Architecture practice HEMAA Architectes, led by Charles Hesters and Pierre Martin-Saint-Etienne,  is an architecture firm that embraces a contextual, sobriety-based approach rooted in the living world. Each project emerges from a careful reading of its surroundings, seeking a balance between nature, use, and material.

In Évry-Courcouronnes (Greater Paris – France), the Parc des Loges Childhood and Sports Center fully embodies this philosophy: a gentle, landscape-based composition built from bio- and geo-sourced materials, serving a public facility that is open, generous, and sustainable. The design was awarded the Price of Première Œuvre of the Équerre d'Argent – 2025.

The project designed by HEMAA Architectes adapts to the topography, organized into five units—nursery, primary school, children's center, cafeteria, and sports grandstand—around a landscaped courtyard and connected by glazed walkways that facilitate natural light and a connection with the surrounding environment. The architecture, built with load-bearing rammed earth and wood, extends the school into the park via pathways through the trees, creating a kindergarten inspired by the Waldkindergarten, where learning is playful and linked to nature.

The environmental approach is rigorous: the rammed earth facades reuse soil from the Grand Paris metro, the green roofs improve comfort and water management, and the orientation and passive elements regulate light and ventilation. Vegetation and bio-sustained materials reduce the urban heat island effect and promote biodiversity. The combination of wood, earth, and low-carbon concrete creates a warm, tactile environment ideal for children.

The sports complex extends this architectural language, with a 300-seat grandstand and a gently sloping roof that preserves light and views, consolidating a shared and open public space in the heart of the city.

Centro Infantil y Deportivo Parc des Loges por Hemaa Architectes. Fotografía por Sergio Grazia.

Parc des Loges Childhood and Sports Center by Hemaa Architectes. Photograph by Sergio Grazia.

Centro Infantil y Deportivo Parc des Loges por Hemaa Architectes. Fotografía por Sergio Grazia.

Parc des Loges Childhood and Sports Center by Hemaa Architectes. Photograph by Sergio Grazia.

Project description by HEMAA Architectes

An Architecture with Deep Roots
Perfectly integrated into the site’s natural topography, the project follows the slope without artificial alteration. Five entities—nursery, elementary school, childminders’ hub, cafeteria, and sports stand—are arranged around a central garden courtyard, sheltered from the street yet open to the landscape. Connected by delicate glazed walkways, these autonomous volumes encourage natural light, visual connections, and a relationship with the living environment. An allegory of the constituent materials of the lodge park, the facades are made of load-bearing rammed earth and the interior framework is entirely wooden.

Pathways meander between newly planted trees, extending the school naturally into the park. The children’s garden becomes a tamed forest, planted with oaks, ashes, maples, and elms, and punctuated by a clearing inviting free play. Inspired by the Waldkindergarten philosophy, the project offers a playful and immersive vision of learning—one that is deeply anchored in nature and the living world.

Parc des Loges Childhood and Sports Center by Hemaa Architectes. Photograph by Sergio Grazia.
Parc des Loges Childhood and Sports Center by Hemaa Architectes. Photograph by Sergio Grazia.

Sobriety-oriented materials
The entire project follows a demanding environmental approach. The 665 m³ of load-bearing earth used for the façades—equivalent to 1,330 m² of 50-cm-thick walls—were sourced from the Grand Paris metro tunnel excavations. Insulated with hemp wool, these walls retain the natural breathability of rammed earth. The green roofs (15–20 cm of substrate) enhance thermal comfort and support natural water management. Adjustable sunshades and deep roof overhangs regulate sunlight naturally. The building orientation captures winter light and promotes natural summer ventilation. Abundant, diverse vegetation limits urban heat island effects and strengthens local biodiversity.

Wood and rammed earth create a soft, rooted architecture with simple geometric shapes. In this working-class community, where many children do not leave the city during school breaks, the childhood center is meant to be both a place of learning and a space for escape. Rammed earth —a living, breathable material—invites touch and provides a unique setting for children growing up in a city largely built from concrete. Wood, warm and tactile, defines the interiors and the structure. At the base, low-carbon textured concrete, punctuated with glazed panels at child height (60 cm), combines sturdiness, natural light, and intimacy.

Centro Infantil y Deportivo Parc des Loges por Hemaa Architectes. Fotografía por Sergio Grazia.  Parc des Loges Childhood and Sports Center by Hemaa Architectes. Photograph by Charles Bouchaid.
Parc des Loges Childhood and Sports Center by Hemaa Architectes. Photograph by Charles Bouchaid.

A Shared Facility
The sports complex naturally extends this architectural language. Its 300-seat grandstand, perfectly oriented, ensures optimal viewing comfort. Its gently sloping roof lowers toward the leisure area, preserving light and views within the courtyards. Integrated into the whole, it reinforces the idea of a shared, intergenerational, and open public space at the heart of the city.

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Architects
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Collaborators
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Rammed Earth Consultant.- BETerre.
Engineering & Cost Consultant.- ANA Ingénierie.
Landscape & Biodiversity.- Wald.
Project Coordination (OPC).- JDM Ingénierie.

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Client
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City of Évry-Courcouronnes (Greater Paris – France).

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Contractors
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Earthworks & Civil Engineering.- TERRE ET PIERRE.
Structural Work & Rammed Earth.- DONATO.
Timber Structure.- CUNIN.
Roofing & Waterproofing.- SARMATES.
External Joinery & Shutters.- DITER.
Metalwork.- ENVIRONNEMENT SERVICES.
Kitchen Partitions.- FROID 77.
Plaster & Ceilings.- BATHELEC.
Interior Joinery.- PESCIA MENUISERIE ET BÂTIMENT.
Floor & Wall Finishes.- SERTAC.
Painting & Wall Coverings.- LES PEINTURES PARISIENNES.
Plumbing, Heating & Ventilation.- LGC / BE MAROLLE.
Electrical (High & Low Current).- TARDY.
Kitchen Equipment.- FROID 77.
Landscaping.- IDVERDE.

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Floor area.- 2,444 m² + 50 underground parking spaces.
Outdoor spaces.- 3,854 m².

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Delivery.- August, 2025.

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Venue / Location
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Evry-Courcouronnes (Greater Paris), France.

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Photography
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Charles Bouchaib, Thibault Martinez, Sergio Grazia.

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HEMAA Architectes is an architecture and urban planning studio founded in 2018 by Charles Hesters and Pierre Martin-Saint-Etienne. They undertake projects of all scales, encompassing public facilities, collective and individual housing, and cultural spaces, with an open and avant-garde approach.

Charles Hesters is an architect (HMONP) who graduated in 2012 from Paris Val de Seine and holds a Master's degree in Urban Planning from the University of Athens. He has worked at studios such as Brenac & Gonzalez & Associés, Gaëtan Le Penhuel, and Philippe Gazeau, and previously at Hesters-Oyon Architectes. After co-founding HEMAA in 2018 and participating in the Échelle Un incubator at EAV&T Paris-Est, he has been teaching at EAV&T Paris-Est and École des Ponts ParisTech since 2020, in the "matières à penser" department at the Master's level.

Pierre Martin-Saint-Etienne is an HMONP architect trained in Paris Val de Seine and holds a Master's degree in Urban Planning from UFRJ in Rio de Janeiro, in addition to specialized training in straw bale and earth construction. His professional experience includes stints at Brenac & Gonzalez & Associés, Philippe Gazeau, and Brunet Saunier, before co-founding HEMAA in 2018 and also participating in the Échelle Un incubator. Between 2018 and 2020, he was a teaching assistant at ENSA Paris-Malaquais within Studio PASS, teaching both Master 1 and the PFE program, and since 2020 he has been involved in the HMONP training program at ENSA Paris-La Villette.

Together, Hesters and Martin-Saint-Etienne develop a body of work that combines research, teaching, and built projects, guided by a shared conviction: to design architecture deeply conscious of its time and place, capable of engaging with nature and offering new, more respectful, understated, and sensitive ways of living.

Each project thus becomes an opportunity to question the scale and impact of buildings, adjust the dimensions of volumes, fragment masses, and dignify voids. The school complex they built in Normandy, for example, allowed them to work with local wood and slate, revisiting traditional forms. In Sartrouville, the school is built of solid load-bearing stone; in Evry, the Pôle Enfance is configured as a small village of pavilions constructed of rammed earth and wood in the heart of a park; and the house in Garches incorporates walls of reclaimed meulière stone from the demolition of the existing building. These investigations into site integration, the use of bio-sustained or reused materials, and the mobilization of local resources form the basis of their environmental approach. They eliminate all superfluous materials to return to an architecture composed of its essential elements and, through a passive design approach, strive for each project to achieve energy and carbon neutrality throughout its entire life cycle. They believe that nature and architecture are not opposites, but rather must find a suitable balance in each intervention so that, after their work, places and landscapes regain a new harmony.

HEMAA's trajectory has been accompanied by several exhibitions at leading institutions. In 2025, they participated in the Forum Bois International at the Grand Palais in Paris; in 2022, they presented their work at the Manifeste exhibition at La Plateforme Rennes of ENSA de Bretagne; and in 2019, they were finalists for the IP Factory project at the Pavillon de l’Arsenal as part of the Paris Rive Gauche exhibition. And in 2014 they exhibited at Futurs Immédiats, also at the Pavillon de l’Arsenal, with the Archipel de Seine project. Their work has also received outstanding recognition: in 2025 they won the Équerre d’Argent Première Œuvre for the Évry-Courcouronnes children's and sports center; in 2024 they were nominated for the European Union Prize for Contemporary Architecture —Mies van der Rohe Award— for the Heudebouville school complex; and in 2023 they were selected as Europe 40 Under 40 by The European Centre for Architecture Art Design and Urban Studies.

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Published on: November 27, 2025
Cite:
metalocus, ANTONIO GRAS
"Building with earth and wood. Parc des Loges Childhood and Sports Center by Hemaa Architectes" METALOCUS. Accessed
<https://www.metalocus.es/en/news/building-earth-and-wood-parc-des-loges-childhood-and-sports-center-hemaa-architectes> ISSN 1139-6415
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