You have a right to begin eviction proceedings against your tenants. In some cases, you may have to have reasons for evicting a tenant. In other cases, you will simply have to follow the correct legal process.
Your tenants are expected to ensure your property is kept in a good state of decoration. This means that the tenant is expected to make sure the property is clean and ventilated. You can take legal action against your tenants if you believe you should be compensated for any damage caused to the property by your tenants.
Your tenancy agreement can give you additional rights, beyond those afforded to you in legislation. When drawing up a tenancy agreement, remember that any terms which are seen to be unfair are unenforceable.