A sublease rents your rental to someone else while YOUR lease stays in force — you remain fully liable to the landlord. Legality depends on your lease’s sublet clause and often the landlord’s written consent.
Subleasing puts a tenant under your tenancy: the subtenant pays you, you keep paying the landlord, and — the part people miss — you remain fully on the hook. Damage, unpaid rent, lease violations by your subtenant: your name answers for all of it, and the landlord’s remedies run against you. Whether you can sublet at all lives in your lease: clauses range from outright bans to "with landlord’s written consent," and some jurisdictions add tenant-friendly rules (like consent not being unreasonably withheld). Sublet against a prohibition and you hand the landlord grounds for eviction. Do it right: get consent in writing, screen the subtenant like a landlord would, and put a written sublease between you covering rent, term, and damage responsibility.
Yes — your lease with the landlord remains fully in force, so their damage and unpaid rent land on you. Your recourse is against the subtenant under your sublease.
A sublease keeps you on the lease with a tenant under you; an assignment transfers the lease entirely to someone else — different clauses, different consent rules.
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