Ithaques

What Ithaques does

Ithaques is a Paris-based architecture atelier founded in 1991 by Anna Bogdan as a SARL under French law, specializing in the rehabilitation of social housing and the urban renewal of dysfunctional post-war housing estates in occupied sites. The firm delivers the full architectural mission — from diagnostic (DIAG) and programming through conception-réalisation design and site supervision (OPC) — and is differentiated by its dual expertise in architecture and urbanism, combined with deep sensitivity to 20th-century modernist heritage. Its core technical capabilities include occupied-site heavy rehabilitation using phased "opération tiroir" strategies, systematic urban dysfunction diagnosis across urban/architectural/heritage/social/environmental dimensions, and pursuit of BBC Effinergie Rénovation, NF Habitat HQE, Patrimoine Habitat, and Plan Climat Ville de Paris certifications. The seven-person atelier (co-founders Bogdan and Danyel Thiébbaud plus five architects) operates alongside partner firm WRA under the "Ithaques + WRA" sub-brand, sharing offices at 30 Allée Vivaldi in Paris's 12th arrondissement.

The firm's revenue model is professional services-based: it wins mandates via competitive public procurement (marchés publics, concours) and direct negotiation with French social housing offices (bailleurs sociaux), municipal governments, and public development agencies. Project-level operation budgets disclosed range from €2.3M HT to €37.9M HT, with architectural fees negotiated per mandate (typically 8–12% of project cost) and contracts structured as multi-year missions. The customer base is exclusively B2G, spanning at least nine distinct institutional clients (Antin Habitat, RIVP, Versailles Habitat, Immobilière 3F, ICF La Sablière, Logéo Seine Estuaire, Seine-Saint-Denis Habitat, CA Évry Centre Essonne), with the portfolio addressing over 4,500 housing units across 13+ projects. The geographic footprint is concentrated in Île-de-France (Paris, Hauts-de-Seine, Seine-Saint-Denis, Essonne, Yvelines) with selective extensions to Normandie (Lillebonne) and the Lyon metropolitan area (Vaulx-en-Velin). The firm has no disclosed funding, no institutional investors, and operates as a founder-led private practice with registered capital of €7,622.45.

Name

Ithaques

Legal name

ITHAQUES

Website

https://ithaques.fr

Company type

Private

Founded year

1991

Operating status

Operating

Headcount range

1–10 employees

Short description

Ithaques is a Paris-based architecture atelier founded in 1991 that delivers full architectural services — diagnostic, design, and site supervision — for occupied-site social housing rehabilitation and urban renewal projects for French public housing offices, municipalities, and public development agencies.

Ownership category

akta.pro rank

Product category

Architectural Services

NAICS

Architectural Services (541310), Residential Building Construction (2361)

SIC

Services-To Dwellings & Other Buildings (7340)

akta.pro primary industry

Residential Luxury / High-End Home Construction (IMAFABAJ)

akta.pro secondary industry

Luxury Whole-Home Renovation (High-End Finishes & Custom Build) (HSAPAEAI)

Keywords

• Urban renewal architecture
• Social housing rehabilitation
• Thermal renovation services
• Architectural design services
• Public infrastructure design

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. Architectural Design Services: ITHAQUES generates revenue through professional architectural service contracts with public and social housing clients. Services include complete missions (mission complète), programming, diagnostics (DIAG), and site supervision (OPC) across rehabilitation, restructuring, and urban renewal projects. Revenue is project-based, with individual project budgets ranging from €2.3M to €37.9M HT.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels3 records

Core offering

Ithaques is an architectural firm providing urban renewal, occupied-site social housing rehabilitation, thermal renovation, and public infrastructure design services. The practice delivers master planning, building design, and project management for French social landlords (offices publics de l'habitat), local and metropolitan governments, and public developers, with budgets historically ranging from about €2.3M to €37.9M (HT).

Product overview

Ithaques is a Paris-based architecture atelier specializing in urban renewal, architectural rehabilitation, and sustainable development. The firm operates as a single-service practice focused on architecture and urban planning projects, primarily working on social housing rehabilitation, thermal renovation, and public infrastructure projects throughout the Île-de-France region. The portfolio consists of distinct project-based service offerings organized around rehabilitation in occupied sites, urban renewal operations, and new construction, with each project representing a complete architectural engagement from design through completion.

Differentiator

Problem solved

Functional benefit

Brands

• Ithaques + WRA: Joint architecture practice formed when WRA joined Ithaques in 2015, specializing in timber construction and mixed-use programs.

Products and services

• Social housing rehabilitation and thermal renovation (maîtrise d'œuvre) Architectural design and project management service for the heavy rehabilitation and thermal renovation of existing social housing buildings, typically executed while tenants remain in occupation. Delivered for French public social landlords such as Antin Habitat, RIVP, Versailles Habitat, and Vallogis, with project budgets historically ranging from approximately €2.3M to €37.9M HT.
• Urban renewal master planning for ANRU programs Master planning and architectural coordination service for national urban renewal programs (ANRU), covering neighborhood restructuring, public-space redesign, and the integration of rehabilitated and new-build housing. Delivered for metropolitan authorities and public developers in cities such as Paris, Villeurbanne, and Lyon (La Duchère).
• Public infrastructure design (STEP Seine Aval - SIAAP) Architectural design and project management service for the extension of the STEP Seine Aval wastewater treatment plant, delivered for SIAAP (the public sanitation authority of the Paris region). Combines industrial infrastructure architecture with integration into the existing urban and landscape context.
• La Fresque - student housing construction (RIVP) New-build architectural service for a student housing project delivered for RIVP (Régie Immobilière de la Ville de Paris), located in Paris. Includes design of the residential building and its integration into the surrounding neighborhood.
• CDG - restructuring project (RIVP) Architectural restructuring service for an RIVP-owned residential building, including reconfiguration of housing units and improvement of building performance.
• Acacias - housing rehabilitation (Versailles Habitat) Architectural rehabilitation service for a Versailles Habitat social housing operation in Versailles, addressing building condition and energy performance.
• Sans-Souci - housing rehabilitation (Vallogis) Architectural rehabilitation service for the Sans-Souci social housing operation owned by Vallogis, covering building envelope, shared spaces, and housing unit upgrades.
• Street Pix - housing rehabilitation (Antin Habitat) Architectural rehabilitation service for an Antin Habitat social housing operation, delivered within the firm's ongoing program of occupied-site rehabilitation work for repeat clients.
• Le Clairval - thermal rehabilitation (Antin Habitat) Thermal renovation and architectural rehabilitation service for the Le Clairval social housing operation owned by Antin Habitat, targeting building energy performance and envelope upgrades.
• Les Noirettes & Grand Bois - housing rehabilitation (Métropole de Lyon / Villeurbanne) Architectural rehabilitation service for the Les Noirettes and Grand Bois social housing operations in Villeurbanne, delivered as part of the ANRU urban renewal program for the Métropole de Lyon.
• Bernard de Jussieu - housing rehabilitation (Paris) Architectural rehabilitation service for a Paris social housing operation, addressing building condition, energy performance, and tenant-occupied works staging.
• Gros Chênes - heavy rehabilitation (Antin Habitat) Heavy architectural rehabilitation service for the Gros Chênes social housing operation owned by Antin Habitat, addressing envelope, structure, and housing unit upgrades in an occupied setting.
• Claude Monet - housing restructuring (Versailles Habitat) Architectural restructuring service for the Claude Monet social housing operation owned by Versailles Habitat, including reconfiguration of housing units and shared spaces.
• Bat. Building - urban renewal / densification project Architectural service for an urban renewal and densification project, delivered within Ithaques's broader portfolio of city-scale renewal mandates.
• Tolbiac - housing rehabilitation (RIVP) Architectural rehabilitation service for an RIVP-owned social housing operation in the Tolbiac area of Paris, targeting building condition, energy performance, and shared-space upgrades.
• Square Surcouf - public space (City of Paris) Architectural and urban design service for the Square Surcouf public space project commissioned by the City of Paris, addressing landscape, circulation, and integration with surrounding residential fabric.

Quantifiable outcome

• Gros Chênes thermal rehabilitation aims to reduce energy consumption by 50%, bringing buildings below 150 kWh/m².year in primary energy
• +2 more outcomes

Named customers9 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Four partnerships are on record, tiered core and minor.

• WRA (Wild Rabbits Architecture)coreStrategic or Co-development Partner · 1 January 2015WRA architecture practice joined ITHAQUES in the 12th arrondissement of Paris in 2015. The partnership originated from a first collaborative project — a student residence in Versailles in timber structure on existing infrastructure — and deepened into an ongoing strategic alliance. WRA brings expertise in timber construction and mixed-use programs. The two firms share offices and collaborate on projects including Bat. Building (Paris 17), Gros Chênes (Chaville), Street Pix (Paris 10), Le Clairval (Lillebonne), and Noirettes & Grand Bois (Vaulx-en-Velin).
• Associated Architects on Various ProjectsminorStrategic or Co-development PartnerITHAQUES frequently collaborates with architect and landscape architecture partners on project-specific teams: AWP (architecte et paysagiste) on STEP Evry; MAARU (architecte-urbaniste) on Square Surcouf; WRA + Atelier 127 + BBC & Associés on Noirettes & Grand Bois; Vincent Lavergne on Bernard de Jussieu.
• Engineering and Consultancy Firms (BETOM, SCOPING, MECOBAT, CITINEA, NORTEC, etc.)minorImplementation/ SI/ Consulting PartnerITHAQUES works consistently with a network of engineering firms (BETOM, SCOPING, MECOBAT, CITINÉA, NORTEC, GTM BÂTIMENT) for structural, MEP, and environmental consulting across its project portfolio. These firms serve as BET (bureaux d'études techniques) on individual projects, acting as subcontractors to ITHAQUES's architectural mandate.
• CAUE Île-de-France (Conseil d'Architecture, d'Urbanisme et de l'Environnement)minorOthersITHAQUES featured in a published interview (entretien) by CAUE Île-de-France in 2020, discussing Vladimir Doray and Danyel Thiébaud's work — indicating a professional relationship and platform for architectural discourse.

Scale indicators3 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• Atelier Roland Schweitzer: Paris-based architecture and urban planning practice specializing in social housing and urban renewal, including heritage-sensitive modernization of 20th-century housing estates. Highly comparable in project typology and client base to Ithaques.
• ANMA (Agence Nicolas Michelin & Associés): Paris-based architecture and urban planning firm with deep involvement in French urban renewal, social housing, and public-space projects. Directly comparable on public-sector housing rehabilitation and urban regeneration mandates.
• TVK: Paris-based architecture and urban planning practice working on metropolitan-scale urban renewal, housing, and public space. Comparable to Ithaques in integrating architectural design with broader urban-scale public-sector interventions.
• ECDM Architectes: Paris-based firm known for social housing rehabilitation, urban renewal operations, and large-scale public commissions in France. Directly comparable to Ithaques on occupied-site rehabs and public-sector client relationships.
• Hamonic+Masson & Associés: Paris-based architecture firm with strong portfolio in urban renewal, social housing transformation, and public infrastructure. Comparable on project typology and on the kind of public-sector procurement competitions Ithaques targets.
• Lacaton & Vassal: Paris-based architecture firm (2021 Pritzker Prize laureate) renowned for the rehabilitation and transformation of social housing stock, often in occupied conditions. Closely comparable to Ithaques in focus on post-war housing renewal, low-income resident retention, and emphasis on additive rather than demolitive interventions.
• PietriArchitectes: Paris and Marseille-based architecture firm engaged in urban renewal and housing rehabilitation projects across France, including social housing. Comparable to Ithaques in practice focus and Mediterranean/Île-de-France client base.

Regional players

• COBE Architects: Copenhagen-based architecture and urban design firm known for large-scale housing, public space, and adaptive reuse projects across Northern Europe. Comparable to Ithaques on urban regeneration, social housing typology, and emphasis on sustainable rehabilitation, though operating in a different geography.

Emerging players

• TANK Architectes: French architecture practice with portfolio in social and sustainable housing, urban renewal, and rehabilitation of modernist housing stock. Comparable to Ithaques in scale and focus on contemporary social housing interventions.

Broad incumbents

• Architecture-Studio: Large Paris-based international architecture practice with broad portfolio spanning cultural, housing, and urban projects. Comparable as a major French firm competing for the same public-sector commissions and large-scale rehabilitation mandates that Ithaques targets.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/Ithaques
• LinkedInlinkedin.com/company/ithaques

Compliance11 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 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 Ithaques