Hors Site Conseil

What Hors Site Conseil does

Hors Site Conseil is a Lyon-based French consulting firm founded in 2019 that operates as the first cabinet de conseil et d'assistance à maîtrise d'ouvrage (AMO) specialized in off-site 3D modular construction and Design for Manufacture and Assembly (DfMA) processes. The firm advises public and private project owners, construction companies, prefabrication industrialists, architects, and engineering firms on how to design, specify, and deliver buildings using factory-produced modular components rather than traditional on-site methods. Its service portfolio is organized around five client-segment modules — public project owners, private developers, building companies, industrialists, and architects/engineering firms — covering architectural programming, feasibility studies, DfMA simulation, technology-partner selection, and project management support under French MOP law or global performance contracts. Core deliverables emphasize 50% construction-time reductions, up to 90% factory fabrication, and significant waste and carbon-emission reductions versus conventional methods.

The firm's technology stack centers on DfMA methodology applied to 3D off-site modular construction, supported by collaborative BIM design workflows and digital partner-selection tooling. Its principal digital asset is the Outil de Sourcing, a directory platform that maps off-site construction companies by geography and technical capability, offered with free basic access and premium subscriptions. The firm maintains a strategic partnership with BloctoBuild, whose library of configurable low-carbon digital blocks is integrated into the sourcing ecosystem, giving architects and manufacturers a design-to-supplier workflow. Hors Site Conseil monetizes almost exclusively through professional services fees on individual consulting and AMO engagements, with project-based, quote-driven pricing and no publicly disclosed rate cards.

Commercially, Hors Site Conseil pursues a sales-led and event-driven go-to-market: the founder (Pascal Chazal) appears on business media such as B Smart TV, the firm participates in industry conferences (notably the 2nd Colloque de la Construction Industrielle et Modulaire et du Hors-Site in Nancy, 2019), and engages clients through direct outreach supported by its website and sourcing platform. Notable engagement references include the French Ministry of Defence (Sentinelle-operation modular housing program covering 20+ sites and 3,000+ modules), CNOUS-framework student housing operations totaling 75M€+ and 1,200+ modular rooms, a Pernot Ricard Université corporate hotel project (3.4M€, 57 rooms), an SATVAC 700-bed mountain hotel in Le Corbier, and departmental buildings for the Conseil Départemental de l'Isère. The company is privately held, independent of any institutional investors or parent entity, and operates nationally within France.

Name

Hors Site Conseil

Legal name

HORS SITE CONSEIL

Website

https://hors-siteconseil.com

Company type

Private

Operating status

Operating

Headcount range

1–10 employees

Short description

Hors Site Conseil is a Lyon-based French consulting firm specializing in off-site 3D modular construction and DfMA advisory. It serves public and private project owners, construction firms, industrialists, and architects across France, supplemented by a digital sourcing platform.

Ownership category

akta.pro rank

Product category

Construction Consulting Services

NAICS

Engineering Services (54133), Architectural, Engineering, and Related Services (5413)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Construction Engineering & Constructability Consulting (BPAHAIAN)

akta.pro secondary industry

Construction Program Management (Multi-site/Portfolio) (IMAFAAAF)

Keywords

• Off-site construction consulting
• DfMA advisory services
• Modular construction consulting
• Construction project management
• Industrialized building methods

Headquarters

HQ city

Lyon

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Consulting and AMO Services: Professional consulting services for off-site construction projects, including project programming, feasibility studies, design assistance, and project management support throughout the construction lifecycle. Services are provided to public and private project owners, construction companies, industrialists, architects, and engineering firms.

Go-to-market motion2 records

Distribution channels1 record

Marketing channels4 records

Core offering

Hors Site Conseil provides specialized consulting and Assistance à Maîtrise d'Ouvrage (AMO) services for off-site 3D modular construction and DfMA (Design for Manufacture and Assembly) projects. The firm advises public project owners, private developers, construction companies, prefabrication industrialists, and architects/engineering firms across project programming, feasibility, design integration, partner sourcing, and project management support. It also operates a Sourcing Tool digital directory platform connecting project owners with off-site construction specialists across France.

Product overview

Hors Site Conseil is the first French consulting firm (cabinet de conseil et d'assistance à maîtrise d'ouvrage) specialized in off-site construction (procédé constructif hors-site 3D) and DfMA (Design for Manufacture and Assembly) processes. The firm operates as a service-based consultancy rather than a software product company. Its portfolio consists of a Sourcing Tool (Outil de Sourcing) — a directory platform connecting project owners with off-site construction specialists — complemented by specialized advisory service modules targeting five client segments: public project owners, private project owners, building companies, prefabrication industries, and architecture/engineering firms. All services leverage off-site construction expertise including BIM, DfMA methodology, and industrial construction technologies.

Differentiator

Problem solved

Functional benefit

Products and services

• Outil de Sourcing (Sourcing Tool)

Quantifiable outcome

• Construction time reduced by 50% compared to traditional on-site methods
• +4 more outcomes

Named customers5 records

Segments5 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature3 records

Partnerships

One partnership is on record.

• BloctoBuildsupportingStrategic or Co-development PartnerBloctoBuild provides a library of configurable digital blocks designed for low-carbon and off-site construction solutions. This partnership supports the sourcing tool platform by offering design integration capabilities for users. BloctoBuild helps industrialists and designers reference their products in the off-site ecosystem.

Scale indicators6 records

Recent moves5 records

Expansion highlights4 records

Emerging players

• McAvoy Group: UK off-site construction manufacturer with dedicated consultancy/design support for education, healthcare, and infrastructure; comparable in combining off-site manufacturing expertise with project-owner advisory.
• Carbon Dynamic: UK off-site timber construction firm combining manufacturing with design and advisory services; parallels HSC's emphasis on DfMA, factory quality control, and sustainability-driven building methods.
• Wernick Group: UK off-site modular construction specialist serving education, healthcare, and defense sectors with permanent and temporary modular buildings — directly comparable end-markets to HSC's public-sector AMO engagements.
• TopHat: UK modular housing manufacturer using DfMA-driven factory fabrication — directly comparable to HSC's client-side DfMA advisory with overlapping customer base of developers pursuing industrialized residential construction.

Broad incumbents

• Arcadis: Global design and engineering consultancy with construction advisory capabilities and European public-sector footprint; competing incumbent on large multi-site construction programs where HSC positions as specialist AMO.
• Portakabin: One of Europe's largest modular building providers with in-house design, manufacturing, and advisory services; comparable end-customers (education, defense, government) and overlap in off-site methodology advisory.
• Algeco: European leader in modular space and off-site building solutions serving education, defense, and government clients — comparable in scale, methodology, and customer segments to HSC's public-sector engagements.
• AECOM: Global engineering and program management consultancy with off-site/modular construction advisory practice; a likely competitor on larger French public-sector AMO mandates where scale and multi-disciplinary teams are required.

Direct peers

• Buildoffsite: UK membership and knowledge organization promoting off-site construction across the value chain; provides advisory, events, and best-practice dissemination closely parallel to Hors Site Conseil's French-market role.
• Patch Conseil: French construction advisory firm whose branding overlaps with Hors Site Conseil (shared contact domain patchconseil.com on HSC website), suggesting either a sister entity or very closely related consulting practice targeting similar French construction clients.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/hors-site-conseil

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 Hors Site Conseil