About Thelcon

Thelcon is a dynamic technical & construction company with a high specialization in energy and environmental systems for buildings and industries.

Founded in 1999, the company has completed 20 years of continual growth in the buildings sector. Thelcon staff have decades worth of experience in energy planning and audits. The company services have already been used by nationally and internationally recognised bodies involved in energy related projects, such as the European Union, National Technical University of Athens, Greek Energy Regulatory Authority and others.

The company is also highly specialized in construction of automation control and building energy management systems (BEMS), with installations in large buildings and extended stores networks. Thelcon has also undertaken and carried out successfully technical projects for major groups of private companies, such as Mytilineos S.A., Piraeus Bank Group, Ahold Delhaize and others.

Addressing future services and building needs, Thelcon has developed an energy monitoring software platform for buildings and industries, aiming for optimization of energy conservation.

20 +

Years of experience

100 +

Completed projects




Electromechanical Studies

Studies for E/M systems such as heating & cooling, lighting, electrical and control systems in large buildings.

Specialized Constructions

Constructions in buildings. Installation of air conditioning, electrical, lighting, photovoltaic systems etc.


Supervision of building constructions for optimal completion, in accordance with respective specifications.

Our Projects

Thelcon has succesfully completed a number of challenging technical, environmental and energy related projects for leading companies and organizations, in Greece and worldwide.



Thelsoft is a web application for monitoring and control of consumption of energy & water, temperatures, and other environmental & energy data of the building.

Complete platform

Identify when and why energy is consumed, and areas where energy is wasted.

Custom solutions

Completely adaptable for each building and your specific needs.

Our aims

Projects aim at increasing energy efficiency in the buildings sector, maintaining optimal human conditions, leading to a greener future with reduced CO2 footprint and the least possible environmental impact.