By the end of 1975, Yannos Yanniotis along with Youssouroum Noah and Pechlivanidis Stellios established their Architectural Office at 39 Kleomenous Street in Kolonaki-Athens. In 1978 they founded a Company and erected as contractors the Multi-storey Office Building at 29 Mhalakopoulou Avenue.
In November 1978 Constantinos Yanniotis was born.