You have to notify the landlord for not renting the house say, 1 month's notice, before the expiry of the tenancy agreement. It is better for you to tell the landload to come up to the premises to check for any terms that you have to observe in the tenancy e.g. the decoration, the structure of the premises, the lights and furniture, if any, if these have been stated in the tenancy agreement. After checking, you should give back the door keys to the landload for the formal handover of the premise to the landlord. The landlord should then give you a refund of the rental deposit you had paid when the tenancy agreement was signed.