Cussac Architects and Associates

What Cussac Architects and Associates does

Cussac Architectes et Associés (CA+A) is a privately held Paris-based architecture firm specializing in collective residential housing design and project management in the Île-de-France region. Founded around 1989 by Gérard de Cussac and rebranded to its current partnership structure in 2021 when Chloé Tallis joined as an associated partner, the firm operates with approximately 30 collaborators and reports a cumulative track record of 15,000 housing units built over 35+ years. Core services span the full project lifecycle from conception through execution supervision (maître d'œuvre d'exécution), delivered through project-based professional services fees on multi-year contracts.

The firm offers two complementary service lines under a unified operation. The flagship CA+A entity handles new collective housing construction, including social housing for HLM organizations and market-rate developments for private developers. The wholly-owned subsidiary CTWA (Cussac Tallis Wagner Architectes), created in 2023 through a partnership with Hodbourg Wagner Architecture and led by Marie Wagner, addresses a growing demand for rehabilitation, restructuring, surélévation (vertical extension), and hybridization projects. Both operate from a shared Paris headquarters at 11 rue des Cinq Diamants (75013) since 2024. Technical capabilities include BIM Level 1 and Level 2 implementation and design aligned with French environmental frameworks including RE2020, NF Habitat HQE, Label Bâtiment Biosourcé, and BiodiverCity certifications. The firm has no proprietary software, AI, or digital platform products; its differentiation rests on multidisciplinary expertise in ecological sobriety, thermal performance, and urban integration.

Revenue is generated exclusively through professional services fees tied to individual projects, with publicly disclosed project values ranging from approximately €4.7M to €29M HT. The go-to-market model is enterprise field sales: direct engagement with social housing organizations (Immobilière 3F, LogiRep, Seqens, Adoma), private developers (Altarea Cogedim, Pierre Etoile/Cibex/Sodes, Nové Construction, Pierres et Lumière), and public authorities, with projects awarded through French competitive bidding processes (concours), design-build contracts (conception-réalisation), and direct negotiation. The firm is privately held by its founders with no external institutional capital and does not publicly disclose revenue figures.

Name

Cussac Architects and Associates

Legal name

Cussac Architectes et Associés

Website

https://cussac-architectes.fr

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

11–50 employees

Short description

Cussac Architectes et Associés is a Paris-based architecture firm specializing in collective housing design across Île-de-France, offering full project management from conception to execution for social housing organizations and private developers, with subsidiary CTWA dedicated to rehabilitation projects.

Ownership category

akta.pro rank

Product category

Architectural Services

NAICS

Architectural Services (541310), Architectural Services (54131), Residential Remodelers (236118)

akta.pro primary industry

Residential Design-Build & Renovation-Integrated Builders (IMAFABAE)

Keywords

• Architectural design services
• Collective housing construction
• Building rehabilitation services
• Sustainable architecture design
• Urban renewal 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. Architecture and Design Services: Project-based fees for architecture and design services, including conception, project management, and execution supervision (maître d'œuvre d'exécution) for housing developments, rehabilitation projects, and mixed-use buildings.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Cussac Architectes et Associés is a Paris-based architecture firm delivering full-service design, project management, and execution supervision for collective housing projects in Île-de-France. Through its core practice (CA+A) it designs new residential buildings for social and private developers, and through its CTWA subsidiary it provides building rehabilitation, restructuring, elevation, extension, and hybridization services. The firm integrates sustainable design, BIM-based coordination, and execution supervision across approximately 30 collaborators.

Product overview

Cussac Architectes et Associés (CA+A) operates as a unified architecture firm with two distinct service lines: CA+A handles new collective housing construction across Île-de-France (specialty: logement neuf), while CTWA (Cussac Tallis Wagner Architectes), created in 2023, is the dedicated subsidiary focused on rehabilitation, restructuring, elevation, and hybridization projects. Both operate from the Paris headquarters and share multidisciplinary teams. The firm offers complete project management from conception through execution, with environmental and sustainable design embedded across all services.

Differentiator

Problem solved

Functional benefit

Products and services

• New Collective Housing Design (CA+A) End-to-end architectural services covering conception, project management, and execution supervision for new collective housing developments. Targeted at HLM social housing organizations and private developers in the Greater Paris region, with project costs ranging from €4.7M to €29M HT and a track record of 15,000 units built over 35 years.
• Building Rehabilitation and Restructuring (CTWA) Specialized architectural services for transforming existing buildings, including EHPAD-to-social-residence conversions, office-to-housing transformations, heavy restructuring, vertical extensions (surélévation), and hybridization of programs. Delivered to social housing operators, public authorities, and private owners through CTWA, led by Marie Wagner.
• Sustainable and Environmental Architectural Design Ecological sobriety-driven architectural design incorporating bioclimatic principles, biosourced materials, energy efficiency, and compliance with French environmental frameworks including RE2020, NF Habitat HQE, Label Bâtiment Biosourcé, and BiodiverCity. Targeted at developers and public authorities seeking certified sustainable housing outcomes.
• Eco-Quarter and Mixed-Use Development Design Architectural design for eco-quarter developments and mixed-use residential projects combining housing with commercial, student, or intergenerational programs. Targeted at private developers and municipalities pursuing sustainable urban integration and program diversification.

Quantifiable outcome

• 15,000 housing units constructed in Île-de-France over 35+ years
• +1 more outcomes

Named customers8 records

Segments3 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

Three partnerships are on record, tiered core.

• Hodbourg Wagner ArchitecturecoreStrategic or Co-development Partner · 1 January 2023Partnership that led to the creation of CTWA (Cussac Tallis Wagner Architectes), a subsidiary dedicated to rehabilitation projects. Combines expertise of Cussac (new construction) with Wagner (rehabilitation) to address growing rehabilitation and hybridization needs.
• CTWA (Cussac Tallis Wagner Architectes)coreStrategic or Co-development PartnerSubsidiary created in 2023 from partnership with Hodbourg Wagner Architecture, specializing in rehabilitation, elevation, extension, and hybridization projects. Enables comprehensive service offering combining new construction and renovation expertise.
• Marie WagnercoreStrategic or Co-development PartnerArchitect and Managing Director of CTWA, bringing rehabilitation expertise to complement CA+A's new construction capabilities. Represents the historical expertise of the rehabilitation specialist from the partnership.

Scale indicators3 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• KOZ Architectes: Paris-based architecture firm with strong specialization in social and intermediate housing across Île-de-France. Directly comparable to CA+A in client base (HLMs, social developers) and sustainable housing design expertise.
• TANK Architectes: French firm with significant activity in residential, student housing, and rehabilitation projects. Comparable in scale and in the dual focus on new construction and renovation that defines CA+A and CTWA.
• Brenac & Gonzalez & Associés: Paris-based firm specializing in social and collective housing in Île-de-France with strong sustainable design credentials. Closest direct competitor in the social housing / HLM segment that CA+A serves.
• Architecture-Studio: Paris-based architecture firm of comparable scale and international reach, operating across residential, cultural, and urban projects. Directly comparable to CA+A in size, French market focus, and multidisciplinary housing expertise.
• ECDM Architectes: Paris-based firm focused on residential architecture, urban densification, and rehabilitation. Overlaps with CA+A's portfolio across HLM clients and Paris-region housing developments.
• Reichen et Robert & Associés: Established Paris-based firm specializing in social housing, urban renewal, and sustainable architecture in Île-de-France. Comparable to CA+A in project type, client base, and design philosophy.
• LAN Architecture: Paris-based firm with a strong track record in social housing, rehabilitation, and urban mixed-use projects. Comparable in scale, French focus, and dual emphasis on new construction and existing-stock transformation.
• Hamonic+Masson & Associés: Paris-based firm with deep residential and mixed-use experience in Île-de-France, including office-to-residential conversions. Comparable scale and project type overlap with CA+A's core housing mandate.
• Jourda Architectes Paris: Paris-based architecture firm with deep sustainability credentials and experience in residential, tertiary, and urban projects. Comparable to CA+A in environmental design positioning and French market focus.

Broad incumbents

• AREP: Subsidiary of Bouygues Construction, one of France's largest multidisciplinary architecture and engineering firms. Operates broadly in transport-oriented development, urban planning, and building design — overlapping with CA+A on residential and urban regeneration mandates.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/cussac-architectes-associes
• Instagraminstagram.com/cussac_architectes

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Subsidiaries1 record

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 Cussac Architects and Associates