What Soletdev does

Soletdev is a French advisory agency specializing in solidarity-based real estate and urban development, founded in 2017 and headquartered in Saint-Germain-en-Laye with additional offices in Paris and a registered office in Le Mesnil-le-Roi. The firm operates as a SARL under private, founder-led ownership by Jérôme Flot (Architecte DPLG, 20+ years experience) alongside three associates: Sacha Lorand, Domitille Chaigne, and Jeanne Murawiec, all architects/urbanists with training from ENSA Versailles, Paris-Belleville, Paris La Villette, and Sciences Po Paris. The firm delivers three integrated service modules — Montage d'opérations (hybrid project structuring), Programmation & Prospective (programming and use prefiguration), and Études & Chantier (operational support through delivery) — across the full urban production chain.

Soletdev serves public, private, and social economy clients across the French solidarity real estate sector, including social housing providers (Domofrance, Batigère Habitats Solidaires, OPAL, ICF La Sablière, Elogie-Siemp, RIVP), emergency accommodation and social integration operators (France Horizon, Emmaüs, Armée du Salut/FNDSA, ADEF), public institutions and metropolitan authorities (Préfecture Île-de-France, DRIHL, Métropole du Grand Lyon, Paris & Métropole Aménagement, Grand Paris Aménagement, Cénovia, SADEV 94), and ISR/ESS investors (Foncière ETIC, Foncière de la Ville de Paris, ANRU co-investment fund, Novaxia, Nexity Non Profit). The firm has delivered 60+ references since 2017 spanning emergency accommodation (CHU), social residences, pension de famille, student housing, third places, transitional urbanism, habitat intercalaire, and urban regeneration projects with values ranging from €700K to €37M HT.

The business model is project-based professional services: Soletdev operates as a sales-led consultancy winning mandates through direct advisory engagements, ecosystem referrals, and participation in public tenders and consultations. Pricing is not publicly disclosed; engagements are negotiated directly with institutional clients on a mission-by-mission basis. The firm cultivates an extensive partner ecosystem (Plateau Urbain, moonarchitectures, Marielle Grossson, Dominique Perrault Architecture, Socotec, JPS Contrôle, The Street Society, Collectif MU, La Belle Friche, Les Saprophytes, Fabrice Bougon, among others) to mobilize specialized expertise per mission. Marketing channels include LinkedIn thought-leadership (the 'Décryptage' series), academic engagements at ENSA Paris-Belleville and ENSAPL Lille, and participation in conferences (Groupe ESPI, Pavillon de l'Arsenal, Eiffage, Construction21, and international seminars in Barcelona, Brussels, and Strasbourg). Geographic focus is France-wide with concentration in Île-de-France, Nouvelle-Aquitaine, Auvergne-Rhône-Alpes, and Hauts-de-France, plus overseas engagements in Guyane and Mayotte.

Name

Soletdev

Legal name

Soletdev

Website

https://soletdev.fr

Company type

Private

Founded year

2017

Operating status

Operating

Headcount range

1–10 employees

Short description

Soletdev is a French advisory firm founded in 2017 that provides project mounting, programming, and construction oversight for solidarity-based real estate and urban development, serving public institutions, social housing providers, NGOs, and ISR investors across France.

Ownership category

akta.pro rank

Headquarters

HQ city

Saint-Germain-en-Laye

HQ country

France

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Professional Consulting Services: Soletdev generates revenue through fees for consulting and advisory services in real estate development, including project mounting (montage d'opérations), programming, technical/economic studies, and construction oversight for social housing, emergency accommodation, and solidarity economy projects.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Soletdev is a French consulting agency (agence de conseil) specializing in solidarity-based real estate and urban planning. The firm advises public and private project owners, ISR investors, ESS organizations, and end-users across the full urban and real estate production chain, delivering project mounting (montage d'opérations), programming and prospective studies (programmation et prospective), and operational support from upstream commissioning to building exploitation (études et chantier). Services are tailored to each project's social, technical, financial, legal, and administrative realities, including hybrid financing structures, off-site construction, and transitional urbanism approaches.

Product overview

Soletdev is a consulting agency specializing in solidarity-based real estate and urban planning. Founded in 2017, the company operates across the entire urban and real estate production chain to ensure operational implementation of projects. Their offering consists of three integrated service modules: Montage d'opérations (project structuring and alternative financing), Programmation & Prospective (programming and future studies), and Études & Chantier (studies and construction supervision). They work with public, private, and social economy investors across socially and ecologically focused projects.

Differentiator

Problem solved

Functional benefit

Products and services

• Montage d'opérations

Quantifiable outcome

• Successfully delivered 60+ references across social housing, emergency accommodation, ESS third places, and urban regeneration projects since 2017
• +1 more outcomes

Named customers12 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

27 partnerships are on record, tiered core and major.

• Plateau UrbaincoreStrategic or Co-development PartnerPlateau Urbain is a recurring strategic partner appearing across multiple Soletdev projects, particularly in transitional urbanism and temporary occupation strategies. Key collaborations include urban transient habitat strategy for the Métropole Européenne de Lille, occupations temporaires with Grand Lyon Métropole, and Les Grandes Voisines perpetuation in Lyon. The partnership focuses on activating vacant spaces and developing social temporary housing solutions.
• RIVP (Régie Immobilière de la Ville de Paris)coreImplementation/ SI/ Consulting PartnerRIVP is a key client-partner commissioning Soletdev for multiple high-profile projects in Paris including the ZAC Saint-Vincent de Paul socles, Halle Turenne, ZAC Gare des Mines (Lots N4 and S5), and the Émile Anthoine project. RIVP is the sole investor for major urban regeneration projects in Paris.
• moonarchitecturescoreStrategic or Co-development Partnermoonarchitectures is a key architectural partner in numerous Soletdev projects including Halte 24 Périgueux (CHU in off-site construction), Boulevard Barbes (temporary emergency accommodation), Le 210 third place, Residence Étudiante Cuffies (OPAL), and Noisy-le-Grand CHU. The partnership covers both temporary and permanent social housing projects.
• Marielle GrossmannmajorImplementation/ SI/ Consulting PartnerMarielle Grossmann is a recurring partner for Soletdev on off-site construction projects, providing specialized expertise in modular and off-site housing development. Collaborations include OPAL student residence in Cuffies/Soissons (200 units), FAM/MAS Laon (€10M project), and Pas-de-Calais Habitat innovative housing (Arras and Frévent).
• Paris & Métropole Aménagement (P&MA)coreStrategic or Co-development PartnerP&MA is the urban development authority driving major Paris-area projects where Soletdev provides programming and mounting expertise. Key projects include ZAC Gare des Mines (multiple lots), Saint-Vincent de Paul, and Station MU perpetuation. P&MA manages large-scale urban transformation projects in the Paris metropolitan area.
• ICF La SablièremajorImplementation/ SI/ Consulting PartnerICF La Sablière is a social housing company and subsidiary of ICF Habitat, partnering with Soletdev on Lot S5 of ZAC Gare des Mines where ICF is developing a Young Workers' Residence (Foyer jeunes travailleurs) of 53 units managed by Hénéo.
• SocotecmajorImplementation/ SI/ Consulting PartnerSocotec appears as a technical control office (bureau de contrôle) partner on multiple projects including ADAMAL (Salon-de-Provence), Sauvegarde de l'Adolescence (Paris), Le 210 third place (Paris 2e), and the TOTEM PUCA project in Guyane and Mayotte.
• The Street SocietymajorStrategic or Co-development PartnerThe Street Society partnered with Soletdev on the ZAC Saint-Vincent de Paul socles project with RIVP, providing expertise in programming and spatial configuration for active bases in the future eco-district. Also collaborated on the Émile Anthoine project.
• OPALmajorImplementation/ SI/ Consulting PartnerOPAL (bailleur de l'Aisne) partnered with Soletdev on multiple projects: student residence in Cuffies/Soissons (200 units, €16.5M), FAM/MAS at Laon (€10M), affordable housing with BRS at Laon, and the Maison judiciaire de transition in Saint-Quentin (€1.7M). OPAL is a key social housing partner in the Hauts-de-France region.
• Emmaüs FrancemajorStrategic or Co-development PartnerEmmaüs France supported Soletdev's work with Emmaüs Montbéliard (30 housing units for companions) and Emmaüs 82 (strategic real estate plan for La Ville-Dieu-du-Temple). Partnerships with Emmaüs structures focus on developing housing solutions for companions and vulnerable populations.
• Grand Lyon MétropolemajorStrategic or Co-development PartnerGrand Lyon Métropole partnered with Soletdev on a multi-year framework agreement for temporary occupations with social vocation, including habitat intercalaire strategy and the Maison de l'Hospitalité third-place prefiguration project. The partnership addresses homelessness and housing precarity across the Lyon metropolitan territory.
• Batigère Habitats SolidairescoreImplementation/ SI/ Consulting PartnerBatigère Habitats Solidaires is a recurring client-partner for Soletdev across multiple projects including Rosny-sous-Bois (169-unit residence), Boulevard Barbes emergency shelter (138 places), Saint-Germain-en-Laye office transformation (collaboration with Quadral), and housing for vulnerable women (Villepinte, 40 units).
• Domine Perrault ArchitecturemajorStrategic or Co-development PartnerDominique Perrault Architecture led the architectural team for the Quartier de Demain competition at Pessac Saige, with Soletdev providing programming and financial structuring for the mixed-use urban requalification of a social housing tower (R+18) with 7,500 m² SDP.
• DRIHL (Direction Régionale et Interdépartementale de l'Hébergement et du Logement)majorImplementation/ SI/ Consulting PartnerDRIHL partnered with Soletdev on multiple Île-de-France emergency accommodation projects including the AMI temporary modular housing consultation (150 units), office-to-CHU transformation studies, and the Boulevard Barbes project. DRIHL is the regional housing and accommodation authority.
• Fabrice Bougon (Économiste)majorImplementation/ SI/ Consulting PartnerFabrice Bougon is an economist partner on two major ZAC Gare des Mines projects: Lot N4 (€37M, 11,000 m² SDP) and Lot S5 (€21M) with RIVP. Provides economic modeling and financial structuring for complex mixed-use urban projects.
• JPS ContrôlemajorImplementation/ SI/ Consulting PartnerJPS Contrôle is a technical control office (bureau de contrôle) appearing on multiple projects with Soletdev including ADAMAL (Salon-de-Provence), Emmaüs 82 (La Ville-Dieu-du-Temple), Lot N4 and Lot S5 at ZAC Gare des Mines. Provides technical compliance and safety oversight for construction projects.
• La Belle FrichemajorImplementation/ SI/ Consulting PartnerLa Belle Friche led the AMU group (mandataire) for the ZAC des Musiciens project in Bagneux, with Soletdev providing user programming and activation expertise. The collaboration focuses on participatory strategies and temporary occupation of vacant spaces within the urban renewal perimeter.
• Les SaprophytesmajorImplementation/ SI/ Consulting PartnerLes Saprophytes partnered with Soletdev and Plateau Urbain on multiple projects including urban transient habitat strategy for MEL (Métropole Européenne de Lille) and the Tiers-lieu des transitions solidaires et alimentaires for Communauté Urbaine de Dunkerque.
• HénéomajorImplementation/ SI/ Consulting PartnerHénéo manages student housing and youth worker residences at ZAC Gare des Mines (Lot S5: 145 student units, 53 youth worker units) and partnered with Soletdev on the Requalification Porte Brancion project (sport and inclusion equipment) for RIVP.
• Collectif MUcoreStrategic or Co-development PartnerCollectif MU is a key partner for Soletdev on the ZAC Gare des Mines project, where the Station MU cultural venue (2,250 m² SDP) is being perpetuated as a permanent third place. Soletdev supported programming, economic modeling, and negotiations with P&MA and Ville de Paris. The collaboration also extends to Lot N4 where Station MU is integrated into the mixed program.
• Elogie-SiempmajorImplementation/ SI/ Consulting PartnerElogie-Siemp is a social housing company (Office Public de l'Habitat de Paris) acting as delegated project owner (MOA déléguée) for Lot S5 of ZAC Gare des Mines, developing an active base (commerces and activities) and 145 student housing units managed by Hénéo. Soletdev provides AMO services on the project.
• ADEF (Association pour le Développement des Foyers)majorImplementation/ SI/ Consulting PartnerADEF partnered with Soletdev through Solideo on the temporary relocation of migrant workers' residence (275 units) in Saint-Ouen-sur-Seine in preparation for the 2024 Olympic Village. Soletdev also currently supports ADEF in developing a strategy for the reuse/rehoming of the modular residence created for this project.
• Nexity Non ProfitmajorImplementation/ SI/ Consulting PartnerNexity Non Profit partnered with Soletdev on the Mérignac Bon Air project (housing and solidarity center for women and children, 2,000 m² SDP) and the Halte 24 Périgueux CHU (via SYNONIM, Nexity's solidarity vehicle). Both projects demonstrate innovative social housing solutions.
• La SolideomajorImplementation/ SI/ Consulting PartnerLa Solideo (Olympic Delivery Corporation) partnered with Soletdev on the temporary migrant workers' residence ADEF (275 units, Saint-Ouen) for the 2024 Olympic Village and continues to engage Soletdev in defining the reuse strategy for the modular residence.
• SADEV 94majorImplementation/ SI/ Consulting PartnerSADEV 94 is the development authority for the ZAC des Musiciens in Bagneux, where Soletdev provides programming and activation expertise within the 6-year framework agreement led by La Belle Friche. The project targets a QPV (Priority Urban Policy) neighborhood benefiting from metro expansion.
• GIP EPAUmajorImplementation/ SI/ Consulting PartnerGIP EPAU led the international Quartier de Demain consultation, selecting Soletdev and the Perrault-MBL team for the Sablons neighborhood transformation in Le Mans. The agency supports urban development and planning projects in the public interest.
• NovaxiamajorImplementation/ SI/ Consulting PartnerNovaxia is the developer for the Hôtel Dieu project in Paris (Laureate 2019), a 20,000 m² SDP urban redevelopment combining social, economic, and health programs. Soletdev handled programming and mounting for the temporary occupation phase (5,000 m² SDP) to prefigure permanent uses.

Scale indicators1 record

Recent moves5 records

Expansion highlights4 records

Emerging players

• Bellastock: Bellastock is a French architecture and research collective focused on circular construction, reuse of materials, and experimental building approaches. It intersects with Soletdev's off-site and innovative construction agenda for social housing and represents an emerging player in sustainable social real estate advisory and prototyping.

Direct peers

• APUR (Atelier Parisien d'Urbanisme): APUR is the urban planning research and consultancy bureau for the City of Paris, producing urban studies, programming briefs, and strategic analyses on Paris real estate. It serves some of the same institutional clients (RIVP, Ville de Paris) and overlaps with Soletdev on programming and feasibility work for Paris-area social real estate projects.
• Urbanis: Urbanis is a French urban planning and social housing consultancy that provides advisory, programming, and project structuring for social landlords and public authorities. It directly competes with Soletdev on programming, feasibility, and operational support for social housing and urban renewal projects across France.
• Atelier Philippe Madec: Atelier Philippe Madec is a French architecture and urban planning practice known for its socially and ecologically oriented urban projects. It operates as both architect and urbanist advisor on social housing and third-place projects — closely aligned with Soletdev's positioning at the intersection of architecture, urban planning, and solidarity real estate.
• Plateau Urbain: Plateau Urbain is a French cooperative specializing in temporary occupation of vacant urban spaces, often for ESS uses. As a recurring Soletdev partner on transitional urbanism mandates, it operates in an adjacent but overlapping niche and is the closest direct comparator on the temporary occupation and habitat intercalaire service line.
• Sémaphores: Sémaphores is a French consulting firm specializing in the social and solidarity economy (ESS), real estate strategy, and impact advisory. It serves a similar mix of associations, public actors, and ISR investors as Soletdev, with overlapping service lines in real estate strategy and project structuring for solidarity-based operations.
• Architecture Studio: Architecture Studio is a major French architecture and urban planning firm with extensive work on social housing, mixed-use developments, and large-scale urban regeneration. While broader in scope than Soletdev, it competes on integrated programming and architectural missions for institutional social real estate clients in France and internationally.

Others

• ANRU (Agence Nationale pour la Rénovation Urbaine): ANRU is the French national agency that funds and coordinates urban renewal programs in priority neighborhoods (QPV). It is both a Soletdev funder (via its co-investment fund) and a major commissioner of the kind of programming, mounting, and feasibility advisory services Soletdev provides.
• Foncière Étic: Foncière Étic is a French real estate investment company specializing in socially responsible investment (ISR) in third places, social housing, and ESS real estate. As a recurring Soletdev financial partner, it represents the investor side of the same ecosystem and serves overlapping ESS clients.

Broad incumbents

• Nexity (Non Profit arm): Nexity is France's largest real estate developer, with a dedicated Non Profit / solidarity arm (via vehicles like SYNONIM) that develops social housing, emergency accommodation, and solidarity residences. It is a recurring Soletdev partner on social housing mandates and a much larger incumbent offering integrated development, financing, and operator services.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/soletdev

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 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 Soletdev