A residential sublease agreement

A residential sublease agreement (also sometimes known as a sublet agreement) is required and used when a tenant who is renting out a property wishes themselves to rent out that property to someone else again. The lease grants the first tenant the property rights to be able to offer a sublease to another party. The sublease agreement can be used on almost any property, from apartments, condominiums and houses to up to and including garages and even parking spaces. In general, such subleases do not require the consent of the original landlord, unless the original lease actually states that subleasing is prohibited (although this is not the case for everywhere and you should at least check before attempting to sublease without notifying the original landlord!).
It is advisable however, even if you are legally allowed to do so, to at least consult the original landlord on the issue in order to prevent any unpleasantness. If you are leasing a property and considering subletting yourself, it is important to note that any damage done to the property by your sublease will, as far as the original landlord is legally concerned, be your responsibility to ensure payment for. You will also be required to keep up your original rental agreement to the landlord, even if the person you are subleasing the property fails to live up to their obligations to pay you the agreed to rental money on time. There are exceptions to this, however; If the sublease agreement is that of an Express Assumption Agreement, that makes the sub-lessee responsible to the landlord. If you are in the position of leasing from someone who is already leasing, it is important to remember that the original landlord maintains the right to terminate the original lease, which will in turn terminate your sublease whether you like it or not.
There can be many reasons why a leaser would decide to sublet their property. Many tenants can often find the property they are leasing is too big for them or has space which they themselves do not use — such as the garage etc — and thus subleasing that room to someone else makes sound financial sense (particularly in the current tough economic climate) and could even help to assist them in paying their own original lease agreement.
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