If the sub-lessee pays rent equal to or lower than the rent payable to the original owner, the recognized schools agree on permissibility where sub-leasing itself is allowed.
The lessee is then using his lawful right of usufruct and passing that use onward under a permitted sub-lease.
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Leasing (إجارة): Sub-Lease, Assignment and Ijarah Certificates
If the sub-lessee pays rent equal to or lower than the rent payable to the original owner, the recognized schools agree on permissibility where sub-leasing itself is allowed.
The lessee is then using his lawful right of usufruct and passing that use onward under a permitted sub-lease.