Geslin Concept

What Geslin Concept does

Geslin Concept is an independent French modular construction firm headquartered in Lançon-de-Provence (PACA region), founded in 2008 by Sébastien Geslin, an operator with 15+ years of industry experience who previously led approximately 100 projects at a southern France modular builder. The company designs and manages the fabrication, customization, and installation of modular buildings and repurposed maritime containers for construction sites, industrial operators, public-sector buyers (mairies, hospitals, chambers of commerce, regional and general councils), and individual consumers. Its core technology is centered on standardized maritime containers (steel corten corrugated, 8 to 40 feet, stackable to 7x load capacity) and factory-fabricated modular units built on steel frames with sliding panels that enable single- or multi-floor configurations, with full interior and exterior customization including insulation, electrical, plumbing, HVAC, flooring, windows, cladding, and finishes. Specialized sub-products include bungalow offices, monobloc guard booths, sanitary modules, changing rooms, an eco-responsible modular office line, and rehabilitation services for existing structures.

The business is project-based and operates on a direct, reactive sales motion: a three-step process (PROJECTISER, DEVISER, REALISER) with free quotes, engaged via phone (07 85 78 75 64) and email ([email protected]). Pricing is unit-based with used containers starting at €1,200 HT, new 20' containers from €2,100 HT, new 40' containers from €3,200 HT, modular kits (colisé) from €2,000 HT, and assembled modular buildings from €4,900-€5,900 HT; bespoke projects (guard booths, changing rooms, full turnkey installations including feasibility, workshop fabrication, transport, and site installation) are quoted individually. Distribution combines depot pickup, regional delivery in PACA, and nationwide delivery across France. Execution is delivered through a curated partner ecosystem rather than captive manufacturing, with suppliers and subcontractors including TCSI, Promodular, Yesss Electric, Architecte Cuny, ArcelorMittal, Containex, Mediaco, Getek, Sigma, RESO, and SITI Europe. Named reference customers include Bouygues, Vinci, DUMEZ, Alstom, GDF/SUEZ, and Sanofi, alongside public-sector buyers.

The firm is owner-managed, founder-controlled, with 1-10 employees, no external funding, no subsidiaries, and no disclosed revenue. Marketing is light: a company website (geslin-concept.fr), an Instagram presence (@geslin_concept), a project portfolio gallery, and direct contact, with no evidence of paid acquisition, digital sales tooling, or AI/ML capability. The operating posture is consistent with a small, experienced, independent professional leveraging a 15-year partner network to deliver customized modular projects rather than a scale-driven enterprise.

Name

Geslin Concept

Legal name

Geslin Concept

Website

https://geslin-concept.fr

Company type

Private

Founded year

2008

Operating status

Operating

Headcount range

1–10 employees

Short description

Geslin Concept is an independent French modular construction firm in Lançon-de-Provence that designs, customizes, and installs maritime containers and factory-fabricated modular buildings for construction firms, industrial operators, public-sector buyers, and individual clients across the PACA region and France.

Ownership category

akta.pro rank

Product category

Modular Construction

NAICS

Prefabricated Metal Building and Component Manufacturing (332311)

SIC

Prefabricated Metal Buildings & Components (3448)

akta.pro primary industry

Residential Modular & Prefabricated Home Construction (IMAFABAF)

Keywords

• Modular construction services
• Container modification
• Prefabricated buildings
• Portable site offices
• Building rehabilitation

Headquarters

HQ city

Lançon-provence

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Container Sales: Sale of new and used maritime containers in various sizes (20' and 40'). New containers sold at depot departure prices. Used containers available from 1,200€ HT. Optional upgrades such as garage doors (+1,300€). One-time transaction-based revenue.
2. Modular Building Sales: Sale of modular buildings in kit (colisé) format from 2,000€ HT, or with assembly from 4,900€ HT to 5,900€ HT. New and used options available. Includes bungalows, offices, guard booths in all sizes on quote.
3. Custom Construction & Rehabilitation Services: Turnkey modular construction services including feasibility study, workshop fabrication, transport, and site installation. Full project management from concept to delivery for temporary or permanent installations. Rehabilitation of existing structures.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

Geslin Concept designs, customizes, and installs modular buildings and shipping container-based constructions. The company sells new and used maritime containers (8 to 40 feet) and factory-fabricated modular buildings (in kit or fully assembled format), with full customization of interior and exterior finishes. It also provides turnkey construction, installation, rehabilitation of existing structures, and France-wide delivery.

Product overview

Geslin Concept operates as a single-product platform with specialized modular construction and container solutions. The core offerings consist of standardized shipping containers (8 to 40 feet, available new or used) and factory-fabricated modular buildings (available as colisé kits or fully assembled units). These core products are complemented by specialized sub-products including bungalow offices, guardhouses, sanitary units, and changing rooms. The company differentiates through extensive customization services (interior/exterior finishes, electrical, plumbing, climate control) and rehabilitation of existing structures. Delivery and installation services are offered nationwide from their PACA base.

Differentiator

Problem solved

Functional benefit

Products and services

• Shipping Container (Conteneur) Standardized steel maritime containers (8 to 40 feet) sold in new or used condition, with optional upgrades such as garage doors (+1,300€ HT) and full customization. Available for professionals and individuals via depot pickup or delivery throughout France.
• Modular Building Unit (Module Modulaire) Factory-fabricated modular buildings offered in colis\u00e9 (kit) format starting at 2,000€ HT or with professional assembly from 4,900€ HT to 5,900€ HT, with customizable dimensions, insulation, electrical, plumbing, and interior finishes. Available in monobloc or assembled configurations, new or used.
• Office Bungalow (Bungalow Bureau) Prefabricated office bungalow available in kit form (20 feet Basic Line) or fully assembled, designed for workspace applications with options for electrical and climate control installation.
• Guard Booth (Monobloc Poste de Garde) Single-unit prefabricated guardhouse/booth structure suitable for security checkpoints, reception areas, or monitoring stations, available on quote in all sizes.
• Sanitary Module (Module Sanitaire) Customizable modular sanitary units including toilets, washrooms, and changing facilities for construction sites, events, or permanent installations, available on quote.
• Changing Room Module (Module Vestiaire) Modular changing room units designed for construction sites, industrial facilities, and sports venues with locker configurations and climate control options.
• Eco-Responsible Modular Office (Module Plus Line / Bureau Modulaire \u00c9co-Responsable) Sustainable modular office solution designed for eco-conscious businesses with environmental certifications and green building materials, for sustainable workspace applications.
• Modular Storage Space (Espace de Stockage Modulaire) Modular storage units designed for industrial, commercial, or personal use, customizable in size and configuration.
• Custom Container Modification (Am\u00e9nagement de Conteneur Sur-Mesure) Custom interior and exterior container modification services including electrical systems, plumbing, heating, air conditioning, flooring, windows, and finishes such as wood cladding or paint, delivered as a tailored service.
• Existing Structure Rehabilitation (R\u00e9habilitation de Construction Existante) Renovation and rehabilitation services for aging or worn modular structures, bringing them up to current norms, homologation, and security standards.
• Nationwide Delivery (Livraison Nationale) Delivery services available throughout the PACA region and across all of France for containers and modular units, managed through the company's logistics network.

Quantifiable outcome

• Rapid deployment - modules fabricated in parallel with site preparation
• +2 more outcomes

Named customers9 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

One partnership is on record.

• Architecte CunyminorStrategic or Co-development PartnerArchitectural partnership for design and planning of custom modular construction projects, enabling comprehensive solutions for clients.

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Cougnaud: Leading French modular construction company producing prefabricated buildings for education, healthcare, industry, and public-sector clients; competes head-on with Geslin for turnkey modular projects in France.
• OBM Construction: French modular construction specialist offering prefabricated buildings for industrial, commercial, and public-sector use; comparable in scale and product offering to Geslin Concept with similar customer segmentation.
• Algeco: European market leader in modular space solutions with a French base, offering container and modular building rental and sales to construction, industrial, and public-sector clients — directly comparable in product mix and customer segments to Geslin Concept.
• Containex: Austrian-headquartered provider of container-based and modular space solutions across Europe; both a direct competitor and an existing supplier partner to Geslin Concept, offering comparable product lines (containers, modular kits, custom'aménagement).
• Module-T: French container-based modular construction company offering prefabricated buildings, container conversions, and turnkey installations — closely mirrors Geslin's product/service model and target verticals (construction, industrial, commercial).
• Bodard Construction Modulaire: French modular construction company providing turnkey prefabricated buildings for construction sites, industry, education, and events; directly comparable to Geslin in product portfolio, target verticals, and France-wide delivery model.
• ProContain: European manufacturer and supplier of container-based modular space solutions with full customization services; competes with Geslin in the container'aménagement and turnkey modular building segments.

Others

• Portakabin: UK-based modular construction leader with pan-European presence, delivering modular buildings for education, healthcare, and commercial use — overlaps with Geslin's product categories but operates at substantially larger scale and broader geographic footprint.

Broad incumbents

• Losberger De Boer: Global provider of modular space and temporary structures for events, industry, and public-sector clients; broader portfolio than Geslin but significant overlap in industrial and modular building offerings.
• Touax: French-listed company specializing in modular building and container leasing/rental with international operations; competes with Geslin in the modular space and container segments, particularly for industrial and construction-site clients.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights7 records

Customer concentration

• Instagraminstagram.com/geslin_concept
• LinkedInlinkedin.com/company/geslin-concept-fr

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 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 Geslin Concept