The ORD corpus is one of the largest resources of contemporary spoken Russian. By 2014, its collection numbered about 400 h of recordings made by a group of 40 respondents (20 men and 20 women, of different ages and professions), who volunteered to spend a whole day with a switched-on voice recorder, recording all their verbal communication. The corpus presents the unique linguistic material recorded in natural communicative situations, allowing spoken Russian and the everyday discourse to be studied in many aspects. However, the original sample of respondents was not sufficient enough to study a sociolinguistic variation of speech. Thus, it was decided to launch a large project aiming at the ORD sociolinguistic extension, which was supported by the Russian Science Foundation. The paper describes the general principles for the sociolinguistic extension of the corpus.