Depending on your type of contract and the agreed conditions, you can or cannot end your contract before the end date.
If your contract mentions a definite period, it is possible to cancel your contract with a one calendar month notice. This notice should be in writing and delivered through registered mail. If you are leasing an accommodation for an indefinite period, probably a minimum contract period is concluded. In that case, it is not possible to end the contract by yourself. However, it is possible to contact us and discussing the ending your contract pre-maturely.