DEMSEY

What DEMSEY does

DEMSEY is a privately held French metal construction and solar installation contractor headquartered in Les Lèches (Dordogne), operating since 1999 and rebranded from DMC in 2021. The company delivers five interlocking service lines: métallerie-serrurerie (metalwork, locksmithing, boiler making, artistic ironwork), construction métallique (structural steel building construction, including a first 4,000 m² building completed in 2019), centrales photovoltaïques (photovoltaic solar power plant installation, acquired via the HSC activity in 2020), sous-traitance de fabrication (manufacturing subcontracting from its 1,600 m² workshop), and since 2024, IRVE (electric vehicle charging infrastructure). Underlying capability rests on a 2,000 m² headquarters facility on an 8,500 m² plot at ZA Les Lèches (A89 Junction 13), the 1,600 m² Les Lèches workshop, and a 2,000 m² SOBLACO production site acquired in 2022 at Saint André de Cubzac along the A10. The technology stack is conventional metal fabrication equipment supplemented by engineering staff added in 2019; no proprietary software, AI, or digital platform is in evidence.

DEMSEY generates revenue through project-based, quote-priced contracts rather than recurring fees, drawing on three customer segments: public sector and government clients (via formal marchés publics tenders, since 2018), private sector businesses (commercial metal buildings, integrated solar, EV charging), and individual homeowners (small-scale locksmithing, ironwork, fabrication). The combination of metal building + integrated photovoltaic + EV charging is positioned as a turnkey 'solar building' offer for commercial and institutional buyers. Distribution is regional (Nouvelle-Aquitaine and adjacent areas via the A89/A10 corridor), delivered through direct enterprise sales and public tender responses; pricing is bespoke per project and not publicly disclosed. The go-to-market motion is enterprise field sales with no digital self-serve channel and no disclosed marketing beyond the demsey.fr website.

At approximately 20 employees as of 2024 (up from 4 in 1999, with discrete hiring waves in 2017 and 2019), DEMSEY remains a small, owner-operated regional contractor. The company is privately held with no disclosed venture, private equity, or institutional capital, and no external funding rounds, IPO activity, or regulatory disclosures appear in the source material. Revenue is not publicly disclosed.

Name

DEMSEY

Legal name

DEMSEY

Website

https://demsey.fr

Company type

Private

Founded year

1999

Operating status

Operating

Short description

DEMSEY is a French regional metal construction and solar installation contractor serving public-sector, private business, and individual clients across Nouvelle-Aquitaine from Les Lèches, offering locksmithing, structural steel buildings, photovoltaic systems, and EV charging infrastructure.

Ownership category

akta.pro rank

Product category

Metal Construction Services

NAICS

Sheet Metal Work Manufacturing (332322), Solar Electric Power Generation (221114), Ornamental and Architectural Metal Products Manufacturing (33232)

SIC

Electrical Work (1731), Sheet Metal Work (3444), Prefabricated Metal Buildings & Components (3448)

akta.pro primary industry

Energy & Renewables Specialty Contracting (Solar PV, Storage, EV Charging) (IMAFALAJ)

akta.pro secondary industries

Renewable Energy Industrial Facilities Construction (Solar, Wind, Storage) (IMAFADAD), Sheet Metal & Ductwork Contracting (IMAFALAH)

Keywords

• Metal construction
• Locksmithing services
• Photovoltaic installation
• Metal fabrication
• EV charging infrastructure

Headquarters

HQ city

Les Lèches

HQ country

France

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. Metal Construction and Fabrication: One-time project-based revenue from metal building construction, structural steel, locksmithing, boiler making, and artistic ironwork. Revenue is generated through direct sales to private and public sector clients, with projects ranging from small-scale private work to large public procurement contracts.
2. Photovoltaic Solar Power Plants: Acquired in 2020, the HSC photovoltaic solar power plant activity provides complementary solar installation services on DEMSEY's metal buildings. Revenue is generated through the sale and installation of complete solar power systems.
3. Electric Vehicle Charging Infrastructure (IRVE): Since 2024, DEMSEY has expanded into the installation of electric vehicle charging infrastructure, generating project-based revenue through the deployment of charging stations.
4. Manufacturing Subcontracting: Subcontracting fabrication services to other companies, utilizing the company's 1,600 m² workshop for locksmithing and metal structural work.

Go-to-market motion1 record

Distribution channels4 records

Marketing channels1 record

Core offering

DEMSEY designs, fabricates, and installs metal buildings and metalwork, providing locksmithing, artistic ironwork and boiler-making services, structural steel building construction, photovoltaic solar power plants installed on its metal buildings, manufacturing subcontracting from a 1,600 m² workshop, and, since 2024, IRVE-certified electric vehicle charging infrastructure. The company serves private businesses, public sector clients via tenders, and individual homeowners primarily across the Nouvelle-Aquitaine region of southwestern France.

Product overview

DEMSEY is a construction company specializing in solar buildings and metal construction. The company operates as a unified service provider offering five core interlocking services: Métallerie Serrurerie (metalwork and locksmithing), Construction métallique (metal building construction), Centrale photovoltaïque (photovoltaic solar power plants), Sous-traitance fabrication (manufacturing subcontracting), and IRVE (electric vehicle charging infrastructure). The portfolio is complemented by SOBLACO, an acquired brand with its own production facility in Gironde. Together, these services allow DEMSEY to deliver complete metal buildings with integrated solar solutions and EV charging capabilities.

Differentiator

Problem solved

Functional benefit

Products and services

• Métallerie Serrurerie Metalwork and locksmithing services covering ironwork, artistic ironwork, and boiler-making for both private clients and public markets.
• Construction métallique Metal construction services for buildings of all kinds, including structural steel framework for large-scale projects.
• Centrale photovoltaïque Photovoltaic solar power plants (HSC) providing complete solar energy solutions installed on DEMSEY's metal buildings.
• Sous-traitance fabrication Manufacturing subcontracting services performed in a 1,600 m² workshop for locksmithing and metal structural framework work for other companies.
• Infrastructure de recharge de véhicules électriques (IRVE) Electric vehicle charging infrastructure installation services, added to DEMSEY's portfolio in 2024 under its IRVE qualification.

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

One partnership is on record.

• SOBLACOcoreStrategic or Co-development Partner · 1 January 2022DEMSEY acquired SOBLACO in 2022 to consolidate its presence in Gironde. SOBLACO operates a 2,000 m² production site at Saint André de Cubzac along the A10 highway. This acquisition expanded DEMSEY's manufacturing capacity and geographic footprint in the region.

Scale indicators6 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• SPIE France: Major French multi-technical services group covering electrical installation, EV charging (IRVE), and energy infrastructure — directly overlaps with DEMSEY's IRVE and PV electrical scope as a much larger incumbent.
• Bouygues Construction: Major French construction group active in industrial buildings, public infrastructure, and energy projects; relevant incumbent for large metal construction and public procurement tenders.
• RES (Renewable Energy Systems): Large European renewable energy EPC firm active in solar PV construction; relevant incumbent comparator for DEMSEY's photovoltaic installation activity at a substantially larger scale.
• Eiffage Construction: Large French construction group active in industrial metal building construction and infrastructure; broader competitor for large-scale public metalwork tenders.
• Vinci Construction: Largest French construction group, active across metal structures, public infrastructure, and energy projects; sets the competitive ceiling for large public tenders DEMSEY participates in.

Others

• Enedis: French distribution system operator driving EV charging infrastructure rollout; relevant ecosystem counterparty for DEMSEY's IRVE-qualified EV charging installation activity.

Direct peers

• Castel & Fromaget: French specialist in steel construction and metal envelope for industrial and commercial buildings; comparable core offering of structural metalwork and cladding for the same B2B/industrial customer base.
• SOBLACO (pre-acquisition peer profile): Acquired by DEMSEY in 2022; operated as a regional metal fabrication and subcontracting workshop in Gironde — historically a direct regional competitor in locksmithing/metalwork.
• Groupe Briand: Major French metal construction group delivering structural steel buildings, locksmithing, and turnkey metalwork across France — directly comparable in core metal building and serrurerie activities, though at substantially larger scale.

Emerging players

• VSB Energies Nouvelles: French renewable energy developer and EPC contractor for solar PV plants; comparable on the photovoltaic solar power plant installation side of DEMSEY's portfolio.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/dmc.vingtquatre

Revenue estimate

Valuation estimate

Number of profiles

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 DEMSEY