What Atelier Choiseul does

Atelier Choiseul is a Paris-based architecture and urban planning firm (SARL d'architecture, founded 2006, capital €30,000) operating as a 7-person boutique practice led by co-managing partners Florence Crépu Houdy and Guillaume Lelasseux. The firm operates a dual-discipline model combining architecture and urbanism, delivering social housing rehabilitation, urban renewal studies, public equipment construction, and master planning for French public-sector clients. Its work is anchored in the ANRU/NPNRU public funding frameworks — the National Program for Urban Renewal — with cumulatively 120 urban studies and 2,730 social housing units rehabilitated or in progress since inception. Projects span occupied-site energy rehabilitation, residentialization, eco-neighborhood master planning, and public facility construction (schools, gymnasiums, university buildings, communal facilities).

The firm uses Building Information Modeling (BIM) and digital maquette across 100% of projects, with Guillaume Lelasseux serving as dedicated BIM Manager. Technology and process differentiation are reinforced by achievement of BBC Effinergie, RT2012, HQE, E+C-, and NF Habitat HQE certifications across multiple housing and public facility projects. The firm's competitive positioning is built on dual architecture-urbanism expertise, fluency with French public procurement frameworks, and ability to deliver energy-efficient rehabilitation in occupied settings without relocating residents.

Atelier Choiseul generates revenue exclusively through French public procurement (concours d'architecture and marchés publics), with fee-for-service professional engagements. The client base includes social housing operators (Immobilière 3F, Valloire Habitat, OPH de Drancy, Habitat Social Français, SNI/Groupe SNI, Le Foyer Rémois), municipalities and inter-municipal authorities (Drancy, Reims, Poissy, Saint-Germain-en-Laye, Metz Métropole), public territorial establishments (EPT Grand-Orly Seine Bièvre, CA Val Parisis, EPFIF), and educational institutions (Université Paris IV La Sorbonne, HEC Paris via CCI Paris). Geographic operations are concentrated across Île-de-France, Grand Est, Centre-Val de Loire, Bourgogne-Franche-Comté, and Auvergne-Rhône-Alpes — all domestic French markets. No external investors, parent company, or subsidiaries are indicated; the firm is founder-owned.

Name

Atelier Choiseul

Legal name

ATELIER CHOISEUL

Website

https://atelierchoiseul.com

Company type

Private

Founded year

2006

Operating status

Operating

Headcount range

1–10 employees

Short description

Atelier Choiseul is a 7-person Paris-based architecture and urban planning firm founded in 2006, delivering social housing rehabilitation, urban renewal studies, and public facility construction for French municipalities, social housing operators, and educational institutions under ANRU/NPNRU public procurement.

Ownership category

akta.pro rank

Product category

Architectural Services

NAICS

Architectural Services (54131)

akta.pro primary industry

Urban Planning & Master Planning (BPAHAKAD)

Keywords

• Architectural services
• Urban planning
• Social housing rehabilitation
• Urban renewal projects
• Public sector architecture

Headquarters

HQ city

Paris

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Professional Services – Architecture and Urban Planning: Fee-for-service professional services for architecture and urban planning projects. Revenue is generated through public procurement competitions and direct commissions from public sector clients. Projects range from urban studies to full architectural design and construction oversight.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Atelier Choiseul is a Paris-based architecture and urban planning firm delivering architectural design, urban studies, social housing rehabilitation, and public equipment (schools, gymnasiums, etc.) construction services. The firm specializes in occupied-site social housing rehabilitation (réhabilitation en site occupé) and operates within the ANRU/NPNRU national urban renewal frameworks. All projects are conducted using BIM methodology.

Product overview

Atelier Choiseul is an architecture and urban planning firm offering two core service lines: Architecture and Urban Planning. The Architecture practice covers new construction and rehabilitation projects for housing, schools, and public facilities. The Urban Planning practice includes urban renewal studies, master planning, and urban requalification projects. Key offerings include social housing rehabilitation, public equipment construction, and ANRU urban renewal projects. The firm works primarily with public sector clients including municipalities, social housing organizations, and government agencies.

Differentiator

Problem solved

Functional benefit

Products and services

• Architectural Design Services Core architectural design services for new construction and rehabilitation of public buildings (schools, gymnasiums, community facilities), delivered to French municipalities, inter-municipalities, and public institutions.
• Social Housing Rehabilitation (Réhabilitation en site occupé) Rehabilitation services for existing social housing stock delivered while tenants remain in place (site occupé), targeting French social housing operators (bailleurs sociaux) and ANRU/NPNRU program stakeholders.
• Urban Planning Studies (Études urbaines) Urban planning and feasibility studies for municipalities and public institutions, supporting local planning decisions and urban strategy development.
• Urban Renewal Projects (ANRU / NPNRU) Architecture and urban planning services executed under the French national urban renewal programs (ANRU / NPNRU), supporting comprehensive neighborhood revitalization in partnership with municipalities and social housing operators.

Quantifiable outcome

• 2,730 social housing units rehabilitated or in progress (1,450 delivered, 800 in construction, 480 in study)
• +3 more outcomes

Named customers10 records

Segments4 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

Seven partnerships are on record, tiered notable and core.

• CitalliosnotableImplementation/ SI/ Consulting PartnerPublic land and development entity (Établissement Public d'Aménagement) acting as project coordinator and legal/fiscal advisor on urban renewal projects. Citallios serves as mandataire on several urban studies including the RD14 plan guide and Sannois town center reconfiguration.
• IngéropnotableImplementation/ SI/ Consulting PartnerEngineering consultancy (BET tous corps d'état) providing technical studies on building and infrastructure projects. Partnered on the Wiesberg housing rehabilitation (Forbach), Orgeval NPNRU (Reims), and military quarter reconversion projects.
• Atelier Frédérique GarniernotableTechnology or IntegrationLandscape architecture firm collaborating on urban studies and landscape design. Worked with Atelier Choiseul on Montmorency strategic urban study and residentialization projects.
• SAREMM (Société d'Aménagement et de Restauration de Metz Métropole)coreStrategic or Co-development PartnerMetropolitan development company for Metz. Mandated partner for the 120-hectare ZAC du Parc du Technopôle urban development project, one of Atelier Choiseul's most significant long-term engagements.
• EPT Grand-Orty Seine Bièvre (Etablissement Public Territorial 12)coreStrategic or Co-development PartnerPublic territorial authority managing renewal projects for L'Haÿ-les-Roses and Villejuif. Atelier Choiseul provides urban planning assistance on NPNRU projects across 320 hectares within the Grand Paris development context.
• CA Val Parisis / EPFIFcoreStrategic or Co-development PartnerAgglomeration community and Public Land Development Institution of Île-de-France collaborating on urban studies including the Primevères activity park in Pierrelaye and strategic studies for the Beauregards/Chênes sectors in Herblay.
• Valloire HabitatcoreStrategic or Co-development PartnerSocial housing operator (bailleur social) for the Loiret department, managing the major NPRU regional project at Les Chaises quarter in Saint-Jean-de-la-Ruelle — one of the most ambitious rehabilitation projects at 281 units, 20 M€ HT.

Scale indicators3 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• Atelier Roland Schweitzer: Paris-based architecture and urban planning firm specializing in urban renewal, eco-districts, and public-sector master planning. Closely aligned on the architecture + urban planning dual discipline and public procurement focus.
• ECDM Architectes: French architecture firm active in housing, urban renewal, and public facilities, with strong BIM adoption. Comparable in scale, public-client mix, and contemporary French social housing focus.
• Atelier du Pont: French architecture firm with strong credentials in housing, urban renewal, and sustainable construction. Comparable on energy-focused residential projects and contemporary French public architecture.
• Architecture-Studio: Major French architecture and urbanism firm with a dual architecture + urban planning offer, public-sector client base, and substantial international portfolio. Closely comparable to Atelier Choiseul's integrated architecture and urban planning model and public-client focus.
• Hamonic+Masson & Associés: French architecture firm with strong credentials in social housing, urban renewal, and rehabilitation of occupied sites, often working with social housing operators. Comparable mix of residential rehabilitation, public clients, and urban regeneration work.
• TANK Architectes: French architecture firm deeply engaged in social housing, energy rehabilitation, and urban renewal projects, including ANRU programs. Highly comparable on energy retrofit expertise and public client base.
• Atelier d'Architecture Pierre Parat: French architecture firm with significant social housing and urban renewal portfolio, especially in Île-de-France. Comparable on social housing rehabilitation and public-sector procurement.
• Architecture Patrick Mauger: French architecture firm with extensive social housing and urban regeneration experience, particularly in the Paris region. Comparable on social housing rehabilitation and public procurement profile.

Broad incumbents

• Wilmotte & Associés: Major French architecture firm with broad public and private portfolio, including housing, urban planning, and cultural projects. Comparable in French public-sector architecture, but at significantly larger scale and broader scope.

Regional players

• Dietmar Feichtinger Architectes: French-based architecture firm with strong public-sector portfolio including housing, schools, and urban projects. Comparable on public-sector architecture and urban integration, though with a different geographic footprint within France.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/atelier-choiseul

Compliance8 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 Atelier Choiseul