Yes, you are. If you are planning on inviting friends to visit please make sure you inform your housemates and remind your guests to be considerate of other people in the accommodation. Also, be aware that you are liable for your guests on site. This means that if they cause any damage or are a nuisance whilst on site you will be held responsible.
Please remember to sign your guests in, so that if there is an emergency we know that everyone is accounted for.