What Terrell Group does

Terrell Group is a privately held French engineering consultancy founded in 1982 and headquartered in Boulogne-Billancourt, with additional offices in Toulouse, Lyon, London (operated as Terrell Ltd), and Beirut. The firm delivers multidisciplinary building engineering across three integrated service lines: Structural Engineering (concrete, steel, timber, and hybrid systems including timber-concrete composites), Façades Engineering (curtain walls, glazed envelopes, glass roofs), and Mechanical & Electrical (M&E) Engineering, with documented expertise in obtaining sustainability certifications including HQE, BREEAM, LEED, BBCA, and Effinature.

Its core technology stack is centered on Building Information Modeling (BIM) using REVIT for 3D structural design and envelope coordination, allowing complex geometries and large spans (e.g., 96m Les Halles canopy, 110,000 m² hospital near Disneyland Paris, T1 La Défense 70,000 m², Flying Whales airship factory 69,000 m²) to be coordinated across disciplines within a single model environment. Notable proprietary or differentiated methodologies include timber-concrete composite high-rise construction (Hyperion Tower, Bordeaux, BIM D'OR 2019).

Terrell operates a pure B2B professional services model, generating revenue through project-based consulting contracts with architects, developers, and public clients. Distribution is exclusively direct enterprise engagement via competitive tendering and direct negotiation; the firm has no resellers, no SaaS or productized offering, and no public pricing. Customers span real estate developers (Eiffage, Icade, Capital & Continental), technology (Google France), healthcare (Centre Hospitalier de Lagny Marne-La-Vallée), education (Ville de Saint-Cyr-sur-Loire), and aviation/industrial (SCI Océan / Flying Whales), with project execution delivered across 15+ countries spanning France, the rest of Europe, the Middle East, Africa, and Asia. The firm is incorporated as a Société par Actions Simplifiée (SAS) with a registered capital of €779,710 and a headcount of 11–50 employees.

Name

Terrell Group

Legal name

Terrell Group

Website

https://terrellgroup.net

Company type

Private

Founded year

1982

Operating status

Operating

Headcount range

11–50 employees

Short description

Terrell Group is a French multidisciplinary engineering consultancy founded in 1982, delivering integrated structural, façade, and MEP engineering for complex building projects across Europe, the Middle East, and Africa for developers, architects, and public-sector clients.

Ownership category

akta.pro rank

Product category

Engineering Consultancy Services

NAICS

Engineering Services (541330), Engineering Services (54133), Architectural, Engineering, and Related Services (5413)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Civil & Structural Engineering Consulting (BPAHAIAA)

akta.pro secondary industry

Sustainable/Green Building & LEED Consulting (BPAHAKAG)

Keywords

• Structural engineering services
• Façade engineering design
• MEP engineering consulting
• Multidisciplinary building engineering
• Construction engineering consultancy

Headquarters

HQ city

Boulogne-billancourt

HQ country

France

HQ region

Europe

Offices5 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 to architects, developers, and public clients for building construction projects. Services include structural engineering, façade engineering, and M&E engineering. Revenue is generated through project-based consulting contracts for new construction and renovation projects.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Terrell Group is a multidisciplinary engineering consultancy providing structural engineering, façade engineering, and mechanical & electrical (M&E) engineering services for building construction projects. The firm delivers integrated engineering design from concept through detailed design and site supervision, with particular specialization in complex projects combining technical challenges and architectural ambition. Services are delivered through coordinated multi-disciplinary teams using BIM workflows (REVIT) for design coordination.

Product overview

Terrell Group is a multidisciplinary engineering consultancy founded in 1982, offering integrated engineering services across three core disciplines: Structural Engineering, Façades Engineering, and M&E (Mechanical & Electrical) Engineering. The company operates as a unified multidisciplinary team where specialists collaborate to deliver optimised holistic solutions for buildings and bridges. Their portfolio spans all building types with particular expertise in projects combining technical complexity and architectural ambition. The engineering services encompass the entire project lifecycle from concept through to detailed design and site supervision.

Differentiator

Problem solved

Functional benefit

Products and services

• Structural Engineering
• Façades Engineering
• M&E Engineering
• Multidisciplinary Engineering Integration

Quantifiable outcome

• BIM D'OR 2019 award for Hyperion Tower project demonstrating innovative timber-concrete construction methodology
• +2 more outcomes

Named customers8 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators3 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• Egis: Major French-headquartered multidisciplinary engineering group covering buildings, infrastructure, and transportation. Closest large-scale peer to Terrell's integrated structural/façade/MEP building-engineering model and direct competitor on French commercial real estate tenders.
• Setec: Independent French engineering group with strong building structures and façades expertise. Closest like-for-like peer in scale and positioning, competing on architecturally ambitious French projects including towers and public infrastructure.
• Artelia: French engineering consultancy offering structural, MEP, and project management services across buildings, energy, and infrastructure. Competes head-to-head with Terrell on complex French building projects and shares a similar multidisciplinary, premium-positioning strategy.
• Buro Happold: International engineering consultancy renowned for complex structural and façade engineering on architecturally ambitious buildings. Closest like-for-like peer on technically demanding projects where architectural ambition meets engineering complexity.

Broad incumbents

• Arup: Global engineering consultancy with deep structural, façades, and building services expertise. Competes on flagship international projects (towers, cultural buildings, sustainable design) and shares Terrell's multidisciplinary integration approach.
• Bureau Veritas: French-headquartered testing, inspection, and certification group with significant building and infrastructure engineering services. Adjacent competitor in the broader building services ecosystem and overlaps in sustainability certification work.
• Arcadis: Global design and engineering consultancy with significant French operations through its IBI/Callandret acquisition. Competes on large French and international building projects but at much greater scale and broader portfolio.
• Tractebel (ENGIE): Engineering consultancy owned by ENGIE with deep European building and energy expertise. Competes on large-scale French and international projects requiring integrated structural and MEP engineering.
• WSP: Global engineering professional services firm with strong building structures and façades practices in Europe. Overlaps with Terrell on large commercial and public-sector projects, especially in UK and France.
• Jacobs: Global professional services firm with critical mission solutions and building engineering practices. Competes on large international projects where integrated engineering design is required.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/terrell

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

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 Terrell Group