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Tenancy agreements are a big part of room rental, and are the first thing you should have in place when welcoming new tenants, there need is to create an agreement between you the Landlord and the Tenant/Lodger. These agreements will help ensure the tenancy runs smoothly and sets out the rent required, the deposit needed, the term of the tenancy, the required notice period to end the tenancy, an inventory of owner possessions etc. This agreement should also outline the commitment of the tenant with terms like: To pay rent on time, not to damage the property, to keep your room in a good clean state, not to become an annoyance to the owner etc and lets the tenant know what's expected of them so they can enjoy their tenancy. If any future disputes happen refer the tenant back to the tenancy agreement without one the tenant may say I don't remember agreeing to that.
Always read tenancy agreements fully so you understand what's written in them and sign both copies, you then keep one copy and the tenant keeps the other.
A lodger agreement is best for landlords who let out rooms in their own furnished home, where both parties will agree on a period of tenancy and these agreements will normally have an early termination clause meaning if the lodger or you the landlord want to end the tenancy early this clause would state the amount of notice that needs to be given. This will give landlords more freedom and flexibility towards their own home and let the tenant know what is required of them and rules they have to abide by to keep the agreement valid.
If your a non resident landlord letting out rooms in a property read below
An assured shorthold tenancy agreement is the most commonly used Tenancy Agreement and is used where you are renting rooms or a whole property where you the landlord doesn't live. These agreements will have a stated period of tenancy, and can be ended after the relevant notice on the agreement is given, but can only be ended earlier than the initial period if the tenant and the landlord both agree or clauses in the contract are broken. These also give tenants piece of mind and privacy as the landlord should ask the tenants permission before he or she enters the premises, giving the required notice.