Building permission for the Greater Hyderabad Municipal Corporation (GHMC) involves obtaining necessary approvals before commencing construction or making alterations to a building. This process ensures adherence to building by-laws, land use regulations, and safety standards. It typically involves registering the building plan through TS-bPASS (Telangana State Building Permission Approval and Self-Certification System), submitting the approved plan, paying applicable fees, and potentially obtaining No Objection Certificates (NOCs) from relevant authorities.