
Practice
HEMAA Architectes
contact@hemaarchitectes.com
01.43.56.05.06
24-32 rue des Amandiers
Paris 75020
Philosophy
HEMAA is an architecture and urban planning agency founded by Charles Hesters and Pierre Martin-Saint-Etienne. The agency’s work spans all scales of architecture and land-use planning, both urban and rural. The diversity of projects we undertake—including public facilities, multi-family and single-family housing, and cultural venues—allows us to maintain a cross-disciplinary and open-minded approach that enriches and renews our thinking with each project. The solutions we develop are collectively crafted around a commitment to sustainable architecture that respects it site. We believe that the act of building must be generous and give back as much as it receives from its context. Weadvocate for architecture rooted in the history and geography of a place. Understanding its essence allows us to define the site layout, form, and lines, and to build using the materials best suited to each project and each location. Each situation offers an opportunity to reexamine the scale and impact of buildings on their environment in order to determine the appropriate size of built volumes; to fragment the mass; and to enhance the voids.
The school complex in Normandy was thus an opportunity to build in timber and local slate, drawing on traditional morphologies. The school in Sartrouville is built in load-bearing solid stone, the Childhood and Sports Center in Évry creates a village of pavilions in load-bearing rammed earth and timber at the heart of a park, and the house in Garches is partly constructed from millstone grit salvaged from the demolition of the existing building. This research into site integration, the use of bio-based or reclaimed materials, and local resources forms the foundation of our environmental approach. We eliminate every superfluous material to return to an architecture composed of its essential elements. Through the lens of this passive design approach, we also ensure that each project strives for energy and carbon efficiency throughout its entire life cycle. We believe that nature and architecture are not opposed to one another. On the contrary, the right dialogue between the two must be found in each project, so that these places and landscapes may find a new equilibrium.
Exhibitions
- 2025
- Maison de Banlieue et de l’Architecture – 'Matières à bâtir. Matériaux et vies bâtisseuses, des sols aux architectures franciliennes'
- 2025
- International Wood Forum (Forum Bois International) – Grand Palais, Paris
- 2022
- Manifesto Exhibition – La Plateforme Rennes, ENSA de Bretagne
- 2019
- Pavillon de l’Arsenal, Paris – Paris Rive Gauche: IP Factory Project (2nd Prize Finalist)
- 2014
- Pavillon de l’Arsenal, Paris – Futurs Immédiats: Archipel de Seine Project
Awards & Honors
- 2026
- FINALIST
The Architectural Review – AR Emerging Awards 2026 - 2025
- WINNER
Équerre d'Argent (First Work Award) for the Children’s & Sports Hub in Évry-Courcouronnes - 2024
- NOMINATION
European Union Prize for Contemporary Architecture
Mies van der Rohe Awards 2024 for Les Coteaux Fleuris primary school in Heudebouville - 2023
- WINNER
Europe 40 Under 40
The European Centre for Architecture Art Design and Urban Studies





Master’s Degree in Urban Planning – University of Athens
Architecte HMONP (State-certified) – 2012, ENSA Paris Val de Seine
Career
Since 2020 – Lecturer, EAV&T Paris-Est
2019 – Echelle Un Incubator, EAV&T Paris-Est
2018 – Co-founded HEMAA
2011–2018 – Brenac & Gonzalez & Associés
2012 – Gaëtan Le Penhuel Architectes
2011 – Philippe Gazeau Architecte
2009 – Hesters-Oyon Architectes
Teaching and research
Since 2020, Charles has been teaching at the École d'Architecture de la Ville & des Territoires Paris-Est and the École des Ponts ParisTech, leading master’s studios within the 'Matières à penser' (Materials for Thought) department.

Master’s Degree in Urban Planning – UFRJ, Rio de Janeiro, Brazil
Architecte HMONP (State-certified) – 2012, ENSA Paris Val de Seine
Certified PRO-PAILLE (Straw-bale Construction) & Earthen Construction Techniques
Career
Since 2020 – Instructor in HMONP Professional Practice, ENSA Paris-Val-de-Seine
2018–2020 – Assistant Studio Master, ENSA Paris-Malaquais
2019 – Echelle Un Incubator, EAV&T Paris-Est
2018 – Co-founded HEMAA
2011–2018 – Brenac & Gonzalez & Associés
2011 – Philippe Gazeau Architecte
2009 – Brunet Saunier Architecture
Teaching and research
From 2018 to 2020, Pierre served as an assistant studio instructor at ENSA Paris-Malaquais within the PASS Master’s and Diploma Studio. Since 2020, he has been a lecturer in the HMONP professional licensing curriculum at ENSA Paris-La Villette.
Team
The studio is a space of open dialogue and collective exploration. Our work is driven by the ideas and critical inquiry of the entire team. Projects belong to those who conceive, draw, and build them.

2026
- Aurélie DARGENT
- Administration, HR & Communications
- Juliette ESTIOT
- Project Director
- Helène FORMAN
- Project Director
- Amandine PATY
- Project Director
- Thibault MARTINEZ
- Project Manager
- Baptiste HALARD
- Project Manager
- Aurélie HETET
- Project Manager
- Marine BONVOISIN
- Project Manager
- Florianne MARQUER
- Assistant architecte
- Bruno ALHO
- Project Manager
- Béatrice CORSINI
- Project Manager
- Vincent WIEDER
- Project Manager
- Hortense LE CONIAC
- Project Manager
- Paul HEISSAT
- Project Manager
- Mathilde TISTCHENKO
- Project Manager
- Charlie BRUZZESE
- Project Manager
- Margaux DUPLA-BILE
- Junior Architect
- Alice BOURDERY
- Junior Architect
- Baptiste TOUZE
- Chargé de projet
- Chloé Lamarque
- Junior Architect
- Chiara Sottilini
- Junior Architect
- Boris TARNAVSKYY
- Architectural Apprentice
Passé.e.s à l'agence
Studio Alumni
- Isabelle Campagne
- Chloé Barbas
- Laura Pruvost
- Axel Gras
- Eusebio Calloix
- Sergio Barajas
- Benedikt Hummel
- Egor Shishkov
- Fanny Roméo
- Aliénor Laville
- Clarisse Marchal
- Audrey Mirocha
- Juliette Aujard
- Sylvain Bourreau
- Clémentine Thénot
- Anaïs Blanchard
- Louise Castelli
- Clément Ciesiolka
- Syrine Charfi
- Audrey Ayavou
- Camille Homsy
- Sara Topazio
- Emma Bienfait
- Tristan Laroche
- Roderic Archambault Lavigne
- Elise Hesters
Publications
- 2026
-
Maison des Services Publics
CREE n°418
Le Moniteur Pôle enfance et sportif des Loges The Architectural Review - October 2026
AMC - 2025-2026 Les 100 bâtiments de l'année
AMC - Équerre d'argent première Œuvre
Le Moniteur
CFSA - Winter 25-26 - 2025
- Groupe scolaire les Violettes CFSA Summer 25
- 2024
- Maison dans les Hauts-de-Seine A Vivre n°133
- 2023
-
Maison dans les Hauts-de-Seine
CREE n°406
Le Moniteur Heudebouville Architectural Record
AA n°453
d’a n°397 - 2022
-
Heudebouville
EXE n°50
Le Moniteur
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