Translation:The new occupant sees his neighbors.
An occupant is someone who occupies a place. It does not mention if you are paying rent or not. You can be in a motor home or any vehicle as well as in a building. I would not use the word “lodger” or “tenant” in a trailer park. http://www.learnersdictionary.com/definition/occupant
When nouveau is followed by a word starting with a vowel or a mute h, it is changed to nouvel.
Always put your entire sentence, I didn’t catch that you meant for English. Try reporting it as also correct for the translation from Spanish to English if the rest of your sentence was exactly the same as above.