An accomplished eclecticist, Pomerantsev practiced Art Nouveau, Byzantine, Russian Revival styles and collaborated with leading structural engineers of his period in creating new types of commercial buildings.

[1] In 1889 Pomerantsev won an open competition[2] to design the Moscow Upper Trading Rows (now GUM) on Red Square, his first large, and perhaps his most conspicuous project.

According to William Craft Brumfield, "that the enormous Upper Trading Rows functioned, if imperfectly, is a tribute both to Shukhov's design and to the technical proficiency of Russian architecture toward the end of the century.

"[3] Critics noted disjunction of functional concrete and steel structure and elaborate Russian Revival styling that consumed 40 million bricks.

[4] While upper floor galleries benefited from Shukhov's skylights, lower level suffered from inadequate ventilation, and, as a result, demand for shop space in the building did not meet the expectations.

[8] Station designs by Pomerantsev mixed motifs of Vienna Secession, Victorian Gothic and traditional eclecticism leaning to neoclassicism yet were clearly styled as a cohesive ensemble.

[9] Pomerantsev lost the 1893–1894 competition for the Alexander Nevsky Cathedral in Warsaw to Leon Benois; both architects filed Russian Revival proposals, however, Pomerantsev leaned to "red brick" churches of Alexander II period covered with ornamental cliches and crowned with Thon-styled dome; draft by Benois was a refined nod to Vladimir Rus architecture.

[9] In 1934 Arkady Mordvinov and Alexey Dushkin proposed conversion of the unfinished cathedral into the Radio House skyscraper;[13] the plan never materialized and the dilapidated concrete shell was torn down in 1952.