Gst limits depending upon on the state which your are transacting, some states 10 lakhs limit,some states 20 lakhs and few states like andhra pradesh having the limits for services 20 lakhs and exclusive supply of goods limit is 40 lakhs
As per Section 22 of CGST Act it's 20 lac threshold limit for supply of services & in term of Schdule 2 , Para 5 , Renting of Immovable property cover under supply of services.