B3 ECODESIGN
B3 ECODESIGN is a French modular construction company that designs and builds low-carbon buildings from upcycled maritime shipping containers, serving individual homeowners, social housing operators, and construction firms across France through direct sales, as a subsidiary of Groupe Eiffage.
- Company typePrivate
- Founded2010
- HeadquartersLa Janais (near Rennes), France
- Headcount11–50
- GTM typeB2B and B2C
- OfferingHardware or Manufacturing
What B3 ECODESIGN does
B3 ECODESIGN is a French modular construction company that designs and manufactures low-carbon buildings from upcycled end-of-life maritime shipping containers. Founded in Brittany in 2010 and acquired by Groupe Eiffage's Construction division in 2019, the company operates from a single manufacturing workshop on the historic PSA-La Janais site near Rennes, where approximately 80% of each building is prefabricated off-site using lean manufacturing processes adapted from the automotive industry. The company has a headcount of 16 and a stated throughput capacity of 220 containers per year, producing roughly 100 m² of building per day from its workshop, with six weeks of on-site finishing. Buildings rely on corten-steel container structures, bioclimatic design principles, and high-performance thermo-acoustic insulation envelopes certified to RT 2012, RE 2020, and E+C- standards, with a documented minimum design life of 50 years.
The product portfolio spans three catalog residential models (Big Box at €190,000 for 103 m², Cross Box at €200,000, Patio Box at €223,000), Base vie construction site facilities, emergency and social housing, Tiny compact modules, modular Bulles de ventes for real estate developers, and collective and tertiary buildings. Pricing is unit-based and varies with surface area, configuration, and finishes; custom projects are delivered in 4–8 months, roughly half the timeline of traditional builds. Revenue is generated exclusively through one-time construction contracts under direct sales.
B3 ECODESIGN serves individual homeowners, social housing operators and municipalities (e.g., Saint-Jacques-de-la-Lande, Crous de Lorraine, Lagny-sur-Marne), construction firms (multiple Eiffage Construction regional entities, plus external clients such as LIDL), and real estate developers (Eiffage Immobilier). Distribution is direct-only, France-wide, and benefits from preferential access to the Eiffage Group pipeline; the company operates within the Eiffage Construction Solutions Industrialisées pole alongside sister companies SAVARE (wood construction) and HVA Concept (prefabricated bathrooms), with whom it collaborates on integrated industrial low-carbon offerings.
B3 ECODESIGN firmographics
Firmographics- Name
- B3 ECODESIGN
- Legal name
- B3 Ecodesign
- Website
- https://b3-ecodesign.com
- Company type
- Private
- Founded year
- 2010
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- B3 ECODESIGN is a French modular construction company that designs and builds low-carbon buildings from upcycled maritime shipping containers, serving individual homeowners, social housing operators, and construction firms across France through direct sales, as a subsidiary of Groupe Eiffage.
- Ownership category
- akta.pro rank
B3 ECODESIGN industry classification
Industry- Product category
- Modular Construction
- NAICS
- New Single-Family Housing Construction (except For-Sale Builders) (236115), Nonresidential Building Construction (2362), Drywall and Insulation Contractors (238310)
- SIC
- Mobile Homes (2451), Prefabricated Metal Buildings & Components (3448)
- akta.pro primary industry
- Residential Modular & Prefabricated Home Construction (IMAFABAF)
- akta.pro secondary industries
- Residential Green / High-Performance Home Construction (Net-Zero, Passive House) (IMAFABAH), Insulation & Air/Vapor Barrier Systems (Thermal, Acoustic, WRB/AVB) (IMAFAMAD)
Keywords
Where B3 ECODESIGN is headquartered
LocationHeadquarters
- HQ city
- La Janais (near Rennes)
- HQ country
- France
- HQ region
- Europe
Offices2 records
Markets served
B3 ECODESIGN business model
Business model- GTM type
- B2B and B2C
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Custom Modular Building Construction: B3 ECODESIGN designs and constructs bespoke modular buildings using repurposed maritime containers. Projects range from individual container homes to multi-unit collective housing, emergency shelters, and construction site base camps. Revenue is generated through one-time construction contracts with pricing based on surface area, configuration, materials, and interior finishes. The company also maintains a catalog of pre-designed models (Big Box, Cross Box, Patio Box) for faster project delivery.
- Ready-to-Move Container Home Models: Standardized catalog models (Big Box at €190,000, Cross Box at €200,000, Patio Box at €223,000) sold as modular homes to individual homeowners and investors, with customization options for additional fees.
- Construction Site Base Vie (Site Offices): Modular site office and welfare facilities for construction companies, including the Eiffage Group's own construction operations. Delivered as standalone or multi-level configurations with amenities.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Unit Pricing | Multi-year contract | Big Box model - starting price |
| Unit Pricing | Multi-year contract | Cross Box model - starting price |
| Unit Pricing | Multi-year contract | Patio Box model - starting price |
| Unit Pricing | Multi-year contract | Custom/sur-mesure projects |
Go-to-market motion2 records
Distribution channels3 records
Marketing channels6 records
B3 ECODESIGN product offering
Product offeringCore offering
B3 ECODESIGN designs, manufactures, and installs modular buildings made from upcycled end-of-life maritime shipping containers (corten steel), with up to 80% of construction completed off-site at its workshop near Rennes. Its portfolio spans catalog single-family container homes (Big Box, Cross Box, Patio Box), construction-site welfare facilities (Base vie), emergency/social housing, Tiny compact modules, sales pavilions (Bulles de ventes), collective residential buildings, and tertiary office buildings — all featuring bioclimatic design and high-performance thermo-acoustic insulation compliant with RT 2012 and RE 2020 standards.
Product overview
B3 Ecodesign is a modular construction company specializing in low-carbon buildings made from recycled maritime containers. The company operates as part of Eiffage Construction's Solutions Industrialisées pole and develops its products at 80% in its workshop near Rennes, France. The product portfolio centers on container-based modular construction including three catalog house models (Big Box, Cross Box, Patio Box), construction site facilities (Base vie Eiffage), emergency housing solutions, compact Tiny modules, and modular sales bubbles. All products feature contemporary architectural design, thermal performance, and low-carbon credentials through upcycling of end-of-life shipping containers.
Differentiator
Problem solved
Functional benefit
Products and services
- Big Box Single-level container home model using stacked maritime containers to provide 103 m² of optimized living space, targeted at first-time buyers seeking contemporary, low-carbon housing. Starting from €190,000, with customization options available.
- Cross Box Cross-shaped container home with a double cantilever design that creates a terrace and carport, marketed to space-conscious buyers. Starting from €200,000, with customization options available.
- Patio Box Single-level container home design centered around an integrated enclosed patio, offering spacious and intimate living with natural light. Starting from €223,000, with customization options available.
- Base vie Eiffage Construction site welfare facilities and offices built from recycled maritime containers, featuring wood interiors, large windows, LED lighting, and high thermal performance. Available in standalone or multi-level configurations for construction companies and Eiffage Group entities.
- Hébergement d'urgence Emergency and temporary housing solutions built from recycled maritime containers, providing dignified and reusable modular buildings for urgent accommodation needs such as migrant, homeless, and vulnerable population housing.
- Modules complets Tiny Compact modular living units designed for small-space living, offering fully equipped habitat solutions in a minimalist format.
- Bulles de ventes Modular sales pavilions for real estate developers, available in 28 m² and 50 m² formats. Eco-designed from recycled maritime containers, movable and reusable for different sites, used as promotional sales offices and project houses.
- Logements collectifs Collective housing buildings constructed from recycled maritime containers, providing modular, evolutive, low-carbon multi-unit residential buildings with contemporary architectural design for property developers and social landlords.
- Bâtiments tertiaires Tertiary office and commercial buildings built using modular container construction techniques, featuring contemporary design and low environmental impact for businesses and public-sector clients.
- Maisons individuelles Single-family container homes available as catalog models (Big Box, Cross Box, Patio Box) or fully custom designs, featuring architectural design and modular configurations tailored to the buyer's terrain and lifestyle.
Quantifiable outcome
- Construction timelines 50% shorter than traditional builds — delivery in 4–8 months vs ~12 months for traditional houses
- +3 more outcomes
Companies that use B3 ECODESIGN
Customer profileNamed customers8 records
Segments5 records
Ideal customer profiles3 records
B3 ECODESIGN technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
B3 ECODESIGN partnerships and signals
Strategic signalPartnerships
Seven partnerships are on record, tiered core and minor.
- Groupe Eiffage (Construction Division)coreB3 ECODESIGN has been part of the Eiffage Construction branch since 2019. Eiffage provides financial backing, industrial resources, and access to the broader Eiffage project pipeline. The acquisition enabled B3 ECODESIGN to accelerate innovation and expand its product range. Eiffage Construction's Solutions Industrialisées pole includes B3 ECODESIGN alongside SAVARE (wood construction) and HVA Concept (prefabricated bathrooms), enabling cross-company project collaboration.
- SAVAREcoreSAVARE is a sister company within the Eiffage Construction Solutions Industrialisées pole, specializing in sustainable wood construction for over 40 years. Companies collaborate on integrated low-carbon construction projects, combining container modular (B3 ECODESIGN), wood structural (SAVARE), and prefabricated bathroom (HVA Concept) solutions into a comprehensive industrial construction offer. B3 ECODESIGN also supplies maritime containers to SAVARE for use as structural elements in SAVARE's building projects.
- HVA ConceptcoreHVA Concept is a sister company within the Eiffage Construction Solutions Industrialisées pole, specializing in industrial prefabricated bathrooms. Part of the joint low-carbon construction solutions offer alongside B3 ECODESIGN (modular containers) and SAVARE (wood construction), enabling comprehensive 100% industrialized construction programs.
- Eiffage ImmobiliercoreEiffage Immobilier, the real estate development arm of the Eiffage Group, partnered with B3 ECODESIGN to develop sales experience centers (bulles de vente) and residential projects including the Green Park program near Rouen. The collaboration leverages B3 ECODESIGN's modular container expertise for Eiffage Immobilier's property marketing and development programs.
- Upsilon Architecture FirmminorUpsilon designed the center for unaccompanied minors at Saint-Jacques-de-la-Lande (35), working with B3 ECODESIGN to create modular temporary accommodation using maritime containers. The project demonstrates B3 ECODESIGN's ability to collaborate with third-party architects on specialized social housing projects.
- Salin ArchitectureminorSalin Architecture collaborated with B3 ECODESIGN and the Marne et Gondoire community on an emergency housing project at Lagny-sur-Marne (77), using 8 maritime containers to create 4 dignified temporary housing units for displaced populations.
- 2A Designminor2A Design is an architecture firm referenced across multiple B3 ECODESIGN projects as the designer of specific container home models. Featured on model photos and project images including the Acigné Technicolor house, Cross Box, and various exterior renderings.
Scale indicators8 records
Recent moves7 records
Expansion highlights5 records
B3 ECODESIGN competitors and assessment
Company assessmentDirect peers
- Casa Container (Maisons Containers Etc.): French container home builder offering catalog and custom modular homes from shipping containers. Directly competes with B3 ECODESIGN's catalog homeowner segment with comparable pricing and similar maritime container upcycling methodology.
- Tempo Housing: Dutch modular builder specializing in container-based temporary and permanent housing, including student and emergency housing. Directly comparable in product mix (student, emergency, residential) and use of maritime containers as primary structural elements.
- HVA Concept: Sister company within Eiffage Construction Solutions Industrialisées pole, producing industrial prefabricated bathroom modules. Direct peer in the modular industrial construction space, jointly marketed with B3 ECODESIGN in integrated low-carbon construction programs.
- SAVARE: Sister company within the Eiffage Construction Solutions Industrialisées pole, specializing in sustainable wood-frame construction for 40+ years. Operates as a direct parallel to B3 ECODESIGN with comparable off-site industrialization approach, serving similar collective housing and social housing clients, and even receiving containers from B3 ECODESIGN as structural elements.
- Container City (Urban Space Management): Pioneer UK-based container architecture firm developing multi-storey residential and commercial buildings from shipping containers since 2001. Direct peer in container-based modular construction with similar bioclimatic and adaptive reuse positioning.
Emerging players
- Plant Prefab: US-based custom modular home builder using factory-built panels and modules for sustainable residential construction. Comparable in factory prefabrication approach and focus on low-carbon, design-driven housing, though using wood-based rather than container-based structure.
- Honomobo: Canadian container home manufacturer offering modular residential units from shipping containers with design-led aesthetics. Comparable in maritime container upcycling approach and catalog model strategy, though serving North American market.
Broad incumbents
- Cougnaud Construction: Major French modular construction company offering industrial prefabricated buildings across residential, educational, healthcare, and commercial sectors. Comparable to B3 ECODESIGN's collective housing and tertiary building offerings, with broader product portfolio and larger scale.
- Algeco: European leader in modular space solutions including construction site offices, modular buildings, and portable accommodation. Directly comparable to B3 ECODESIGN's Base Vie Eiffage site office product line, serving the same construction site welfare and temporary building market with much larger scale.
- Bouygues Construction (Linkcity / Habitat Social): Major French construction group with industrialized construction division focused on low-carbon residential and modular solutions. Represents a broad incumbent with overlapping capability in modular collective housing and access to comparable municipal and social housing contracts.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat5 records
Key risks5 records
Key highlights6 records
Customer concentration
B3 ECODESIGN social profiles
Digital presenceB3 ECODESIGN compliance and trust
Trust signalCompliance3 records
B3 ECODESIGN financial estimates
Financial estimateRevenue estimate
Valuation estimate
B3 ECODESIGN leadership team
Management profileNumber of profiles
Profiles1 record
B3 ECODESIGN funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
B3 ECODESIGN M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about B3 ECODESIGN
What does B3 ECODESIGN do?
B3 ECODESIGN designs, manufactures, and installs modular buildings made from upcycled end-of-life maritime shipping containers (corten steel), with up to 80% of construction completed off-site at its workshop near Rennes. Its portfolio spans catalog single-family container homes (Big Box, Cross Box, Patio Box), construction-site welfare facilities (Base vie), emergency/social housing, Tiny compact modules, sales pavilions (Bulles de ventes), collective residential buildings, and tertiary office buildings — all featuring bioclimatic design and high-performance thermo-acoustic insulation compliant with RT 2012 and RE 2020 standards.
Is B3 ECODESIGN a public or private company?
B3 ECODESIGN is a private company. It is classified as corporate owned and is currently operating.
When was B3 ECODESIGN founded?
B3 ECODESIGN was founded in 2010. It employs 11 to 50 people.
Where is B3 ECODESIGN based?
B3 ECODESIGN is headquartered in La Janais (near Rennes), France, in the Europe region.
How does B3 ECODESIGN make money?
Three revenue lines are on record. Custom Modular Building Construction is the primary driver. The others are ready-to-Move Container Home Models and construction Site Base Vie (Site Offices).
Who are B3 ECODESIGN's main competitors?
Direct peers on record are Casa Container (Maisons Containers Etc.), Tempo Housing, HVA Concept, SAVARE and Container City (Urban Space Management). Emerging players are Plant Prefab and Honomobo. Broad incumbents are Cougnaud Construction, Algeco and Bouygues Construction (Linkcity / Habitat Social).
Does B3 ECODESIGN have an API?
No public API is recorded for B3 ECODESIGN.
What industry is B3 ECODESIGN in?
B3 ECODESIGN's product category is Modular Construction. Its primary akta.pro industry code is IMAFABAF, Residential Modular & Prefabricated Home Construction, with a secondary code of IMAFABAH, Residential Green / High-Performance Home Construction (Net-Zero, Passive House). Its NAICS code is 236115 and its SIC code is 2451.