What CITALLIOS does

CITALLIOS is a Société d'Économie Mixte (SEM) headquartered in Nanterre, France, operating as an 'Ensemblier urbain' — an integrated urban development assembler — serving municipalities, départements, EPTs, and the Région Île-de-France. Founded in 2016 from the merger of four regional SEMs (SARRY 78, Yvelines Aménagement, SEMERCLI, SEM 92), the group now spans three entities: the parent CITALLIOS SEM for urban development concessions, CITALLIA (SPL, created 2022 with Départements of Yvelines and Hauts-de-Seine) for agile direct-to-government work without competitive tendering, and CITALLIOS Promotion (wholly-owned SAS, created 2020 with €8M capital) for real estate co-promotion.

The group delivers six integrated service lines: public urban development (concessions and private initiatives), private housing and historic center renovation, public equipment construction and AMO (assistance to project owner), urban and real estate strategy consulting, real estate promotion (including BRS / Bail Réel Solidaire), and private-initiative development. The underlying technology is professional services and project management rather than software or platforms — there is no disclosed AI/ML capability, API, or proprietary digital product. Operations are backed by a capital base of €24.3M and equity of €32.2M as of 31 December 2023, with access to long-term financing from Caisse des Dépôts / Banque des Territoires and land portage from EPFIF.

The business model is B2G-only. Revenue is generated through urban development concessions (land development, property commercialization, infrastructure delivery), delegated project management and AMO mandates (professional services), and real estate transaction fees via CITALLIOS Promotion. Pricing is non-commercial, set through public procurement frameworks and concession agreements. The customer base is structurally concentrated in French public-sector entities, with 26 collectivités holding equity stakes in CITALLIA, creating dual-role shareholder/client relationships. The firm has been profitable annually since 2021 and holds 7 EcoQuartier labels and 6 'Quartiers innovants et écologiques' designations.

Name

CITALLIOS

Legal name

CITALLIOS - Société Anonyme d'Économie Mixte

Website

https://citallios.fr

Company type

Private

Founded year

2016

Operating status

Operating

Headcount range

51–100 employees

Short description

CITALLIOS is a French public-private urban development company (SEM) headquartered in Nanterre that delivers urban renewal, public equipment, housing renovation, and real estate promotion services to municipalities and territorial authorities across Île-de-France through its SEM, SPL, and Promotion subsidiaries.

Ownership category

akta.pro rank

Headquarters

HQ city

Nanterre

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Urban development concessions: Operates as a Société d'Économie Mixte (SEM) conducting urban development concessions for municipalities and territorial authorities. Revenue generated through land development, property commercialization, and public infrastructure delivery.
2. Maitrise d'ouvrage and AMO services: Provides delegated project management and assistance to project owner services for public buildings and equipment construction/renovation.
3. Real estate promotion: CITALLIOS Promotion (SAS subsidiary) participates in real estate development projects as a co-developer, securing project exits and ensuring quality alignment with public objectives.

Go-to-market motion2 records

Distribution channels2 records

Marketing channels4 records

Core offering

CITALLIOS is a Société d'Économie Mixte (SEM) providing urban development and planning services for municipalities and territorial authorities in the Île-de-France region. The group operates three entities (CITALLIOS SEM, CITALLIA SPL, CITALLIOS Promotion SAS) delivering public urban development concessions, private housing and historic center renovation, public equipment construction, urban/land/real estate strategy consulting, and real estate co-promotion across the entire urban development value chain.

Product overview

CITALLIOS operates as a unified group of three entities providing urban development services across the entire value chain: CITALLIOS (SEM) as the core public-private urban development company, CITALLIA (SPL) as an agile public local subsidiary for direct government work, and CITALLIOS Promotion as a real estate development arm. Together they offer six integrated service lines: public urban development operations (Aménagement public), private housing and historic center renovation (Habitat privé – Centres anciens), public equipment construction (Équipements publics), urban and real estate strategy consulting (Stratégie urbaines, foncières et immobilières), real estate development (Promotion immobilière), and private initiative development (Aménagement d'initiative privée). The group serves elected officials and institutional landowners across Île-de-France, operating in both public concession frameworks and private/mixed arrangements.

Differentiator

Problem solved

Functional benefit

Products and services

• CITALLIOS SEM (Urban Development Concessions) Core Société d'Économie Mixte (SEM) entity founded in 2016 delivering public space development, housing renovation, public equipment construction, and real estate strategy services for municipalities and territorial authorities in the Yvelines and Hauts-de-Seine departments.
• CITALLIA SPL (Public Local Company) Société Publique Locale (SPL) subsidiary created in 2022 by the Departments of Yvelines and Hauts-de-Seine, providing agile urban development services directly to local governments, allowing in-house procurement without public tender.
• CITALLIOS Promotion (Real Estate Co-Development) Wholly-owned SAS subsidiary created in 2020 with €8M capital, focused on securing real estate development outcomes and ensuring quality in property programs delivered on CITALLIOS and CITALLIA operations.
• Aménagement public (Public Development Operations) Public urban development operations conducted via concession agreements or private initiatives, including land acquisition, infrastructure construction (roads, public spaces, parks), demolition, and pollution remediation.
• Habitat privé – Centres anciens (Private Housing – Historic Centers) Private housing renovation services for historic city centers, including property restoration operations (ORI), programmed housing improvement (OPAH/OPAH-RU), and slum clearance.
• Équipements publics (Public Equipment Construction) Construction, renovation, and restructuring of public buildings and facilities including schools, libraries, sports centers, and administrative buildings under mandate or AMO (assistance to project owner) arrangements.
• Stratégie urbaines, foncières et immobilières (Urban, Land and Real Estate Strategy) Strategic consulting services for urban development, land valorization, and real estate optimization, advising elected officials and institutional landowners on sustainable development strategies.
• Promotion immobilière (Real Estate Development) Real estate development services including property co-promotion, land banking, and BRS (Bail Réel Solidaire) programs developed with the Office Foncier Solidaire des Yvelines.
• Aménagement d'initiative privée (Private Initiative Development) Urban development services on private land, working with major private landowners to transform sites in alignment with territorial planning objectives without public concession contracts.

Quantifiable outcome

• 7 operations labeled 'EcoQuartiers'
• +2 more outcomes

Named customers8 records

Segments1 record

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Six partnerships are on record, tiered core and minor.

• EPFIF (Établissement Public Foncier d'Île-de-France)coreStrategic or Co-development PartnerLong-standing strategic partner for land holding and foncier portage in urban development operations. EPFIF acquires and holds land on behalf of projects before transfer to CITALLIOS for development.
• CAUE 78 et 92 (Conseils d'Architecture, d'Urbanisme et de l'Environnement)coreStrategic or Co-development PartnerPartnership with departmental advisory bodies for architecture, urban planning, and environment providing expertise to territorial development projects.
• SIPPERECminorStrategic or Co-development PartnerSyndicate partner providing infrastructure and equipment expertise for Paris-region public developments.
• Seine & Yvelines EnvironnementminorStrategic or Co-development PartnerEnvironmental expertise partner for sustainable development initiatives.
• Various developer partners (Bouygues Immobilier, Cogedim, Emerige, Ogic, Icade, etc.)coreChannel Partner/ Reseller/ DistributorSelected through competitive tender processes for real estate development within urban zones. Participate as developers building housing, offices, and commercial space on developed land parcels.
• Social housing providers (I3F, ADOMA, 1001 Vies Habitat, INLI, etc.)coreStrategic or Co-development PartnerSocial landlords partnering on urban renewal projects to deliver social and intermediate housing components.

Scale indicators7 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• Nexity: France's largest listed real estate developer covering residential, commercial, and urban regeneration. Comparable in urban operations and public-sector partnerships (ANRU social-housing renewals), though broader asset scope and predominantly private capital structure.
• Altarea: Listed French real estate group covering retail, residential, and urban project development (including mixed-use ZAC-type operations). Comparable in mixed-use urban development activity but at national scale and without SEM-style public-private shareholder base.
• Linkcity (Bouygues Construction): Bouygues group's dedicated urban and real estate development subsidiary, operating in property development including large urban regeneration projects across France. Comparable end-product (real estate and mixed-use urban operations) but with private financing and corporate parent backing.
• Eiffage Aménagement: Private urban development subsidiary of Eiffage group operating across France. Comparable as a developer of ZAC, mixed-use, and brownfield projects, but backed by a large private construction group rather than public shareholder structure.
• Icade: Listed French real estate company focusing on commercial property, housing, and urban renewal. Comparable in urban real estate development activity and in serving public-sector clients, but operates at much larger scale across more asset classes.

Direct peers

• Grand Paris Aménagement: State-owned EPIC (Établissement Public à caractère Industriel et Commercial) acting as the primary urban development operator for the Métropole du Grand Paris. Like CITALLIOS, it delivers concessions, AMO, and land development across Île-de-France — a directly comparable public-affiliated aménageur operating in the same geography.
• SADEV 94: Société d'Économie Mixte in Val-de-Marne (Île-de-France) operating as a public-private urban developer carrying urban concessions, housing renewal, and public equipment projects. Closest structural analog to CITALLIOS: same SEM legal form, same département-level scope, same client base of municipal/intercommunal shareholders.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@Citallios
• LinkedInfr.linkedin.com/company/citallios

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Subsidiaries2 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 CITALLIOS