Insitu-a

What Insitu-a does

Insitu-a is a French engineering consultancy (bureau d'études) founded in 2014 and headquartered in Montrouge with a secondary office in Châtillon, Île-de-France. The firm specializes in two interlocking disciplines: wood construction (construction bois) and building envelope engineering (enveloppe du bâtiment). It serves a B2B client base composed of property owners (maîtres d'ouvrage), architects, construction companies, facade contractors, and public-sector entities, delivering technical studies, execution plans (études EXE), and consulting across new construction, timber elevations, and rehabilitation projects in the Greater Paris region.

The firm's core offerings include Assistance à Maîtrise d'Ouvrage Technique, full Maîtrise d'Œuvre for wood structures, Etudes EXE PAC for workshop and field execution, and execution studies for facades, roofing, and waterproofing. Its technical stack is built on CADWORK 2D/3D for timber modeling, AutoCAD 2D for drafting, Acord and Dlubal for structural calculation, and Procal-Calepinage for panel detailing. Notable capabilities include 3D modeling of prefabricated timber panels and CLT floors, point cloud analysis for retrofit dimensioning, and facade fire safety compliance / ATEX certification support. The firm is ISO 9001 and ISO 14001 certified via the Qualité Ingénierie Architecture association and holds OPQIBI qualification as an engineering services provider.

Insitu-a generates revenue through project-based professional services contracts, with pricing negotiated per scope and complexity. Its go-to-market is sales-led and driven by public/private tender responses and professional network referrals within the construction industry in Île-de-France. The 11-person team includes a Directeur Général (Rémi Decoene), a Head of Building Envelope (Vincent Millet), structural engineers, wood construction engineers, and draftspeople. Visible clients include Immobilière 3F, Groupe Valophis Habitat, RIVP, COVIVIO Développement, Mairie d'Auvers-sur-Oise, and Ville de Villejuif, spanning social housing, public administration, and commercial real estate. The firm is privately held with no disclosed external funding or parent company.

Name

Insitu-a

Legal name

Insitu-a

Website

https://insitu-a.fr

Company type

Private

Founded year

2014

Operating status

Operating

Headcount range

1–10 employees

Short description

Insitu-a is a French Île-de-France engineering consultancy specializing in wood construction and building envelope studies, serving property owners, architects, contractors, and public-sector clients with technical consulting, execution plans, and fire safety/ATEX support since 2014.

Ownership category

akta.pro rank

Product category

Structural Engineering Services

NAICS

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

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Insulation & Air/Vapor Barrier Systems (Thermal, Acoustic, WRB/AVB) (IMAFAMAD)

akta.pro secondary industry

Security, Safety & Fire/Life Safety Management (BPABAAAE)

Keywords

• Wood construction engineering
• Building envelope consulting
• Structural engineering services
• Facade fire safety
• Timber prefabrication studies

Headquarters

HQ city

Paris

HQ country

France

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Engineering Studies and Consulting Services: B2B engineering consultancy providing technical studies, execution studies (EXE), and consulting services for wood construction and building envelope projects. Revenue is generated through project-based contracts with property owners, architects, and construction companies.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

Insitu-a is a B2B engineering consultancy (bureau d'études) specialized in wood construction (construction bois) and building envelope (enveloppe du bâtiment). It delivers technical assistance to project owners (assistance à maîtrise d'ouvrage), full design and engineering services (maîtrise d'œuvre), execution studies and workshop plans (études EXE/PAC), and facade/roofing/waterproofing execution studies including fire safety and ATEX certification support for construction projects in Île-de-France.

Product overview

Insitu-a is a specialized engineering consultancy offering wood construction and building envelope services. The company operates as a unified service offering rather than a software platform, providing three interconnected service areas: (1) Assistance à Maîtrise d'Ouvrage Technique for project owner consulting, (2) Maîtrise d'Œuvre for full design and engineering, and (3) Etudes EXE PAC for execution studies. Additionally, Etudes d'Exécution services cover building envelope work including facades, roofing, and waterproofing. The company serves clients across new construction and rehabilitation projects in residential, office, public facilities, and educational buildings.

Differentiator

Problem solved

Functional benefit

Products and services

• Assistance à Maîtrise d'Ouvrage Technique (Technical Project Owner Assistance) Technical consulting for project owners including feasibility studies, regulatory analysis, preliminary sizing, structural calculation verification, fire safety diagnostics, and cost estimation tools for wood construction and building envelope projects.

Quantifiable outcome

• Thermal rehabilitation achieved BBC Rénovation 2025 label for 176 housing units
• +1 more outcomes

Named customers6 records

Segments2 records

Ideal customer profiles3 records

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Six partnerships are on record, tiered core and minor.

• Qualité Ingénierie ArchitecturecoreStrategic or Co-development PartnerAssociation grouping architecture and engineering firms committed to quality and environmental impact. Insitu-a is certified ISO 9001 and ISO 14001 through this association.
• Ingénierie Bois ConstructioncoreStrategic or Co-development PartnerNational gathering of technical engineering firms and experts (building and civil engineering) with wood construction expertise.
• OPQIBIcoreStrategic or Co-development PartnerOPQIBI delivers qualification certificates to engineering service providers in the building sector.
• Univers et conseilsminorStrategic or Co-development PartnerEngineering and consulting firm providing a global and practical approach to wood construction.
• Fibois Île-de-FrancecoreStrategic or Co-development PartnerFibois Île-de-France is a wood interprofession federation that brings together Île-de-France wood construction stakeholders and forest industry professionals.
• ESB (Ecole Supérieure du Bois)minorStrategic or Co-development PartnerEcole Supérieure du Bois is the first higher education institution in wood material sciences and technologies.

Scale indicators2 records

Recent moves5 records

Expansion highlights3 records

Broad incumbents

• Artelia: Artelia is a large French engineering group offering building, structural, and environmental services. Competes with Insitu-a on certain timber and envelope projects while serving broader infrastructure and industry clients.
• SETEC: SETEC is a large French multi-disciplinary engineering group with building, structural, and industrial practices. Overlaps with Insitu-a on building envelope and structural engineering projects.
• Egis: Egis is a major French multi-disciplinary engineering group with building, structural, and sustainability practices that overlap with Insitu-a's services at much larger scale. Indirectly competes for the same tenders but operates across many other domains.
• AIA Life Designers: AIA Life Designers is a French architectural and engineering consultancy with sustainability and building practices. Competes for similar project types to Insitu-a but as part of a much larger integrated practice.
• Ingérop: Ingérop is a major French independent engineering group with structural and building envelope practices. Competes on public and private construction tenders alongside Insitu-a but at significantly larger scale.

Direct peers

• RFR: RFR is a French facade and structural engineering consultancy with strong expertise in complex envelopes, glass facades, and building physics. Comparable to Insitu-a for high-complexity facade execution studies and fire safety consulting.
• T/E/S/S: T/E/S/S is a French building envelope and facade engineering consultancy offering execution studies, fire safety expertise, and technical detailing for facades and roofing — directly comparable to Insitu-a's Enveloppe du Bâtiment practice.
• Vica Innovation: Vica Innovation is a French engineering consultancy specialized in wood and biobased construction, offering structural design and execution studies similar to Insitu-a's Construction Bois practice. Direct overlap in client base (architects, project owners) and timber expertise.
• Arborescence: Arborescence is a French wood engineering firm providing structural studies and consulting for timber construction and rehabilitation. Closely comparable niche specialization, scale, and project types to Insitu-a.

Emerging players

• Univers et Conseils: Univers et Conseils is a French wood construction engineering and consulting firm explicitly named as Insitu-a's industry partner, with comparable niche focus on timber structural engineering. Small-scale direct peer in the same BET network.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/be-insitu-a

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

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 Insitu-a