BM architectes

What BM architectes does

BM architectes is a privately held French architecture firm founded in 2008 and headquartered in Meudon, Île-de-France, with a second office in Le Mans (Pays de la Loire). The firm specializes in off-site integrated (hors-site intégré) wood construction, applying prefabricated timber systems — including platform frame (ossature bois), CLT mass timber, and modular 3D volumetric units — to social housing, individual homes, public equipment, and healthcare facilities. Its methodology is supported by BIM-based collaborative design (since 2017) and a curated ecosystem of more than 50 industrial partners (carpenters, engineers, BIM managers, material suppliers) who serve as mandataires and general contractors in design-build (conception-réalisation) competitions.

The firm operates the proprietary so'BOIS housing line, offering reproducible prefabricated wood home models (CUBE 45, PENTE 45, LIGNE 45) under the French CMI contract framework, positioned between mass-builder products and bespoke architectural design. Revenue is generated through professional services fees for architectural design missions (base mission, partial execution, project management), with project values ranging from approximately €120k for micro-extensions to over €6M HT for large collective housing developments. The client base is dominated by French public social housing operators (Sarthe Habitat, Le Mans Métropole Habitat, CDC Habitat, LORIENT Habitat, OPH Antony Habitat, Aquitanis, HABITAT 44), communes and public institutions, and private individuals.

The firm is led by Stéphane Béranger (Responsable de publication) and operates with a lean team of 6 employees, winning primarily through public procurement competitions. It has no external funding, no parent company, and no disclosed subsidiaries. Notable recognition includes the Prix Aperçu Sarthe 2021 from CAUE de la Sarthe, and the firm is referenced in the 2023 Hors-Site Barometer as a practitioner of integrated off-site construction methods backed by French government policy.

Name

BM architectes

Legal name

bm architectes

Website

https://bmarchitectes.fr

Company type

Private

Founded year

2008

Operating status

Operating

Headcount range

1–10 employees

Short description

BM architectes is a French architecture firm specializing in off-site prefabricated wood construction and BIM methodology, founded in 2008 and serving social housing operators, municipalities, and private individuals across France through design-build competitions and proprietary so'BOIS housing products.

Ownership category

akta.pro rank

Headquarters

HQ city

Meudon

HQ country

France

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Architectural design and engineering services: BM Architectes generates revenue through fees for architectural design services — base mission (mission de base), partial execution (EXE partielle), and sometimes full project management including furniture and kitchen equipment. Services are billed on a per-project basis, typically for public housing operators, municipalities, healthcare groups, and private individuals.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

BM architectes is an architecture firm delivering integrated off-site (hors-site) prefabricated timber construction services for collective housing, individual housing, and public equipment projects. The firm designs using BIM methodology, partners with industrial charpentiers for prefabrication and assembly, and offers a proprietary reproducible housing line called so'BOIS (CUBE 45/56, PENTE 45, LIGNE 45) for private clients under CMI contract. Services are provided to social housing operators, municipalities, healthcare groups, and private individuals across France, primarily through public design-build competitions (conception-réalisation).

Product overview

BM architectes (BMa) is an architecture firm specializing in timber construction and off-site (hors-site) integrated building solutions since 2008. The firm's core offering centers on the Hors-Site Intégré methodology, combining prefabricated wood structural systems with a collaborative project approach across a network of industrial partners. The product portfolio includes: (1) the so'BOIS line — reproducible, adaptable prefabricated wood house models (CUBE 45, CUBE 56, LIGNE 45, PENTE 45) designed for tight budgets between standard contractor and bespoke architect-built homes; (2) Architecture Ossature Bois services covering timber frame and CLT construction for individual, collective, and equipment programs; (3) a Conception-Réalisation (design-build) delivery model guaranteeing costs and deadlines; and (4) RE2020 compliance consulting. BIM modeling (since 2017) underpins all project delivery, with digital collaboration tools integrated throughout. The firm operates across two locations (Île-de-France and Pays de la Loire) and serves public and private clients on housing, collective housing, and public equipment projects.

Differentiator

Problem solved

Functional benefit

Products and services

• Hors-Site Intégré (Integrated Off-Site Construction) A collaborative construction methodology combining architectural design, BIM-based project management, and off-site prefabricated timber construction delivered through a partner ecosystem; reduces construction timelines by 30% and is targeted at clients seeking faster, lower-carbon, lower-disruption building delivery. It is the firm's flagship service platform, used across public and private commissions.
• so'BOIS Prefabricated Wood Housing System Proprietary family of reproducible, adaptable prefabricated timber houses — CUBE 45, CUBE 56, PENTE 45, and LIGNE 45 — with modular plans where only the façades are load-bearing, allowing flexible room configurations over time. Sold to private clients under CMI (Contrat de Construction de Maison Individuelle) contracts and featuring adjustable sunshades and systematic wood prefabrication for thermal comfort and energy performance.
• Architecture Ossature Bois (Timber Frame Architecture) Architectural design services for wood frame (ossature bois) and CLT timber construction projects including individual houses, collective housing, extensions, renovations, and public equipment buildings. Uses renewable, CO2-neutral timber and meets successive French thermal regulations (RT 2005, RT 2012, RE2020, BBC, THPE).
• Conception-Réalisation (Design-Build) Project Delivery Design-build project delivery model in which BM architectes provides integrated architectural design and project execution through partner industrial charpentiers/general contractors; typically awarded through public procurement competitions and used to guarantee cost and schedule certainty for collective and grouped housing projects for social landlords and municipalities.
• RE2020 Compliance Consulting Advisory service helping clients achieve France's 2020 Environmental Regulation (RE2020) compliance across carbon impact, energy performance, summer comfort (confort d'été), indoor air quality, and circular economy requirements for new buildings.

Quantifiable outcome

• Construction timelines reduced by 30% through prefabrication
• +3 more outcomes

Named customers20 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

27 partnerships are on record, tiered core and minor.

• Charpente CENOMANEcoreStrategic or Co-development PartnerLong-standing strategic partner serving as mandataire and/or general contractor in multiple design-build competitions. CENOMANE specializes in charpente (timber framing) and wood structures. Projects include 22 housing units (Seiches-sur-le-Loir, 2022), Maison avec Vue (Le Mans, 2016), multiple so'BOIS models (CUBE 45/56, PENTE 45, LIGNE 45), 50 housing units (Lorient), 39 housing units (La Chapelle-sur-Erdre), and 18 housing units (Le Mans).
• WEDGWOODcoreStrategic or Co-development PartnerWood construction company responsible for prefabricated ossature bois (platform frame) construction on multiple residential projects. Executed Maison & cabinet médical (Clamart, 2007), Extension d'une maison bourgeoise (Orsay, 2008), and Extension en fond de cour (Malakoff, 2006).
• SOCOPAcoreStrategic or Co-development PartnerIndustrial prefabricator of wood houses. Prefabricated, lifted, and assembled Maison dans les arbres (Sèvres, 2010) in three weeks, and Maison de ville Neuve (Montrouge, 2012) with partner CCTO.
• ROUSSEAUcoreStrategic or Co-development PartnerCharpente et ossature bois company serving as mandataire and general contractor for major design-build collective housing projects. Partnered on 50 housing units (Lorient, 2020), 39 housing units (La Chapelle-sur-Erdre, 2019), and 28 housing units (Sannois, 2018).
• OSSABOIScoreStrategic or Co-development PartnerWood frame specialist serving as mandataire and general contractor. Partnered on 16 grouped houses (Antony, 2017, certified RT 2012 -30% Effinergie PLUS) and 35 housing units (Triel-sur-Seine, 2019).
• ETCO IngénierieminorImplementation/ SI/ Consulting PartnerEngineering consultancy providing economy, structure, fluids, and thermal engineering. Partnered on Centre médico psychologique (2009), Centre sportif (Vénizel, 2009), and 30 grouped houses (Sablé-sur-Sarthe, 2009).
• CARRE D'AIREminorImplementation/ SI/ Consulting PartnerConstruction economics and engineering consultancy. Partnered on 18 housing units (Le Mans, 2022), 36 student housing units (Le Mans, 2020), 36 housing units (Yvré-l'Évêque, 2018), 22 housing units (Seiches-sur-le-Loir, 2022), and extension & renovation of AXPLORA laboratories (Le Mans, 2023).
• VESTACKcoreStrategic or Co-development PartnerOff-site and low-carbon building specialist (conçoit & construit des bâtiments hors-site & bas-carbone). Serves as mandataire and general contractor for 16 intermediate wood housing units (Montigny-la-Resle, 2025, RE2020 threshold 2028 + E2C1).
• T&HcoreStrategic or Co-development PartnerIndustrial partner specializing in 3D modular prefabricated housing units. Serves as mandataire and general contractor for 12 grouped wood housing units (Saint-Bonnet-de-Mure, 2025, RE2020 threshold 2028 + E2C1).
• DELAGE CharpenteminorStrategic or Co-development PartnerCarpentry company that executed the CLT NOVATOP panel construction for Maison d'angle (Meudon, 2018), using Swiss NOVATOP system for structural walls and floors.
• CRUARD CharpentecoreStrategic or Co-development PartnerWood frame and carpentry company. Executed 36 housing units (Yvré-l'Évêque, 2018) as mandataire and general contractor, delivering prefabricated ossature bois on a 12-month optimized schedule.
• OTEISminorImplementation/ SI/ Consulting PartnerBuilding engineering consultancy (eau, environnement & BIM). Partnered on Maison en long (Le Mans, 2022) and 36 student housing units (Le Mans, 2020).
• RACINE BEminorImplementation/ SI/ Consulting PartnerWood structure engineering consultancy. Partnered on Maison avec Vue (Le Mans, 2016), 22 housing units (Seiches-sur-le-Loir, 2022), and extension of AXPLORA laboratories (Le Mans, 2023).
• ABAKminorImplementation/ SI/ Consulting PartnerEngineering consultancy for wood, concrete & metal structures and 2D/3D prefabricated solutions. Partner on mixed wood/concrete offices (Saint-Pavace, 2026) and multiple social housing competitions (Pont-l'Évêque, Bayeux).
• EMENDAminorImplementation/ SI/ Consulting PartnerBIM management, consulting, training, AMO, audit and modeling partner. Active on AXPLORA extension (Le Mans, 2023) and village solidaire (Trignac, 2024).
• BIM BAM BOOMminorImplementation/ SI/ Consulting PartnerBIM manager and auditor providing modeling, AMO, and BIM training. Listed as strategic BIM partner alongside ALTAM.
• SO-DE-REFminorImplementation/ SI/ Consulting PartnerInfrastructure and environment engineering consultancy. Partner on feasibility studies (La Chapelle Saint-Aubin, 2020) and various public housing competitions.
• SENOVAminorImplementation/ SI/ Consulting PartnerThermal and fluid engineering consultancy. Partnered on numerous residential projects including so'BOIS models, Maison dans les arbres (Sèvres), and Maison de ville (Montrouge, Viroflay).
• JYVAMA ConceptminorImplementation/ SI/ Consulting PartnerThermal engineering consultancy. Partnered on Maison tour (Clamart), Maison & cabinet médical (Clamart), Maison dans la forêt (Bures-sur-Yvette), and Maison cinétique (Sèvres).
• GESMIERminorStrategic or Co-development PartnerWood construction company. Partnered on Maison dans la forêt (Bures-sur-Yvette, 2010) with MATHIS, and Maison de week-end (Port-Villez, 2008).
• Cuiller frèrescoreStrategic or Co-development PartnerWood frame company. Mandataire and general contractor for 10 grouped wood housing units (Seine-Maritime, 2014) under framework contract with OPH Habitat 76.
• FRAMEWORKSminorImplementation/ SI/ Consulting PartnerOff-site, low-carbon and innovation consulting partner. Listed as assistant maître d'ouvrage partner for off-site construction advisory.
• HORS-SITE conseilminorImplementation/ SI/ Consulting PartnerOff-site project consulting partner. Listed as assistant maître d'ouvrage specializing in off-site construction projects.
• LCAminorImplementation/ SI/ Consulting PartnerEnergy performance and fluid engineering consultancy. Partnered on 18 housing units (Le Mans, 2022) and 22 housing units (Seiches-sur-le-Loir, 2022).
• WBIminorStrategic or Co-development PartnerPrefabricator, general contractor and mandataire for village solidaire de 10 studios (Trignac, 2024, RE2020, E2C2, BBC label).
• URBATERRAminorImplementation/ SI/ Consulting PartnerUrbanism, landscape and VRD engineering consultancy. Partnered on 36 housing units (Yvré-l'Évêque, 2018) and 18 housing units (Le Mans, 2022).
• SOMAREcoreStrategic or Co-development PartnerPartner with CENOMANE in the groupement for young worker housing (Le Mans, 2021). SOMARE serves as mandataire and general contractor for 36 student housing units (Le Mans, 2020).

Scale indicators4 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• Algeco: European leader in modular space and building solutions, serving public and private clients with off-site constructed units. Operates at much larger scale than BM architectes but competes for similar prefab-based project mandates.
• Cougnaud Construction Modulaire: Major French modular construction company offering industrialized building solutions across commercial, educational, and residential sectors. Broader portfolio than BM architectes but overlaps in prefabrication-based delivery for institutional clients.
• Wilmotte & Associés: Major Parisian architecture practice with diversified portfolio including residential, hospitality, and cultural projects. Operates at significantly larger scale and broader scope than BM architectes' niche specialization.
• Dominique Perrault Architecture: Internationally renowned French architecture firm led by Dominique Perrault, with projects spanning institutional, cultural, and residential sectors. Competes for major French public commissions but at much larger scale.
• Architecture-Studio: Major French architecture firm with global practice spanning cultural, residential, and urban projects. Much larger scale and broader portfolio than BM architectes, but competes for institutional and social housing commissions in France.

Direct peers

• Ossabois: French prefabricated wood-frame building manufacturer and general contractor that also serves as mandataire on BM architectes design-build projects (e.g., 35 units Triel-sur-Seine, 16 units Antony). Comparable in prefab wood expertise and social housing customer base.
• Mathis: French timber construction company specializing in prefabricated wood structures for residential and public projects. Both a collaborator on BM projets and a comparable prefab wood specialist serving social housing clients across France.
• Tétrarc: Nantes-based architecture firm with strong expertise in sustainable construction, wood structures, and timber-framed public buildings. Directly comparable as a French mid-sized architecture practice focused on low-carbon design.
• Vestack: French off-site, low-carbon construction specialist that designs and builds timber buildings. Both a partner on specific projects and a direct competitor in the same niche as BM architectes' Hors-Site Intégré methodology, targeting social housing operators.
• Tolila+Gilliland: French architecture firm recognized for material innovation and timber-based design, including prefabricated and low-carbon housing prototypes. Comparable boutique scale with similar emphasis on environmental performance.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Customer concentration

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Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

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M&A

Investments

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Frequently asked questions about BM architectes