1963 – Foundation of the technical office of Konstantinos Karantinos (based in Athens) that specialized on the design and construction of private building projects.
1965 – Foundation of K.KARANTINOS LTD specializing on the design and construction of industrial projects.
1972 – Six Civil Engineers decide to combine their business and technical activities to establish EXAS SA undertaking large technical projects in Greece and abroad.
In addition to other projects a keystone element was the invitation and participation of EXAS S.A. in the biding for the construction of the second phase of the terminal of the airport in Damascus, Syria.
1976 –K. KARANTINOS leaves the EXAS S.A. and establishes INTERDOMI S.A. in cooperation with N. Papadakis a Civil Engineer. There he holds 50% of the shares and the position of chairman and CEO. INTERDOMI SA continues its successful history of K. Karantinos building large and special PROJECTS such as ΚΑΤΕΕ & ΚΕΚΑΤΕ of Ioannina.
1986 – Foundation of INTEKKAT S.A., a company that performs construction projects of all categories. In the same year and LIBRO D 'ORO is also established to develop and build resorts on proprietary land initially on the island Kefalonia and later extended all around Greece.
During all these years, the Technical Office of K. KARANTINOS remains constanlty active, having built offices, apartments and shopping centers summing up to more than 15.000 sq.m.
1987 - K. Karantinos develops commercial and technical cooperation with ARFAPI - CHIOMI group as well as with J&P in which he participated for more than five years with the general contracting degree of 4th class while offering services in the development as a consultant and director.
At the same time K. Karantinos offers services in the field of aquaculture projects in the group of J&P in Libya.
2003 - The companies of the group are supported by the participation of young civil engineers N. Karantinou and A. Karantinou, who have also been working abroad in both Balfour Beatty and within the group AKTOR and J&P.
2010 - Civil engineers Kostantinos, Nicholas & Alexander Karantinos establish KARANTINOS S.A. for design and construction of public and private projects of all categories in both Greece and abroad.