lagneau architectes
Lagneau Architectes is a Paris-based heritage architecture firm founded in 2014 (with lineage to 1905) that specializes in restoration and rehabilitation of classified French historic monuments, serving primarily public-sector and institutional clients under the rare ACMH designation.
- Company typePrivate
- Founded2014
- HeadquartersParis, France
- Headcount—
- GTM typeB2B
- OfferingServices
What lagneau architectes does
Lagneau Architectes is a Paris-based heritage architecture practice founded in 2014 as the legal continuation of a firm whose roots extend to 1905. The firm specializes in the restoration and rehabilitation of classified historic monuments, with services spanning diagnostic studies, master planning, project management, on-site works supervision, and consulting. Its competitive positioning rests on the rare French designation of Architecte en Chef des Monuments Historiques (ACMH), currently held by senior partner Jean-François Lagneau, who also serves as President of ICOMOS France and is a former Inspector General of Historic Monuments. The partnership is completed by Xavier Lagneau and Patrice Girard.
The firm's client base is dominated by French public-sector and institutional owners, including the Ville de Paris, Centre des Monuments Nationaux (CMN), Bibliothèque nationale de France (BNF), and various ministries, alongside selected private-sector mandates such as the La Samaritaine redevelopment. Disclosed project values range from approximately €2.5M for smaller interventions to €150M for the flagship La Samaritaine mandate (2012–2019), with a recurring cluster of mid-sized engagements in the €30M–€48M range such as the Musée Lorrain and Hôtels Delasalle et de Livry.
The business model is professional-fee based, with revenue tied to long-duration public procurement contracts and percentage-of-construction fees typical of the French architecture profession. The firm has invested selectively in technical innovation, notably an aerogel-based thermoinsulating plaster introduced in 2016 to address energy performance in heritage envelopes, and has engaged in joint ventures with peer firms such as Chaix et Morel on complex adaptive-reuse mandates. There is no disclosed capital structure, external investment, or technology-platform offering; operations are concentrated in France with no evidence of international expansion.
lagneau architectes firmographics
Firmographics- Name
- lagneau architectes
- Legal name
- Lagneau Architectes
- Website
- https://lagneau-architectes.fr
- Company type
- Private
- Founded year
- 2014
- Operating status
- Operating
- Short description
- Lagneau Architectes is a Paris-based heritage architecture firm founded in 2014 (with lineage to 1905) that specializes in restoration and rehabilitation of classified French historic monuments, serving primarily public-sector and institutional clients under the rare ACMH designation.
- Ownership category
- akta.pro rank
lagneau architectes industry classification
Industry- Product category
- Heritage Architecture Services
- NAICS
- Architectural Services (54131), Commercial and Institutional Building Construction (23622)
- SIC
- General Bldg Contractors - Nonresidential Bldgs (1540)
- akta.pro primary industry
- Architectural Design Services (BPAHAKAA)
- akta.pro secondary industries
- Historic Preservation & Conservation Planning (BPAHAKAH), Architectural Reconfiguration & Structural Alterations (HSAPAEAB)
Keywords
Where lagneau architectes is headquartered
LocationHeadquarters
- HQ city
- Paris
- HQ country
- France
- HQ region
- Europe
Offices1 record
Markets served
lagneau architectes business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Marketing or Sales
Revenue model
- Architecture and Project Management Services: Complete architecture and project management services for heritage restoration, rehabilitation, and new construction projects on historic buildings. Services include diagnostic studies, feasibility studies, complete project management, and construction supervision.
- Consulting and Advisory Services: Expertise and advisory services for heritage building projects, assisting clients and fellow architects in developing and managing the historical and heritage dimension of projects during study and construction phases.
Distribution channels2 records
Marketing channels4 records
lagneau architectes product offering
Product offeringCore offering
Lagneau Architectes is a Paris-based heritage architecture firm that provides diagnostic studies, full project management (maîtrise d'oeuvre), restoration, and rehabilitation services for classified historic monuments and heritage buildings of all eras and construction methods (stone, wood, iron, reinforced concrete). The firm also offers expert advisory and consulting to public institutions, private property owners, and fellow architects on the historical and heritage dimensions of building projects from study through construction phases.
Product overview
Lagneau Architectes is a heritage architecture firm founded in 2014 by Jean-François Lagneau (Chief Architect of Historic Monuments), Xavier Lagneau (heritage architect), and Patrice Girard (architect). The firm operates as a unified service practice offering diagnostic, maîtrise d'œuvre, restoration, rehabilitation, and consulting services for historic buildings. The company traces its lineage to offices founded in 1905, making it one of France's oldest continuously operating architectural practices specializing in built heritage. Services encompass the full project lifecycle from initial diagnostics through construction execution, working on religious, civil, industrial, and military buildings across all historical periods and construction methods (stone, wood, iron, reinforced concrete). The firm collaborates with a network of specialists including economists, technical study bureaus, HQE consultants, landscape architects, scenographers, and acoustic engineers to deliver comprehensive heritage projects.
Differentiator
Problem solved
Functional benefit
Products and services
- Diagnostic and Consulting Services
- Maîtrise d'Oeuvre (Project Management)
- Monument Historique Restoration
- Building Rehabilitation and Restructuring
- Heritage Expertise and Advisory
Companies that use lagneau architectes
Customer profileNamed customers15 records
Segments3 records
Ideal customer profiles3 records
lagneau architectes technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
lagneau architectes partnerships and signals
Strategic signalPartnerships
Eight partnerships are on record, tiered notable, minor and core.
- Chaix et MorelnotableCollaboration on the restoration and rehabilitation of the Abbaye de Penthémont in Paris, a major heritage project involving complex heritage interfaces
- F. MangadonotableJoint competition participation for Musée de Cluny new visitor entrance, where Lagneau Architectes handled heritage interface management
- Nicolas LaisnéminorJoint participation in Musée de Cluny competition alongside F. Mangado as lead architect
- Network of Specialist PartnerscoreOngoing relationships with economists, technical engineering firms, HQE consultants, landscape architects, scenographers, and acoustic specialists to provide comprehensive project capabilities
- Christian ZomenominorCollaboration with Nancy-based architect for CCI de Nancy renovation project
- Thierry DeleforgeminorCollaboration with designer for Institut d'Etudes Avancées project at Hôtel de Lauzun in Paris
- Christian KereznotableCompetition partnership for Musée Lorrain renovation, where Lagneau Architectes provided heritage interface expertise
- Dominique PerraultnotableCollaboration on Poste du Louvre restructuring project, working on heritage zones within the larger project
Scale indicators4 records
Recent moves7 records
Expansion highlights4 records
lagneau architectes competitors and assessment
Company assessmentDirect peers
- AIA Associés: French architecture firm with comparable cultural and heritage restoration portfolio, including museums and classified monuments. Direct competitor in public heritage competitions.
- Chaix et Morel: Paris-based architecture firm specializing in cultural, heritage, and public-building projects. Partnered with Lagneau Architectes on the Abbaye de Penthémont restoration, competing in the same heritage-architecture competition pool.
- Dominique Perrault Architecture: Paris-headquartered practice led by Dominique Perrault; collaborates with Lagneau Architectes on heritage zones within larger commissions (e.g., Poste du Louvre). Operates at the intersection of contemporary architecture and historic-monument restoration.
- Christiane Schmuckle-Mollard, ACMH: Predecessor firm of co-founder Patrice Girard. A fellow Architecte en Chef des Monuments Historiques practice with a directly overlapping client base of classified-monument restoration projects.
- Studio Milou Architecture: Paris-based practice specializing in restoration of historic monuments and cultural institutions. Competes in the same Architecte en Chef des Monuments Historiques ecosystem.
- Bernard Desmoulin Architecte: French heritage architect working on classified monuments including Musée Carnavalet and Grand Palais restorations. Comparable in scope of high-profile cultural-heritage commissions.
Emerging players
- Atelier Christian Kerez: Swiss architect firm partnering with Lagneau on the Musée Lorrain competition. Comparable in competing for high-profile heritage museum renovations across Europe.
- François Mangado Architectes: Spanish architect-led practice partnering with Lagneau Architectes on the Musée de Cluny visitor entrance competition. Comparable in specializing in cultural and heritage architecture.
Others
- OPPIC (Opérateur du Patrimoine et des Projets Immobiliers de la Culture): French public agency acting as project owner for cultural-heritage construction; a key client of Lagneau Architectes (BNF Salle Labrouste). Comparable as the institutional counterparty shaping heritage project pipelines.
- ICOMOS France: International Council on Monuments and Sites, French national committee; Jean-François Lagneau serves as President. Industry body governing heritage preservation standards applicable to Lagneau's practice.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks5 records
Key highlights7 records
Customer concentration
lagneau architectes social profiles
Digital presencelagneau architectes financial estimates
Financial estimateRevenue estimate
Valuation estimate
lagneau architectes leadership team
Management profileNumber of profiles
Profiles1 record
lagneau architectes funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
lagneau architectes M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about lagneau architectes
What does lagneau architectes do?
Lagneau Architectes is a Paris-based heritage architecture firm that provides diagnostic studies, full project management (maîtrise d'oeuvre), restoration, and rehabilitation services for classified historic monuments and heritage buildings of all eras and construction methods (stone, wood, iron, reinforced concrete). The firm also offers expert advisory and consulting to public institutions, private property owners, and fellow architects on the historical and heritage dimensions of building projects from study through construction phases.
Is lagneau architectes a public or private company?
lagneau architectes is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was lagneau architectes founded?
lagneau architectes was founded in 2014.
Where is lagneau architectes based?
lagneau architectes is headquartered in Paris, France, in the Europe region.
How does lagneau architectes make money?
Two revenue lines are on record. Architecture and Project Management Services are the primary driver. The others are consulting and Advisory Services.
Who are lagneau architectes's main competitors?
Direct peers on record are AIA Associés, Chaix et Morel, Dominique Perrault Architecture, Christiane Schmuckle-Mollard, ACMH, Studio Milou Architecture and Bernard Desmoulin Architecte. Emerging players are Atelier Christian Kerez and François Mangado Architectes. Others are OPPIC (Opérateur du Patrimoine et des Projets Immobiliers de la Culture) and ICOMOS France.
Does lagneau architectes have an API?
No public API is recorded for lagneau architectes.
What industry is lagneau architectes in?
lagneau architectes's product category is Heritage Architecture Services. Its primary akta.pro industry code is BPAHAKAA, Architectural Design Services, with a secondary code of BPAHAKAH, Historic Preservation & Conservation Planning. Its NAICS code is 54131 and its SIC code is 1540.