5-Cinq
5-Cinq is a privately held French multidisciplinary architecture, engineering, and environmental consulting firm with 70+ staff across five regional offices, delivering integrated design services in housing, public facilities, brownfield rehabilitation, and tertiary buildings for government, banking, and real estate clients.
- Company typePrivate
- Founded-
- HeadquartersSerris, France
- Headcount51–100
- GTM typeB2B
- OfferingServices
What 5-Cinq does
5-Cinq is a privately held French multidisciplinary architecture, engineering, and environmental consulting firm headquartered in Serris (Île-de-France), operating as a SAS (Société par Actions Simplifiée). Founded from the consolidation of five specialist agencies in architecture, engineering, and environment, the firm delivers integrated design services spanning housing, public facilities, industrial brownfield rehabilitation, tertiary buildings, renovation, large-scale projects, landscape architecture, and urban planning. The company employs more than 70 collaborators, including 21 architects, 9 engineers, and 4 landscape architects-urban planners, distributed across five regional offices in Serris, Paris, Troyes, Bordeaux, and Rennes. Notable project references include the LA CIME biosourced multisport complex (largest climbing wall in France, Paralympic 2024 venue), the 254,000m2 FCB Five Cail BackBox brownfield requalification in Lille, and the Vachette Factory conversion to 160 housing units.
The firm's core technology is a multidisciplinary service delivery model rather than a software platform: architecture, structural and electrical engineering, energy performance, and landscape architecture are bundled under one organization to provide integrated responses from initial studies through project delivery. Specializations include biosourced materials, HQE/BBC building standards, and industrial brownfield reconversion combining heritage, urban, economic, and environmental approaches. The company has expanded via acquisition, integrating Art'Ur Architectes into the group.
5-Cinq operates a B2B professional services business model, generating project-based revenue through design studies, master planning, construction management, and project supervision. Pricing is project-specific and not publicly disclosed. Go-to-market is sales-led and direct, with projects sourced through public procurement tenders (ministries, préfectures, URSSAF, CAF, regional councils) and direct enterprise relationships. Named clients span banking (Crédit Agricole, LCL, BNP Paribas, Crédit du Nord, Kolb), government (Ministère de l'intérieur, Assemblée Nationale, SNCF Réseau), real estate developers (Nexity, Frey, Alila), retail (Darty, Yves Rocher), healthcare (Sanofi), utilities (EDF), and social housing operators. Marketing relies on portfolio display, professional referrals, LinkedIn, and Instagram rather than digital demand generation.
5-Cinq firmographics
Firmographics- Name
- 5-Cinq
- Legal name
- 5-CINQ SAS
- Website
- https://5-cinq.com
- Company type
- Private
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- 5-Cinq is a privately held French multidisciplinary architecture, engineering, and environmental consulting firm with 70+ staff across five regional offices, delivering integrated design services in housing, public facilities, brownfield rehabilitation, and tertiary buildings for government, banking, and real estate clients.
- Ownership category
- akta.pro rank
Where 5-Cinq is headquartered
LocationHeadquarters
- HQ city
- Serris
- HQ country
- France
- HQ region
- Europe
Offices5 records
Markets served
5-Cinq business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure
Revenue model
- Architecture and Engineering Services: Project-based professional services revenue from architecture, engineering, and environmental consulting services. Revenue is generated through design studies, master planning, construction management, and project supervision across residential, commercial, public facilities, and industrial rehabilitation projects.
Go-to-market motion1 record
Distribution channels2 records
Marketing channels5 records
5-Cinq product offering
Product offeringCore offering
5-Cinq is a multidisciplinary architecture, engineering, and environmental consultancy that designs, constructs, and renovates residential, commercial, public, and industrial buildings for French enterprises and government institutions. Services span the full project lifecycle from feasibility studies and master planning through construction supervision, delivered via five regional offices across France. The firm combines five expert domains—architecture, structural/electrical engineering, energy performance, landscape architecture, and urban planning—into integrated multidisciplinary responses.
Product overview
5-Cinq is a multidisciplinary architecture, engineering, and environmental consultancy firm offering integrated service offerings across three core pillars: Architecture Services, Engineering Services, and Environmental Consulting. The company operates across eight service domains including accommodation, public equipment, industrial site rehabilitation, tertiary buildings, renovation, large projects, landscapes, and urban planning. Architecture Services provides pluridisciplinary design combining architectural quality with economic, technical, and environmental considerations. Engineering Services covers electrical systems, structural engineering, and energy performance from concept through delivery. Environmental Consulting addresses sustainability across territory and city scales. The company also acquired Art'Ur Architectes to expand its capabilities. With 70+ collaborators including 21 architects, 9 engineers, and 4 landscape-urban planners, 5-Cinq delivers integrated project solutions through five geographic locations in France.
Differentiator
Problem solved
Functional benefit
Products and services
- Architecture Services
- Engineering Services
- Environmental Consulting
- Hébergement (Accommodation / Housing)
- Équipements (Public Facilities)
- Friches (Industrial Brownfield Rehabilitation)
- Tertiaires (Tertiary Buildings)
- Rénovation (Renovation)
- Grands Projets (Large-Scale Projects)
- Paysages (Landscape Design)
- Urbanisme (Urban Planning)
Quantifiable outcome
- LA CIME: Largest climbing wall in France with biosourced materials and Paralympic 2024 handisport facility
- +3 more outcomes
Companies that use 5-Cinq
Customer profileNamed customers24 records
Segments8 records
Ideal customer profiles4 records
5-Cinq technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
5-Cinq partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- Art'Ur ArchitectescoreArt'Ur Architectes has joined 5-Cinq, marking a new era for the firm. References from Art'Ur are available on www.artur.archi. This acquisition/integration strengthens 5-Cinq's architectural capabilities and expands its project portfolio.
Scale indicators2 records
Recent moves6 records
Expansion highlights5 records
5-Cinq competitors and assessment
Company assessmentDirect peers
- Valode & Pistre: Established French architecture firm delivering large-scale mixed-use, public, and corporate projects — comparable client mix and capability range, though with broader international footprint.
- Wilmotte & Associés: Paris-based architecture practice with strong institutional, cultural, and corporate client base — comparable in serving ministries, banks, and developers, with similar rehabilitation and tertiary expertise.
- Groupe-6: Grenoble-based French architecture and urban planning firm combining architecture, engineering, and landscape — comparable multidisciplinary scope serving public and institutional clients.
- Patriarche: French integrated architecture, engineering, and real estate consultancy with similar size and multidisciplinary delivery across housing, public, and tertiary buildings — directly comparable operating model.
- Groupe Kardham: French architecture, engineering, and urban planning group offering integrated design-build and consultancy services — closely comparable multidisciplinary model with similar public and private client mix.
- ANMA Architectes: French architecture and urban planning practice covering public facilities, housing, and urban regeneration — directly comparable portfolio to 5-Cinq's housing, public equipment, and Friches segments.
- Architecture-Studio: Paris-based multidisciplinary architecture firm with international reach, combining architecture, urban planning, and interior design — directly comparable service mix to 5-Cinq across housing, public facilities, and rehabilitation projects.
Broad incumbents
- setec: French engineering consultancy group with structural, mechanical, electrical, and environmental expertise — overlaps with 5-Cinq's engineering services across building and infrastructure projects.
- Artelia: Large French engineering and project management consultancy covering construction, energy, environment, and urban development — broader incumbent competing for similar public tenders and engineering scopes.
- Egis Group: Major French engineering and consulting group operating across infrastructure, buildings, energy, and urban planning — competes with 5-Cinq in public sector and energy-related engineering mandates.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks7 records
Key highlights7 records
Customer concentration
5-Cinq social profiles
Digital presence5-Cinq financial estimates
Financial estimateRevenue estimate
Valuation estimate
5-Cinq leadership team
Management profileNumber of profiles
5-Cinq subsidiaries and ownership
Company hierarchySubsidiaries1 record
5-Cinq funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
5-Cinq 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 5-Cinq
What does 5-Cinq do?
5-Cinq is a multidisciplinary architecture, engineering, and environmental consultancy that designs, constructs, and renovates residential, commercial, public, and industrial buildings for French enterprises and government institutions. Services span the full project lifecycle from feasibility studies and master planning through construction supervision, delivered via five regional offices across France. The firm combines five expert domains—architecture, structural/electrical engineering, energy performance, landscape architecture, and urban planning—into integrated multidisciplinary responses.
Is 5-Cinq a public or private company?
5-Cinq is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was 5-Cinq founded?
5-Cinq was founded in -1. It employs 51 to 100 people.
Where is 5-Cinq based?
5-Cinq is headquartered in Serris, France, in the Europe region.
How does 5-Cinq make money?
One revenue line is on record: architecture and Engineering Services.
Who are 5-Cinq's main competitors?
Direct peers on record are Valode & Pistre, Wilmotte & Associés, Groupe-6, Patriarche, Groupe Kardham, ANMA Architectes and Architecture-Studio. Broad incumbents are setec, Artelia and Egis Group.
Does 5-Cinq have an API?
No public API is recorded for 5-Cinq.