Chartered Land Surveyor in Groslay: TT Géomètres Experts Paris Nord Groslay
Are you looking for a chartered land surveying firm for a project in northern Paris? TT Géomètres Experts Paris Nord Groslay meets your needs throughout Val-d’Oise and the Île-de-France region.
Looking for a Chartered Land Surveyor in Val-d’Oise? Contact TT Géomètres Experts

TT Géomètres Experts Paris Nord Groslay
4, rue René Dubos95410 Groslay
Your Local Partner for your Projects
Specialists Serving Individuals, Businesses and Local Authorities
Our Paris Nord Groslay office supports you throughout all your projects. Individuals and co-owners, businesses, local authorities, social housing providers and property developers can benefit from the support and expertise of our local team. Led by Sonia and Laurence, the team comprises around 20 employees, including two project managers.
Your Contacts in Paris Nord Groslay

Sonia MORGADO LOPES
A Chartered Land Surveyor registered with the French Order of Chartered Land Surveyors under no. 06499 and a 2004 graduate of the École Spéciale des Travaux Publics (ESTP), Sonia Morgado Lopes is Head of the office. With 22 years of experience, Sonia supports clients with all types of land and property projects.
LinkedIn Profile
Laurence LAGARRIGUE
A Senior Surveyor with 37 years of experience, including 33 years with TT Géomètres Experts, Laurence Lagarrigue is Deputy Head of the office. Laurence specialises in work in confined spaces and supports clients with a wide range of projects.
Rapid Response in Northern Paris and Île-de-France
Our teams of surveyors respond quickly across a wide area, primarily covering Val-d’Oise, Seine-Saint-Denis and, more broadly, northern Île-de-France, depending on your needs and projects. Our Groslay office is part of a network of seven offices in Île-de-France, enabling us to operate throughout the entire region.
Discover our network of local officesOur Land, Engineering and Surveying Services in Val-d’Oise
- Land surveying: boundary surveying, subdivision and property boundary demarcation
- Urban planning (PLU amendments and revisions, subdivisions)
- Creation of building plots
- Co-ownership and property volume division
- Interior plans and architectural surveys (façades, roofs, sections)
- BIM models and 3D laser scanning
- Topographic and aerial surveys (drone, LiDAR, photogrammetry, multispectral), surveys in confined spaces (sewers, basements, technical galleries) and aquatic surveys using bathymetric drones
- Utility detection (fibre, electricity, telecoms, stormwater, wastewater, gas, drinking water, sprinkler systems and agricultural drainage)
- Surveys in confined spaces (sewers, basements, technical galleries)
- Setting out (buildings, sports facilities, roads, utility networks)
Why Choose Our Office?
Our teams bring more than 26 years of field experience:
2000
Opening of the Sarcelles office (95)
2003
Opening of the Sevran office (93) following the acquisition of the assets of Consult Infra
2022
Opening of the Paris Nord office following the merger of the Sevran (93) and Sarcelles (95) offices
1 January 2024
Acquisition of the assets of the LESEUL practice, based in Ézanville (95) and Stains (93)
Certifications and Labels
The profession of chartered land surveyor is regulated in France. Our cooperative company has been registered with the French Order of Chartered Land Surveyors for over 60 years. All our offices are also ISO 9001 certified, and for more than 10 years we have held two CSR labels at confirmed level: Engagé RSE and RSE SCOP BTP. Our company is also a member of the FNEDRE (French National Federation of Underground Utility Detection Companies) and is certified in georeferencing and utility detection. Our teams also hold numerous professional certifications and authorisations (CATEC, Chemical Risks, HEBE, Radiation Protection and ATEX), enabling them to work in a wide range of environments, including confined spaces, industrial sites and nuclear facilities.
For our drone operations, our teams include qualified professional remote pilots who are trained and hold the certifications required by current regulations. Our company is approved by the French Civil Aviation Authority (DGAC) and the relevant prefectures to operate under all authorised flight scenarios.
State-of-the-Art Equipment: 3D Laser Scanners, Drones and Utility Detection Technology

Our teams are equipped with 3D laser scanners (static and mobile) and drones (photogrammetry, LiDAR and multispectral), enabling fast, accurate surveys tailored to even the most complex environments. These innovative technologies ensure reliable data acquisition to meet the technical requirements of each project.
Our teams also use advanced utility detection solutions, providing reliable and efficient investigations even in the most challenging environments. This equipment enables the precise location of underground utilities, helping to improve site safety and meet the specific technical requirements of each project.




