He first went to Constantinople, where he apprenticed with some of the masters and architects from Madytos, and then left for Athens, his skill and honesty made him one of the renowned contractors of that era, who undertook the construction of large buildings, thus acquiring considerable wealth.

They were hosted at his home on Methonis street and he cared for them to be hospitalized in the Evangelismos Hospital, [1] to which he had bequeathed part of his big fortune, on the condition that there would always be two free beds available for Madytians needing treatment.

[citation needed] Lazaros Sarantoglou was one of the personal and political friends of the politician and Mayor of Athens Dimitrios Kallifronas.

[2] Great appreciation was also shown by Sarantoglou to the then Archbishop of Athens and all Greece Chrysostomos Papadopoulos.

[3] His heirs, in his memory, further donated a large amount of money for the completion of the church of St. John the Baptist in Nea Madytos of Thessaloniki.