ECB Williot

What ECB Williot does

ECB Williot (legal name: ECB Williot & fils) is a family-owned French general construction company (PME familiale) founded in September 1990 by Jean-Pierre Williot and headquartered in Sannois, Val-d'Oise, in the Île-de-France region. The firm provides building construction, renovation, rehabilitation, and maintenance services for public-sector and corporate clients, operating as an entreprise générale that coordinates multiple artisan trades under a single point of contact. Its offerings span new construction, structural rehabilitation, interior fit-out, and after-sales maintenance, with project sizes ranging from approximately €140,000 to €2.7 million.

The company is organized into two operating units: ECB Williot handles general construction including structural studies, new build, and renovation, while 2ABTP, a wholly-owned carpentry and woodworking subsidiary created in the late 1990s and managed by H. Rousseau, provides in-house workshop fabrication and on-site finishing installation for general contracting projects. This vertical integration into menuiserie is a distinguishing structural feature. The firm holds QUALIBAT certification and documents a portfolio of 20+ project attestations across Île-de-France municipalities and corporate clients including Ville de Paris, Air France, TF1, Veolia Eau, and Schlumberger.

The business model is project-based contracting with custom quotes per engagement, targeting primarily French municipal governments (primary segment) and large corporations (secondary segment). Revenue is approximately €9 million annually supported by 45 employees, distributed across direct field sales and government public-works tendering. The firm is currently led by Bernard Williot as Gérant (second-generation family management). There is no institutional investor or PE backing, and geographic operations remain concentrated within the Île-de-France region.

Name

ECB Williot

Legal name

ECB Williot & fils

Website

https://ecb-williot.fr

Company type

Private

Founded year

1990

Operating status

Operating

Short description

ECB Williot & fils is a family-owned French general construction company in Sannois (Île-de-France) providing building construction, renovation, rehabilitation, and maintenance services for municipal governments and corporate clients across the Paris region.

Ownership category

akta.pro rank

Product category

Construction Services

NAICS

Architectural, Engineering, and Related Services (5413)

SIC

Construction - Special Trade Contractors (1700), Services-Engineering Services (8711)

akta.pro primary industry

Design-Build / EPC General Contracting (IMAFAAAD)

akta.pro secondary industry

Specialty Education Facilities Construction (Labs, STEM, CTE Shops, Arts, Athletics) (EDAEABAI)

Keywords

• Building construction services
• Building renovation services
• Building rehabilitation services
• Carpentry woodworking
• Building maintenance services

Headquarters

HQ city

Sannois

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Infrastructure, Marketing or Sales

Revenue model

1. Construction and Renovation Services: General construction services including new construction, rehabilitation, renovation, and maintenance. Revenue is generated through project-based contracts for public and private sector clients. Projects range from €140,000 to €2.7 million.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels1 record

Core offering

ECB Williot is a French general construction company (entreprise générale) founded in 1990, providing building construction, renovation, rehabilitation, and maintenance services across the Île-de-France region. The firm operates an in-house carpentry and woodworking subsidiary (2ABTP), enabling integrated structural fit-out capabilities. Its primary clients are municipalities, public authorities, and private corporate clients requiring turnkey building works.

Product overview

ECB Williot operates as a single unified construction company offering building construction, renovation, rehabilitation, and maintenance services. The company is organized into two main divisions: ECB Williot handles general construction work including structural studies, new construction, and renovation projects; while 2ABTP serves as the specialized woodworking and joinery subsidiary that manages workshop fabrication and on-site installation for finishing work on construction and rehabilitation projects.

Differentiator

Problem solved

Functional benefit

Brands

• 2ABTP: Carpentry and woodworking department created to handle finishing work for ECB's general contracting projects. Operates as a separate entity within ECB with its own organigramme.

Products and services

• Building Construction (Construction) General contractor services for new building construction projects in Île-de-France, serving municipalities, public authorities, and private corporate clients requiring turnkey delivery.
• Building Renovation (Rénovation) Renovation works on existing buildings, delivered as a general contractor for both public and private clients.
• Building Rehabilitation (Réhabilitation) Rehabilitation of buildings, including structural and functional upgrades for public sector and private clients.
• Building Maintenance (Maintenance) Ongoing and corrective maintenance services for buildings, providing recurring support to existing clients.
• Carpentry and Woodworking (via 2ABTP subsidiary) In-house carpentry and woodworking services delivered through subsidiary 2ABTP, supporting ECB Williot projects and external clients with timber structures, joinery, and finishing works.

Quantifiable outcome

• €9 million annual revenue with 45 employees

Named customers14 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

Feature2 records

Partnerships

One partnership is on record.

• Architects and Design FirmscoreOthersECB Williot works in collaboration with various architectural firms and design offices for projects. The company acts as the contractor (entrepreneur) while architects serve as the maître d'œuvre (project manager/designer). Notable partners include Atelier Tiphaine Leclerc, Atelier LES PARTICULES, ARCHIBALD, Cabinet ORDOTEC, Atelier DESMICHELLE, SCOP B-A-BO, and many others across various projects.

Scale indicators4 records

Recent moves4 records

Expansion highlights4 records

Direct peers

• Léon Grosse: French mid-sized general contractor (entreprise générale) offering building construction, rehabilitation, and structural engineering across France, with comparable project sizes and a public/private client mix similar to ECB Williot.
• Demathieu Bard: Independent French general contractor with expertise in building, civil works, and real estate development, serving public and private clients with a comparable general contracting and multi-trade coordination model.
• Rabot Dutilleul: Northern France-based general contractor and developer providing construction, rehabilitation, and property development services with a similar mix of municipal, social housing, and corporate clients.
• GCC (Groupe Construction Chantiers): Mid-sized French general contractor delivering building construction and renovation for public and private clients, with comparable project scope and structure to ECB Williot's offering.
• Cardinal Edifice: French general contractor focused on building construction and rehabilitation for institutional, public, and private clients, with project sizes and multi-trade execution comparable to ECB Williot.
• ETPO (Entreprise de Travaux Publics de l'Ouest): French construction group with general contracting and civil works capabilities for public and private clients, similar to ECB Williot's profile of regional building and infrastructure projects.

Broad incumbents

• Spie Batignolles: Major French construction group offering general contracting, civil works, and real estate development across France; much larger than ECB Williot but competes for the same regional public works tenders.
• Bouygues Bâtiment France: Large French construction subsidiary of Bouygues Group delivering building construction, renovation, and public works across all regions; competes with ECB Williot for larger municipal and enterprise projects.
• Eiffage Construction: Major French general contractor and developer within the Eiffage Group, covering building, public works, and energy projects at national scale; overlaps with ECB Williot in regional construction tenders.
• GTM Bâtiment: Subsidiary of Vinci Construction specializing in building construction and rehabilitation in France, comparable in offering to ECB Williot but at significantly larger scale and broader regional coverage.

Market position

Strengths1 record

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

Compliance29 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 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 ECB Williot