fabien gantois architectures

What fabien gantois architectures does

Atelier d'Architectures Fabien Gantois (aaFG) is an 8-person Paris-based architectural practice founded and led by Fabien Gantois (Gérant, architecte DPLG) alongside Agency Director Agnès Poline (architecte DPLG), with six named collaborators (François Bassaler, Mehdi Benlaldj, Natalia Czepulkowska, Valentin Hamon, Léa Hollier-Larousse, Lucie Lelion). The firm specializes in the maintenance, adaptation, repair, and transformation of existing built spaces, organized around five service categories — Entretenir (Maintain), Transformer (Transform), Compléter (Complete), Réparer (Repair), and Adapter (Adapt). Its technical differentiator is a heritage-sensitive design methodology anchored on the principles "primum non nocere" (first, do no harm) and full reversibility of interventions, treating each site context as the starting point for scenario-based dialogue with clients, engineering teams, and users rather than imposing preconceived schemes.

The practice serves three primary segments: French museums and cultural institutions (notably the Musée du Louvre across at least five commissions including the Lions Door entrance, temporary exhibition spaces, reception area, Donatello Gallery, and Rothschild reserves; plus the Musée du Quai Branly Théâtre de Verdure adaptation), social housing organizations (OPH Paris Habitat for the Potain 258-unit rehabilitation and Toit et Joie for the Tanger 71-unit rehabilitation), and a small set of private residential clients (Pantin apartment conversion, Ermont house extension). Project scale ranges from €80,000 HT for a 112 m² apartment to €16M HT for a 258-unit social-housing rehabilitation, with multi-year commissioning cycles.

Revenue is generated through professional services fees on individually commissioned projects, with project-specific pricing tied to scope, surface area, and complexity. The firm operates a direct-to-client model with no disclosed marketing channels, relying on reputation and professional networks. Geographic reach is primarily the Paris metropolitan area, with one disclosed international project in Tangier, Morocco. Delivery is enabled through a recurring ecosystem of engineering partners (BE.BATITECH as core partner across Louvre programs, plus IN4, GREENTA, ILAO, KHEPHREN, Espace Temps, and BMI), allowing the small in-house team to deliver institutional-scale commissions. The firm is founder-owned, privately held, with no disclosed external investors or parent company.

Name

fabien gantois architectures

Legal name

Atelier d'Architectures Fabien Gantois

Website

https://aafg.eu

Company type

Private

Operating status

Operating

Headcount range

1–10 employees

Short description

Fabien Gantois Architectures (aaFG) is an 8-person Paris-based architectural practice specializing in the maintenance, adaptation, repair, and transformation of existing built heritage for museums, social housing organizations, and private residential clients.

Ownership category

akta.pro rank

Product category

Architectural Services

NAICS

Architectural Services (54131), Architectural Services (541310), Architectural, Engineering, and Related Services (5413)

akta.pro primary industry

Architectural Design Services (BPAHAKAA)

akta.pro secondary industry

Architectural Reconfiguration & Structural Alterations (HSAPAEAB)

Keywords

• Heritage architecture services
• Architectural renovation design
• Building rehabilitation services
• Museum interior design
• Social housing refurbishment

Headquarters

HQ city

Paris

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Others

Revenue model

1. Architectural Services: Professional architectural services for heritage restoration, renovation, adaptation, and transformation projects. Projects are commissioned on an individual basis with fees based on project scope, surface area, and complexity. Revenue derived from professional services contracts with museums, social housing organizations, and private clients.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Core offering

Atelier d'Architectures Fabien Gantois (aaFG) is a Paris-based architectural practice providing professional design services for the maintenance, adaptation, repair, transformation, and completion of existing built spaces. The firm delivers heritage-sensitive architecture for cultural institutions (notably the Musée du Louvre and Musée du Quai Branly), large-scale social housing rehabilitations, and private residential commissions, applying a context-driven, reversible, and collaborative design methodology.

Product overview

Atelier d'Architectures Fabien Gantois (aaFG) is an architecture firm offering a unified portfolio of architectural services organized around five core disciplines: Entretenir (Maintenance), Transformer (Transform), Compléter (Complete), Réparer (Repair), and Adapter (Adapt). The practice specializes in the care of existing built heritage, with a focus on heritage buildings and cultural institutions, particularly the Louvre Museum. Their project portfolio spans large-scale housing rehabilitation (Potain with 258 units, Tanger with 71 units), museum projects (Louvre reception redesigns, temporary exhibition spaces, Rothschild storage facilities, Donatello Gallery), and private residential work (apartment conversions, house extensions). The firm emphasizes a collaborative approach with clients, engineering teams, and users, integrating ecological ambition with respect for heritage and contemporary needs.

Differentiator

Problem solved

Functional benefit

Products and services

• Architecture and Heritage Preservation Services

Quantifiable outcome

• 258 housing units rehabilitated to meet Paris Climate Plan targets for carbon neutrality by 2050
• +2 more outcomes

Named customers6 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

Eight partnerships are on record, tiered core and minor.

• BE. BATITECHcoreImplementation/ SI/ Consulting Partner · 1 January 2025BET CFO/CFA (electrical engineering) partner for the Louvre Donatello Gallery redesign project, providing electrical installation and fire detection systems expertise.
• BE.BATITECHcoreImplementation/ SI/ Consulting Partner · 1 January 2024Main engineering partner for multiple Louvre museum projects including temporary exhibition spaces improvement, reception renovation, and Lions Door redesign. Provides comprehensive building engineering services.
• ILAOminorImplementation/ SI/ Consulting Partner · 1 January 2024Engineering partner for the Louvre temporary exhibition spaces improvement project, providing specialized technical expertise for the metal-and-timber lens installation.
• KHEPHRENminorImplementation/ SI/ Consulting Partner · 1 January 2024Engineering partner for the Louvre temporary exhibition spaces improvement project, contributing specialized expertise for the 8.5m diameter self-supporting metal-and-timber lens closing the Rotunda.
• IN4coreImplementation/ SI/ Consulting Partner · 1 January 2023BET structure and economist partner for the Tanger housing rehabilitation project, providing structural engineering and economic analysis for the 71-unit climate adaptation project.
• GREENTAcoreImplementation/ SI/ Consulting Partner · 1 January 2023BET fluides (fluid/mechanical engineering) partner for the Tanger housing rehabilitation, providing expertise in thermal comfort and climate adaptation solutions.
• Espace TempsminorImplementation/ SI/ Consulting Partner · 1 January 2020BET fluides (fluid engineering) partner for the Louvre Rothschild reserves project, providing specialized expertise in building services engineering for the fine timber enclosure design.
• BMIminorImplementation/ SI/ Consulting Partner · 1 January 2020BET structure (structural engineering) partner for the Louvre Rothschild reserves project, providing structural engineering expertise for the mezzanine space transformation.

Scale indicators3 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• Agence Wilmotte & Associés: Paris-based architecture firm with strong cultural-institution and heritage renovation portfolio including museums and historic monuments. Comparable to AAFG in operating from a similar French architecture boutique model with Louvre-class clients.
• Tryptique Architecture: French architecture practice specializing in contextual interventions, residential conversions, and small-scale heritage-sensitive projects. Direct peer in the boutique heritage/transformation segment of the French market.
• Atelier Filippini: Paris-based heritage and restoration architecture practice specializing in historic monument conservation. Closely comparable niche peer to AAFG in French heritage restoration and adaptive reuse.
• Barto+Chouet Architecture: French architecture studio focused on residential renovation, contextual interventions, and small-scale heritage-aware projects. Direct peer in the French boutique renovation/transformation segment.

Broad incumbents

• Dominique Perrault Architecture: Established French architecture firm with major cultural-institution commissions and adaptive reuse projects. Broader and larger incumbent in the same heritage-sensitive French institutional architecture space as AAFG.
• Architecture-Studio: Large Paris-headquartered architecture firm with a broad cultural, heritage, and urban-regeneration portfolio. Operates at much larger scale but overlaps with AAFG in French institutional and heritage-sensitive architecture.
• ANMA (Agence Nicolas Michelin & Associés): Larger French architecture firm with public-sector, social housing, and urban regeneration projects. Overlaps with AAFG in heritage-sensitive social-housing rehabilitation but operates at materially larger scale.
• Agence Jean-Paul Viguier: Major Paris architecture firm with significant cultural-institution and urban regeneration portfolio. Broader incumbent in French institutional architecture adjacent to AAFG's heritage museum niche.

Emerging players

• Studio Gang: Internationally recognized architecture firm known for sustainability-led adaptive reuse and contextual design. Comparable to AAFG in design philosophy emphasizing integration with existing context and ecological ambition.
• Carlo Ratti Associati: Turin- and Boston-based design practice with strong portfolio in adaptive reuse, climate-responsive architecture, and cultural-institution work. Comparable to AAFG in focus on existing-building transformation with sustainability lens.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

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 fabien gantois architectures