# 30 leading Construction companies in the Haute-Garonne department
Tamtam tracks 51 Construction companies headquartered in the Haute-Garonne department. This list ranks the 30 largest by number of employees on LinkedIn, led by SEAC, DODIN CAMPENON BERNARD and GIRAUD. Their median headcount is 85. Half of them were founded in 1991 or later. The most common headquarters are Toulouse (13), Colomiers (2) and Ramonville-Saint-Agne (2).
The companies listed are mid-sized and large firms in the construction sector, based in the Haute-Garonne department. They cover a range of specialized services within construction. For example, SEAC focuses on structural solutions and floor techniques, while DODIN CAMPENON BERNARD designs and manages complex infrastructure projects. AGTHERM specializes in climate engineering and energy performance, and SCAM TP provides water services.
A notable pattern is the concentration of headquarters in Toulouse, with companies like SEAC, DODIN CAMPENON BERNARD, OTCE, and BOURDARIOS located there. Other firms, such as GIRAUD and socotrap, are based in Ramonville-Saint-Agne. The companies generally have established histories, with many founded between the 1960s and 1990s.
馃嚝馃嚪 Haute-Garonne 路 30 companies 路 Updated Nov 11, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [SEAC](https://www.tamtam.ai/c/seac) (seac-gf.fr)
Specializing in structural solutions for buildings, focusing on floor techniques to meet RT2012 regulations Providing thermal, acoustic, and environmental benefits for various construction projects | Construction | 馃嚝馃嚪 Toulouse | 494 | 1962 |
| 2 | [DODIN CAMPENON BERNARD](https://www.tamtam.ai/c/dodin-campenon-bernard) (dodincampenonbernard.fr)
Designs, builds, and manages complex infrastructure projects: transport, hydraulic, environmental, energy, and functional structures, globally and locally. | Construction | 馃嚝馃嚪 Toulouse | 381 | 2008 |
| 3 | [GIRAUD](https://www.tamtam.ai/c/giraud) (giraudbtp.com)
Construction company providing building and construction services based in Ramonville-Saint-Agne, Midi-Pyr茅n茅es, France region. | Construction | 馃嚝馃嚪 Ramonville-Saint-Agne | 271 | 1998 |
| 4 | [OTCE](https://www.tamtam.ai/c/otce) (otce.fr)
Engineering group providing comprehensive construction and development services across multiple sites, managing projects from design to operation with multidisciplinary expertise. | Construction | 馃嚝馃嚪 Toulouse | 203 | 1967 |
| 5 | [AGTHERM](https://www.tamtam.ai/c/agtherm) (agtherm.com)
Independent small-medium enterprise specializing in climate engineering and energy performance, offering work and maintenance services in tertiary, industrial, pharmaceutical, and hospital sectors. | Construction | 馃嚝馃嚪 Colomiers | 188 | 2003 |
| 6 | [SCAM TP](https://www.tamtam.ai/c/scam-tp) (scam-tp.com)
SCAM TP is an independent SME specialized in water services, including network construction, maintenance, and operation, with a focus on quality, safety, and sustainability | Construction | 馃嚝馃嚪 Garidech | 164 | 1995 |
| 7 | [GBMP B芒timent](https://www.tamtam.ai/c/gbmp-batiment) (groupe-gb.fr)
Provides general contracting, structural masonry, turnkey design-build services, building rehabilitation, and energy performance maintenance for residential, industrial, and tertiary sectors in the Occitanie region. | Construction | 馃嚝馃嚪 Tournefeuille | 142 | |
| 8 | [BOURDARIOS](https://www.tamtam.ai/c/bourdarios) (france.vinci-construction.com)
Building construction, renovation, and maintenance of various structures like offices, housing, hotels, and historic monuments, including asbestos removal and interior fit-outs. | Construction | 馃嚝馃嚪 Toulouse | 133 | |
| 9 | [socotrap](https://www.tamtam.ai/c/socotrap) (socotrap.com)
Regional SME with 60 years of experience in construction specializing in industrial buildings, housing, and public projects in Toulouse and surrounding region | Construction | 馃嚝馃嚪 Ramonville-Saint-Agne | 120 | 1954 |
| 10 | [GIESPER](https://www.tamtam.ai/c/giesper) (giesper.fr)
GIESPER specializes in construction and real estate, with activities in public works, building, and real estate development | Construction | 馃嚝馃嚪 Balma | 114 | 1932 |
| 11 | [Gregori International](https://www.tamtam.ai/c/gregori-international) (gregori-international.com)
A family-owned company with over 40 years experience in constructing high quality landscaping, sports fields, stadiums, equestrian grounds, and golf courses worldwide | Construction | 馃嚝馃嚪 Saint-Jory | 105 | 1971 |
| 12 | [Groupe CLIMATER](https://www.tamtam.ai/c/groupe-climater) (groupe-climater.com)
Design, maintain, and operate climate engineering installations for industry, healthcare, housing, commerce, offices, and public facilities with local autonomy. | Construction | 馃嚝馃嚪 Toulouse | 101 | 1989 |
| 13 | [C2F Travaux ferroviaires](https://www.tamtam.ai/c/c2f-travaux-ferroviaires)
Specialists in railway catenary works and safety, prioritizing human values like trust, responsibility, and teamwork, for a strong company culture | Construction | 馃嚝馃嚪 Castanet-Tolosan | 101 | 2015 |
| 14 | [MATEOS ELECTRICITE](https://www.tamtam.ai/c/mateos-electricite) (mateos-elec.fr)
A family-owned company in Toulouse and Bordeaux, providing tailored solutions for energy infrastructure, buildings, and commercial properties through a range of technical services | Construction | 馃嚝馃嚪 Fenouillet | 91 | 1992 |
| 15 | [Groupe GB](https://www.tamtam.ai/c/groupe-gb) (groupe-gb.fr)
This company is an independent leader in construction and real estate in Occitania, providing comprehensive building services, interior design, and environmental solutions. | Construction | 馃嚝馃嚪 Launaguet | 85 | 1998 |
| 16 | [Stibat Groupe](https://www.tamtam.ai/c/stibat-groupe) (stibat.fr)
Group of specialized construction entities focusing on building works, small renovations, deep foundations, and private housing renovations with strong team values. | Construction | 馃嚝馃嚪 Toulouse | 77 | 1987 |
| 17 | [SOPRECO - Groupe Quatre +](https://www.tamtam.ai/c/sopreco-groupe-quatre) (sopreco.fr)
General building company specializing in construction, rehabilitation, and civil engineering with strong focus on quality, ethics, and client respect. | Construction | 馃嚝馃嚪 Lab猫ge | 73 | 1958 |
| 18 | [Cegelec Occitanie Tertiaire](https://www.tamtam.ai/c/cegelec-occitanie-tertiaire) (cegelec-occitanie-tertiaire.fr)
Design and installation of electrical systems for buildings, supported by an in-house engineering office and experienced field teams. | Construction | 馃嚝馃嚪 Toulouse | 70 | |
| 19 | [ROUZ脠S GROUPE](https://www.tamtam.ai/c/rouzes-groupe) (rouzes.com)
Designing and manufacturing adaptable partitions for office spaces, enhancing comfort, confidentiality, and modularity for evolving work environments. | Construction | 馃嚝馃嚪 Saint-Sulpice-sur-L猫ze | 65 | 1978 |
| 20 | [DEMATHIEU BARD CONSTRUCTION SUD-OUEST](https://www.tamtam.ai/c/demathieu-bard-construction-sud-ouest) (demathieu-bard.fr)
Conception, construction, and rehabilitation of residential, functional, and industrial buildings Implements innovative construction techniques and supports local resources Operates in Nouvelle Aquitaine and Occitanie | Construction | 馃嚝馃嚪 Toulouse | 62 | 1861 |
| 21 | [SOCAT](https://www.tamtam.ai/c/socat)
A Toulouse-based independent company specializing in water and environmental construction, trusted by public and private clients for water infrastructure projects | Construction | 馃嚝馃嚪 Villeneuve-Tolosane | 61 | 1977 |
| 22 | [Tunzini Sud-Ouest](https://www.tamtam.ai/c/tunzini-sud-ouest) (tunzini-sudouest.fr)
Design, implementation, and technical management of heating, ventilation, air treatment, energy production, plumbing, automation, and energy audits for various sectors. | Construction | 馃嚝馃嚪 Plaisance Du Touch | 60 | |
| 23 | [EXECO](https://www.tamtam.ai/c/execo-toulouse) (exe-eco.fr)
Since 2013, we provide effective collaboration and professional support to architects and public/private clients in both project design and construction | Construction | 馃嚝馃嚪 Toulouse | 44 | 2013 |
| 24 | [SCLE SYSTEMES POUR LE FERROVIAIRE ET L'ENERGIE, PAR ABREVIATION SCLE SFE](https://www.tamtam.ai/c/scle-systemes-pour-le-ferroviaire-et-l-energie-par-abreviation-scle-sfe)
Construction company specializing in systems for railway and energy sectors located in Toulouse, France | Construction | 馃嚝馃嚪 Toulouse | 36 | |
| 25 | [MECOWORKS](https://www.tamtam.ai/c/mecoworks) (mecoworks.com)
Your trusted partner for renewable energy production services | Construction | 馃嚝馃嚪 Saint-Lys | 35 | 2009 |
| 26 | [Groupe CARR脡](https://www.tamtam.ai/c/groupe-carre) (carre-sa.com)
The company specializes in metalwork, aluminum joinery, and locksmithing, offering a range of services including design, production, and maintenance for various projects | Construction | 馃嚝馃嚪 Tournefeuille | 29 | 1991 |
| 27 | [Soconer](https://www.tamtam.ai/c/soconer) (soconer.fr)
Since 2011, we help clients design energy solutions for buildings, focusing on efficiency, sustainability, comfort, and overall project success | Construction | 馃嚝馃嚪 Toulouse | 27 | 2011 |
| 28 | [CONSTRUCTIONS SAINT-ELOI - Entreprise de G茅nie M茅tallique](https://www.tamtam.ai/c/constructions-saint-eloi-entreprise-de-genie-metallique) (saint-eloi.eu)
A company with 40 years of experience in tubular and three-dimensional metal construction, metalworking, and metal-textile structures with multiple locations across France | Construction | 馃嚝馃嚪 Colomiers | 25 | 1989 |
| 29 | [Global Expertises](https://www.tamtam.ai/c/global-expertises) (global-expertises.fr)
A building and construction expert firm offering technical analysis of building issues, dispute resolution, renovation advice, and legal procedure support | Construction | 馃嚝馃嚪 Toulouse | 25 | 2021 |
| 30 | [Les Couvreurs Occitans](https://www.tamtam.ai/c/les-couvreurs-occitans) (couvreurs-occitans.fr)
A team of roofers and solar panel installers in Toulouse dedicated to satisfying customers by doing what they love with an ethical approach | Construction | 馃嚝馃嚪 Toulouse | 24 | 2012 |
## How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 11, 2026.
## More company lists in the Haute-Garonne department
- [The largest companies in the Haute-Garonne department](https://www.tamtam.ai/l/largest-companies-haute-garonne) (2,406)
- [Companies with in-house R&D in the Haute-Garonne department](https://www.tamtam.ai/l/r-and-d-companies-haute-garonne) (323)
- [Multinational companies in the Haute-Garonne department](https://www.tamtam.ai/l/multinational-companies-haute-garonne) (246)
- [Retail chains in the Haute-Garonne department](https://www.tamtam.ai/l/retail-chains-haute-garonne) (222)
- [Professional services firms in the Haute-Garonne department](https://www.tamtam.ai/l/professional-services-firms-haute-garonne) (208)
- [Aerospace and defence companies in the Haute-Garonne department](https://www.tamtam.ai/l/aerospace-and-defense-companies-haute-garonne) (186)
- [Manufacturers in the Haute-Garonne department](https://www.tamtam.ai/l/manufacturers-haute-garonne) (159)
- [IT services companies in the Haute-Garonne department](https://www.tamtam.ai/l/it-services-companies-haute-garonne) (158)
- [IT Services and IT Consulting companies in the Haute-Garonne department](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-haute-garonne) (152)
- [SaaS companies in the Haute-Garonne department](https://www.tamtam.ai/l/saas-companies-haute-garonne) (147)
- [Consulting firms in the Haute-Garonne department](https://www.tamtam.ai/l/consulting-firms-haute-garonne) (145)
- [Software Development companies in the Haute-Garonne department](https://www.tamtam.ai/l/software-development-companies-haute-garonne) (140)
- [Hardware manufacturers in the Haute-Garonne department](https://www.tamtam.ai/l/hardware-companies-haute-garonne) (137)
- [Public sector organisations in the Haute-Garonne department](https://www.tamtam.ai/l/public-sector-organisations-haute-garonne) (111)
- [Business Consulting and Services companies in the Haute-Garonne department](https://www.tamtam.ai/l/business-consulting-and-services-companies-haute-garonne) (104)
- [Real Estate companies in the Haute-Garonne department](https://www.tamtam.ai/l/real-estate-companies-haute-garonne) (104)
- [Aviation and Aerospace Component Manufacturing companies in the Haute-Garonne department](https://www.tamtam.ai/l/aviation-and-aerospace-component-manufacturing-companies-haute-garonne) (102)
- [Distributors and wholesalers in the Haute-Garonne department](https://www.tamtam.ai/l/distributors-and-wholesalers-haute-garonne) (98)
- [Education providers in the Haute-Garonne department](https://www.tamtam.ai/l/education-companies-haute-garonne) (94)
- [Family-owned companies in the Haute-Garonne department](https://www.tamtam.ai/l/family-owned-companies-haute-garonne) (72)
- [Financial services firms in the Haute-Garonne department](https://www.tamtam.ai/l/financial-services-firms-haute-garonne) (70)
- [Higher Education companies in the Haute-Garonne department](https://www.tamtam.ai/l/higher-education-companies-haute-garonne) (66)
- [Critical infrastructure operators in the Haute-Garonne department](https://www.tamtam.ai/l/critical-infrastructure-operators-haute-garonne) (64)
- [Retail companies in the Haute-Garonne department](https://www.tamtam.ai/l/retail-companies-haute-garonne) (63)
## The same list elsewhere in France
- [Construction companies in France](https://www.tamtam.ai/l/construction-companies-france) (2,209)
- [Construction companies in 脦le-de-France](https://www.tamtam.ai/l/construction-companies-ile-de-france) (556)
- [Construction companies in Auvergne-Rh么ne-Alpes](https://www.tamtam.ai/l/construction-companies-auvergne-rhone-alpes) (372)
- [Construction companies in Provence-Alpes-C么te d'Azur](https://www.tamtam.ai/l/construction-companies-provence-alpes-cote-dazur) (202)
- [Construction companies in Grand Est](https://www.tamtam.ai/l/construction-companies-grand-est) (196)
- [Construction companies in Nouvelle-Aquitaine](https://www.tamtam.ai/l/construction-companies-nouvelle-aquitaine) (177)
- [Construction companies in Pays de la Loire](https://www.tamtam.ai/l/construction-companies-pays-de-la-loire) (141)
- [Construction companies in the Rh么ne department](https://www.tamtam.ai/l/construction-companies-rhone) (140)
- [Construction companies in Occitanie](https://www.tamtam.ai/l/construction-companies-occitanie) (133)
- [Construction companies in the Hauts-de-Seine department](https://www.tamtam.ai/l/construction-companies-hauts-de-seine) (113)
- [Construction companies in Hauts-de-France](https://www.tamtam.ai/l/construction-companies-hauts-de-france) (108)
- [Construction companies in Brittany](https://www.tamtam.ai/l/construction-companies-brittany) (92)
- [Construction companies in Normandy](https://www.tamtam.ai/l/construction-companies-normandy) (92)
- [Construction companies in the Bouches-du-Rh么ne department](https://www.tamtam.ai/l/construction-companies-bouches-du-rhone) (91)
- [Construction companies in the Gironde department](https://www.tamtam.ai/l/construction-companies-gironde) (67)
- [Construction companies in the Val-de-Marne department](https://www.tamtam.ai/l/construction-companies-val-de-marne) (63)
- [Construction companies in the Loire-Atlantique department](https://www.tamtam.ai/l/construction-companies-loire-atlantique) (57)
- [Construction companies in the Seine-et-Marne department](https://www.tamtam.ai/l/construction-companies-seine-et-marne) (57)
- [Construction companies in the Essonne department](https://www.tamtam.ai/l/construction-companies-essonne) (56)
- [Construction companies in the Is猫re department](https://www.tamtam.ai/l/construction-companies-isere) (52)
- [Construction companies in Bourgogne-Franche-Comt茅](https://www.tamtam.ai/l/construction-companies-bourgogne-franche-comte) (50)
- [Construction companies in the Yvelines department](https://www.tamtam.ai/l/construction-companies-yvelines) (50)
- [Construction companies in the Bas-Rhin department](https://www.tamtam.ai/l/construction-companies-bas-rhin) (49)
- [Construction companies in Paris](https://www.tamtam.ai/l/construction-companies-paris) (112)
---
Source: https://www.tamtam.ai/l/construction-companies-haute-garonne