He studied at Lviv Polytechnic and spent a significant part of his professional career in Lviv. He was known for employing a variety of architectural styles, including Art Nouveau, Neo-Gothic, Neo-Renaissance, and Neoclassicism. After completing his studies, he worked on numerous projects in Lviv, the most famous of which is the complex of income-generating buildings on Ivana Franka Street, Nos. 46, 48, 50, 52, and 54, constructed between 1909 and 1912.
One of his most remarkable projects is building No. 50, known as the “House with Dragons” (1912). This structure stands out for its refined facade decoration, which blends elements of Romanesque and Byzantine styles, transformed according to the principles of Art Nouveau. A particularly striking feature is the curvilinear attic adorned with sculptures of fantastic dragons with bat-like wings, created by sculptor Ivan Severa.
Varteresevych-Slonevskyi’s architectural style was distinguished by a bold combination of traditional and modern elements, making his works unique within the architectural landscape of Lviv at the time.