Those are storage sheds. They were popular in soviet times (usually two-stories high), but I struggle to find any respectable reference. 

Only found this article (ru) describing similar structures in Yakutsk
https://sakhaday.ru/news/ot-stalinok-do-obkomovskih-domov-ili-zachem-nuzhny-kamennye-kladovki-v-centre-yakutska

I think they are correctly tagged, and this note might be closed.