On the website there is a register as SRO in the field of construction (https://sro.gosnadzor.ru/), and their members (https://sro.gosnadzor.ru/SroMembers/Members). In the last it is possible to check information not only on existence at the organization of the certificate SRO and its status, but also about types of works on which it is given out, their maximum cost under one contract.
Besides, the part of this information can be found on the official website of SRO.