What LM Ingénieur does

LM Ingénieur is a Paris-based structural and thermal engineering consultancy founded in 2006, specializing in the design and performance validation of buildings constructed with bio-sourced (timber, straw, plant-based) and geo-sourced (earthen, raw earth) materials. The firm serves primarily French public-sector clients, including social-housing operators Paris Habitat OPH, Immobilière 3F, and RIVP, as well as municipal governments and NGOs, working in close collaboration with architectural practices such as Dumont Legrand Architectes and Studio Andrew Todd. Its technical work spans structural engineering, dynamic thermal simulation, and material performance testing — notably through a research partnership with ADEME on the 6e Toit program, which validated full-scale bio-sourced roof assemblies in the Eiffel wind tunnel.

The firm's core offering is project-based engineering consulting, with documented engagements ranging from €70K small-scale interventions to €3.2M complex social-housing programs. It maintains a team of approximately 19 staff built around founding engineers Laurent and Grégoire Mouly, whose complementary structural and thermal expertise forms the intellectual center of the practice. Revenue is generated through fees tied to individual construction projects rather than recurring contracts, producing a workload pattern that mirrors French public-sector construction cycles.

Commercially, LM Ingénieur has executed 13+ documented projects across multiple French regions, including Pas-de-Calais, Indre-et-Loire, and the Île-de-France base. The business model depends on winning tenders and commissions from institutional clients, with pricing tied to project scope and engineering complexity. The firm's differentiator versus generalist structural consultancies is its accumulated empirical knowledge in low-carbon, alternative-material construction, which it leverages through both fee-based engineering work and selected research collaborations.

Name

LM Ingénieur

Legal name

LM Ingénieur

Website

https://lmingenieur.fr

Company type

Private

Founded year

2006

Operating status

Operating

Headcount range

11–50 employees

Short description

LM Ingénieur is a Paris-based structural and thermal engineering consultancy founded in 2006, serving French social-housing operators, municipalities, and architects with specialized expertise in bio-sourced and geo-sourced construction materials across 13+ documented projects.

Ownership category

akta.pro rank

Product category

Structural Engineering Consulting

NAICS

Architectural, Engineering, and Related Services (5413), Engineering Services (541330)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Civil & Structural Engineering Consulting (BPAHAIAA)

akta.pro secondary industry

Energy & Sustainability Management (Energy Audits/Optimization/Carbon & ESG Programs) (IMAIAAAM)

Keywords

• Structural engineering services
• Thermal engineering consulting
• Sustainable construction materials
• Hemp concrete engineering
• Building performance simulation

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

Revenue model

1. Engineering Consulting Services: Professional engineering services provided as part of architectural project teams (maîtrise d'œuvre), including structural engineering and thermal engineering for construction and rehabilitation projects. Revenue is generated through consulting fees on a per-project basis, typically serving as a specialist subcontractor to lead architects.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels1 record

Core offering

LM Ingénieur is a professional engineering consultancy providing structural and thermal engineering services for sustainable construction and rehabilitation projects in France. The firm operates as a specialist subcontractor within architectural design teams (maîtrise d'œuvre), offering expertise in bio-sourced and geo-sourced materials including hemp concrete, timber framing, and natural ventilation systems. Services span three integrated pillars: structure engineering, thermal engineering, and environmental consulting for residential, cultural, and institutional projects.

Product overview

LM Ingénieur is an engineering consultancy firm founded in 2006 by Laurent and Grégoire Mouly, offering three integrated service pillars: Structure Engineering (expertise in old structures, wood framing, metal framing, reinforced concrete), Thermal Engineering (envelope studies, simulation, dynamic thermal, RT/RE studies), and Environmental Consulting (réemploi, bilan carbone, biossourcé, geo sourcé, natural ventilation). The firm has developed specialized expertise in bio-sourced and geo-sourced construction solutions, particularly hemp concrete and massive stone. Their portfolio includes residential, cultural, and institutional projects including OBERKAMPF (stone and CLT structure, 17 dwellings), HARDELOT (Elizabethan theater with natural ventilation research), BRUNOY (rehabilitation with reclaimed materials), MARX DORMOY (biosourced facade with acoustic research), and BELLEVUE (concrete with hemp concrete facade), among others. The three service areas function as an integrated consultancy offering applied together to address the climatic dimension of architecture through form and materiality.

Differentiator

Problem solved

Functional benefit

Products and services

• Structure Engineering Services Structural engineering expertise for construction and rehabilitation projects, including assessment of old and heritage structures, wood framing (charpente bois), metal framing (charpente métallique), and reinforced concrete (béton armé). Provided to architects and developers as part of the maîtrise d'œuvre design team.
• Thermal Engineering Services Thermal engineering including thermal envelope studies, thermal simulation, dynamic thermal analysis (Thermique Dynamique), and RT/RE regulatory compliance studies for building energy performance. Provided to architects and developers for sustainable building design.
• Environmental Consulting Services Environmental engineering services including material reuse (réemploi), carbon footprint assessment (bilan carbone), bio-sourced materials (biossourcé), geo-sourced materials (géo-sourcé), and natural ventilation design. Supports sustainable construction projects with low environmental impact materials and passive cooling strategies.

Quantifiable outcome

• Carbon-neutral architecture approach through bio-sourced materials and natural ventilation
• +1 more outcomes

Named customers12 records

Segments3 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

17 partnerships are on record, tiered core, major and minor.

• Dumont Legrand ArchitectescoreStrategic or Co-development PartnerLong-standing architectural partnership on multiple projects including Les Loges en Josas (10 houses), La Huchette rehabilitation, and Brunoy rehabilitation. LM Ingénieur provides structural and thermal engineering while Dumont Legrand leads architectural design.
• Atelier plus uncoreStrategic or Co-development PartnerArchitectural partner for 6è Toit project - demountable wooden structure workshop for emergency housing. Partnership combining architecture with sustainable engineering expertise.
• ADEME (Agence de la Transition Écologique)majorStrategic or Co-development PartnerResearch funding partner supporting the 6è Toit project as a prototype research building on hemp concrete recycling.
• Gautier (charpenter)minorOthersWood framing contractor for 6è Toit project.
• Gérard Lenain - Construire en ChanvrecoreTechnology or IntegrationSpecialized hemp concrete contractor providing expertise for hemp concrete construction on 6è Toit project.
• Groupe SOS Jeunesse / CAES 37coreStrategic or Co-development PartnerClient and development partner for Monnaie project - new building for youth services including offices and workshops with straw bale insulation.
• Patrick Tiéssé ArchitectecoreStrategic or Co-development PartnerArchitectural partner for Champmotteux municipal building rehabilitation project.
• B+C ArchitectescoreStrategic or Co-development PartnerArchitectural partner for Poliveau sports court covering project (800m²) in Paris.
• Jérémy Galvan ArchitectecoreStrategic or Co-development PartnerArchitectural partner for Monnaie project with Groupe SOS Jeunesse.
• NXNW ArchitectescoreStrategic or Co-development PartnerArchitectural partner for Myrha housing project (4 dwellings, 1.2M euros) in Paris.
• MDETC (économiste)minorOthersQuantity surveyor / cost consultant on Myrha project.
• North by NorthWest ArchitectescoreStrategic or Co-development PartnerArchitectural partner for Bellevue housing project (15 units, 1.56M euros) in Boulogne.
• Barrault & Pressaco ArchitectescoreStrategic or Co-development PartnerArchitectural partner for Marx Dormoy housing project (14 units + commerce, 2.6M euros) in Paris.
• Studio Andrew ToddcoreStrategic or Co-development PartnerLead architectural firm for Hardelot Elizabethan theater project (1.56M euros) including experimental natural ventilation design with Eiffel wind tunnel research.
• Atelux (fluide)minorOthersFluid/mechanical engineering consultant on Oberkampf project.
• ALP (économie)minorOthersCost consulting partner on Oberkampf project.
• QCS Services (acoustique)minorOthersAcoustic engineering consultant on Oberkampf project.

Scale indicators3 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• Tribu Energie: French building sustainability consultancy offering thermal studies, RE2020 compliance, and environmental engineering. Comparable in scope of services (thermal + environmental), client base (architects and developers), and specialization in bio-sourced / low-carbon construction.
• Inddigo: French consultancy specialized in sustainable building, energy efficiency, and bio-sourced construction. Comparable as an independent specialist consultancy serving architects and developers on low-carbon projects in France.
• Pouget Consultants: Independent French building physics consultancy specialized in thermal, energy, and environmental performance of buildings. Directly comparable for thermal/environmental engineering services delivered to architectural teams, including RE studies and bio-sourced material expertise.
• AMOES: French building physics and environmental engineering consultancy providing thermal simulation, daylight studies, and sustainability consulting. Comparable niche player in building performance engineering, serving architects and developers on sustainable projects.
• Franck Boutté Consultants: Paris-based independent engineering consultancy specializing in environmental and thermal engineering for sustainable buildings. Highly comparable: similar size, similar Paris focus, similar emphasis on bio-sourced materials, dynamic simulation, and integrated climate-responsive design.
• EODD Ingénierie: French engineering consultancy dedicated to sustainable construction and bio-based materials. Highly relevant peer: similar focus on biosourced materials, timber, hemp, and straw; serves comparable architectural and public-sector clients across France.

Broad incumbents

• WSP France: Global engineering consultancy with French operations providing building engineering and sustainability consulting. Comparable in technical services but operates at much larger scale and increasingly competes for the same sustainable public-sector projects.
• Setec Bâtiment: Large French engineering group offering integrated structural, thermal, and environmental services for buildings. Represents the broader-incumbent threat: increasingly bundling all services LM Ingénieur provides under one contract, capturing larger mandates.
• Ginger Burgeap: Major French environmental and sustainability engineering consultancy (part of Ginger group). Comparable in environmental/sustainability scope but at significantly larger scale, with broader geographic coverage and resources that small firms like LM Ingénieur cannot match.
• Egis Bâtiments: Major French engineering consultancy providing full-service building engineering including structural, thermal, and environmental disciplines. Comparable end markets (public clients, social housing, cultural venues) but with vastly greater scale and integrated delivery.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/lm-ing%C3%A9nieur

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 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 LM Ingénieur