In 1741, when Elizabeth of Russia came to power and pardoned all involved in Volynsky trial, Blanks were allowed to return home; they took Kokorinov with them and left for Moscow.

[citation needed] Karl Blank and Alexander Kokorinov joined state construction crews led by Ivan Korobov and Pyotr Obukhov.

By 1749, Karl passed junior architects' exams to the panel presided by Bartolomeo Rastrelli and was appointed as an assistant to Alexey Yevlashev.

Rastrelli supervised Blank's early career and instructed him to plan restoration and expansion drafts for the main cathedral of the New Jerusalem Monastery.

[citation needed] In the 1780s, Blank quit independent construction management and became a consultant in landscaping and interior design; his advice was sought after by the wealthiest nobles.

Notably, he consulted count Pyotr Sheremetyev on Kuskovo a palace project, and personally designed the Hermitage and Dutch house pavilions.