Architect N. N. Ievsky was born in 1740 in the village of Gryazi in the Lipetsk district of the Tambov province, which is now within the city limits of Gryazi, in a noble family.

In 1753 and 1759, he studied at the famous architectural school of D. V. Ukhtomsky in Moscow.

From 1754 to 1771, N. N. Ievsky worked in Moscow, serving in the "Commission for Stone Construction of St. Petersburg and Moscow" and the Hof-Intendant Office. Under the guidance of V. I. Bazhenov, he participated in the design of the Kremlin Palace and the creation of its model.

In 1771, holding the title of "collegiate assessor with the rank of land major," N. N. Ievsky retired and settled in the village of Gryazi.

In 1773, he returned to service after the fire in Voronezh on August 10, 1773, and developed a project for the city's restoration. After revisions by the St. Petersburg architect I. E. Starov, the general plan for Voronezh was approved by Catherine II on March 11, 1774.

In 1773 and 1775, N. N. Ievsky worked as an architect in Voronezh on a contract basis, and then became the provincial architect. He was the first architect of Voronezh and was responsible for designing new streets, expanding and straightening old ones, as well as issuing permits and plans for the construction and reconstruction of houses.

In 1777-1778, he developed standard projects for district administrative buildings, such as the office, treasury, and storage, for cities in the Voronezh province.

N. N. Ievsky worked in the Baroque style, and several state and private buildings were constructed in Voronezh according to his designs. Among them are the governor's house of General-Poruchik I. A. Potapov (around 1780), the mansion of the viceroy E. A. Shcherbinin (1782, no longer exists), a stone shop for salt and a soldiers' school (1776), the "big line" of 255 stone shops (1779), and the house of the apothecary Zeger, built according to a "model" project (1779).

From 1781, N. N. Ievsky was an assessor of the provincial criminal court. In the same year, he participated in the delineation of the Tula, Ryazan, and Voronezh provinces and the compilation of topographic maps.

N. N. Ievsky passed away on March 12, 1797, in Voronezh.