Groupe CISN

What Groupe CISN does

Groupe CISN is a cooperative real estate group (Société Anonyme Coopérative d'Intérêt Collectif pour l'Accession à la Propriété, or SACICAP) founded in 1930 in Saint-Nazaire, France, operating under the PROCIVIS national cooperative network. The group is structured around four core business lines: CISN Promotion Immobilière (new-build property development, producing 450 dwellings per year); CISN Agence Immobilière (property sales and rentals through a network of five physical agencies in Trignac, Nantes, La Baule, and Saint-Nazaire); CISN Syndic (co-ownership management for ~75 condominium associations); and CISN Résidences Locatives (social housing rental, managing approximately 5,200 units). Customer segments include social housing tenants, first-time buyers (70% of promotions are primary residences), intergenerational cohabitation programs, property investors, and co-ownership associations. Revenue is generated through a mix of one-time development sales, recurring rental and management fees, and transaction commissions, with FY2025 projected revenue of €63M.

The group's core technology centres on off-site construction (construction hors-site) achieving 65% prefabrication rates and 8-month assembly delays, bioclimatic passive design, and a biobased material stack (wood, hemp, straw, earth). It has achieved E3 C1 / Energie + Carbone standard, RE2028 compliance, and Passivhaus performance levels on projects such as Origine (Saint-Nazaire) and Kenkiz (Guérande). Notable partnerships include Chantiers de l'Atlantique (naval engineering know-how), EDEIS (engineering certification), Banque des Territoires (project financing), Akajoule (decarbonation consultancy), and Bpifrance (Accélérateur Solutions Industrie du Futur). The group has 140 employees and is governed by a cooperative structure that reinvests profits locally into social missions rather than distributing to shareholders.

The group is pursuing a 2050 decarbonation strategy formalised through the November 2025 creation of a Direction des Transitions Écologiques and the March 2026 ACT charter signature with Bpifrance covering 24 decarbonation projects. Three projects (Puissance 4 in Trignac, Pirmil-Les-Iles in Rezé, L'Azuré Bongraine in Aytré) have been labelled Démonstrateurs de la Ville Durable under the France 2030 program. Geographic expansion has begun beyond Loire-Atlantique into Nouvelle-Aquitaine via the 800-unit L'Azuré eco-district project. New product lines include intergenerational residences (Les Jardins de l'Hippodrome, Andrée Rochefort) and building elevation pilots (Le Pouliguen) enabling densification without land artificialization.

Name

Groupe CISN

Legal name

Société Anonyme Coopérative d'Intérêt Collectif pour l'Accession à la Propriété (SACICAP) de Saint-Nazaire et de la Région des Pays de la Loire

Website

https://cisn.immo

Company type

Private

Founded year

1930

Operating status

Operating

Headcount range

51–100 employees

Short description

Groupe CISN is a French cooperative real estate group (SACICAP) founded in 1930, operating across Loire-Atlantique in social housing rentals (5,200 units), property development (450 dwellings/year), real estate agency, and co-ownership management, serving tenants, first-time buyers, and municipal partners.

Ownership category

akta.pro rank

Product category

Social and Affordable Housing (Cooperative Real Estate)

NAICS

Other Residential Care Facilities (623990), Continuing Care Retirement Communities and Assisted Living Facilities for the Elderly (6233)

SIC

Services-To Dwellings & Other Buildings (7340), Services-Membership Organizations (8600)

akta.pro primary industry

Cooperative (Co-op) Housing Association Management (BPAJAHAC)

akta.pro secondary industries

Condominium Association Management (BPAJAHAA), Affordable Housing & Community Development (Housing, Community Land Trusts) (BPAGALAC)

Keywords

• Social housing management
• Real estate development
• Property management services
• Cooperative housing operator
• Affordable homeownership programs

Headquarters

HQ city

Trignac

HQ country

France

HQ region

Europe

Offices5 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Social Housing (Habitat Social): Management of approximately 5,200 social housing units. Rental housing for households meeting income criteria. Services include rental management, tenant relations, and property maintenance.
2. Real Estate Development (Promotion Immobilière): New construction programs for residential properties sold to purchasers. Includes accession libre (market rate), accession sociale (social access with subsidies like PSLA), and ANRU affordable housing. 450 dwellings constructed per year.
3. Real Estate Agency (Agence Immobilière): Property sales and rentals for existing properties. Services include property valuation, buyer/seller matching, and rental intermediation.
4. Property Management (Administration de Biens - Syndic): Condominium management services for approximately 75 co-ownership properties. Financial management, maintenance coordination, and administrative services.
5. Service Residences: Management of rental residences including EHPAD (nursing homes) and youth residences. Supports independent living and intergenerational cohabitation programs.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels8 records

Core offering

Groupe CISN is a cooperative real estate group that develops, manages, and operates housing across its full lifecycle in the Loire-Atlantique region of France. The group delivers new construction programs through CISN Promotion Immobilière, real estate transactions (sales and rentals) through CISN Agence Immobilière, condominium management through CISN Syndic, and social housing rental services (approximately 5,200 units) through CISN Résidences Locatives. Its offering combines market-rate, social, and affordable housing with innovative off-site and low-carbon construction methods.

Product overview

Groupe CISN is a cooperative real estate group (SACICAP — Société Anonyme Coopérative d'Intérêt Collectif pour l'Accession à la Propriété) operating since 1930, organized around four complementary business lines: CISN Promotion Immobilière (property development), CISN Agence Immobilière (estate agency), CISN Syndic (co-ownership property management), and CISN Résidences Locatives (social housing rentals). The group serves tenants, first-time buyers, large families, people in precarity or disability situations, investors, and main-residence purchasers across Loire-Atlantique, with a strategic 2050 roadmap focused on decarbonation, biosourced materials, off-site construction, and intergenerational housing. The group also operates a network of physical agency branches in Trignac (headquarters), Nantes (Decré and Boulevard des Anglais), La Baule, and Saint-Nazaire.

Differentiator

Problem solved

Functional benefit

Products and services

• CISN Promotion Immobilière Property development division handling new construction programs for residential properties sold to purchasers. Includes accession libre (market rate), accession sociale (social access with subsidies like PSLA), and ANRU affordable housing, with 450 dwellings constructed per year. Targets first-time buyers, families, and investors in the Loire-Atlantique and Pays de la Loire regions.
• CISN Agence Immobilière Real estate agency offering residential property sales and rentals (existing/new), including property valuation services for clients seeking to buy, sell, or rent. Operates through physical agency branches across Nantes, La Baule, Saint-Nazaire, and Trignac.
• CISN Syndic (Administration de Biens) Property management and co-ownership administration services managing a portfolio of approximately 75 co-owned residences, handling accounting, maintenance coordination, and legal compliance for condominium communities in Loire-Atlantique.
• CISN Résidences Locatives Social housing rental division managing approximately 5,200 rental units across Loire-Atlantique for income-eligible households. Services include rental management, tenant relations, property maintenance, EHPAD nursing home residences, youth residences, and intergenerational cohabitation programs.

Quantifiable outcome

• Dwellings constructed: 450 per year
• +4 more outcomes

Named customers3 records

Segments5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Ten partnerships are on record, tiered core, major, flagship and minor.

• Côt'âgecoreStrategic or Co-development Partner · 20 May 2026Association promoting intergenerational cohabitation between seniors and young people. CISN Résidences Locatives signed partnership convention to develop Cohabitation Intergénérationnelle Solidaire, matching seniors with spare rooms to young people seeking affordable housing.
• Gabrielle & LéocoreStrategic or Co-development Partner · 20 May 2026Association facilitating intergenerational housing solutions. Partnership with CISN Résidences Locatives to connect young people with seniors offering housing in their homes.
• AkajoulemajorStrategic or Co-development Partner · 1 January 2026Energy and sustainability consultancy partnering with CISN for fleet decarbonation strategy and electric vehicle transition planning for the 140-employee organization.
• ProcivisflagshipStrategic or Co-development PartnerNational cooperative housing network providing strategic support, brand backing, and shared services to member organizations like Groupe CISN.
• SONADEVmajorStrategic or Co-development PartnerUrban development company partnering with CISN on mixed residential projects including Natura program at Saint-André-des-Eaux where land was made available for social and affordable housing.
• Chantiers de l'AtlantiquemajorStrategic or Co-development PartnerNaval shipyard providing industrial expertise for off-site construction techniques. Their manufacturing know-how inspired prefabrication methods used in Puissance 4 project.
• Saint-Nazaire AgglomérationcoreStrategic or Co-development PartnerLocal government authority partnering on Puissance 4 off-site construction project and co-ownership renovation subsidy programs offering up to 12,000€ per dwelling.
• Galeries Lafayette Foundation / Fondation Saint Jean de DieumajorStrategic or Co-development PartnerPartnership for inclusive housing development. Andrée Rochefort residence at Pouliguen combines autonomous living with inclusive housing for 15 autonomy units, 6 inclusive units, and 2 social units.
• Nantes Métropole AménagementmajorStrategic or Co-development PartnerUrban development agency partnering on Basse Ile-Pirmil Les Iles project in Rezé, part of the Démonstrateurs de la Ville Durable initiative.
• UP FactorminorStrategic or Co-development PartnerTechnical partner providing diagnostic assessment for building elevation projects to add housing units without land artificialization.

Scale indicators9 records

Recent moves13 records

Expansion highlights6 records

Direct peers

• Vilogia: Major regional social housing operator (ESH) with operations across northern France managing ~90,000 units. Similar to CISN as a regional social landlord offering diversified housing services including rental management, development, and syndic.
• ICF Habitat: Subsidiary of SNCF group providing social and intermediate housing across France (~100,000 units). Comparable as a regional-to-national social housing operator with development, rental, and property management services.
• Erilia: Mid-sized French social housing operator (ESH) managing ~85,000 units in southern and eastern France. Closely comparable to CISN as a regionally-anchored social landlord offering rental, accession, and property management services.
• Foncia: France's largest property management and syndic operator. Comparable to CISN Syndic as a co-ownership management and rental administration service provider, though at national scale versus CISN's ~75 properties.

Broad incumbents

• Procivis: National cooperative housing network and parent organization of Groupe CISN. Procivis coordinates multiple regional SACICAPs across France and provides strategic support, shared services, and brand backing — directly comparable as both parent and peer cooperative operator.
• Immobilière 3F: Major French social housing operator managing over 300,000 units as part of the Action Logement group. Comparable as a large-scale social landlord with similar missions of affordable rental housing and community development.
• CDC Habitat: France's largest social housing operator (state-owned, Caisse des Dépôts subsidiary) managing over 500,000 units nationwide. Directly comparable as a major social housing provider offering rental, intermediated, and affordable homeownership across the country.
• Nexity: France's largest private real estate developer offering residential development, property management, and agency services. Comparable as a multi-specialist housing operator, though at significantly larger scale and with for-profit orientation.

Regional players

• Allier Habitat: Regional French social housing operator based in the Allier department managing ~13,000 units. Comparable as a small-to-mid sized SACICAP-style operator providing social rental, development, and property management in a defined regional territory.
• Atlantique Habitations: Local Loire-Atlantique social housing operator and partnership collaborator with CISN (per Le Pouliguen elevation project). Directly comparable as a regional HLM operator in the same geographic territory with similar social housing and community development focus.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/GroupeCISN
• YouTubeyoutube.com/channel/UCcA756KwVjyilmma3bEfNKw
• Facebookfacebook.com/Groupecisn
• LinkedInlinkedin.com/company/groupecisnatlantique
• Instagraminstagram.com/groupecisn

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries4 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Groupe CISN