports local economies, reflecting a commitment to sustainability throughout the construction process.

### Sustainability Initiatives
A focus on passive design strategies includes natural ventilation systems, which reduce energy consumption. The placement of windows and doors facilitates airflow, contributing to thermal comfort without reliance on mechanical systems. Incorporating green roofs not only improves insulation and biodiversity but also aids in stormwater management. Reflective surfaces in the landscaping further augment natural light entry, minimizing the need for artificial lighting during daytime hours.

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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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