Do you feel the neighboring property is directly affecting your subject's market value ? Is there another disheveled or challenged property like this one, across the street, or further down the street ? Take your subject's front and street view photos at such an angle as to include this neighbor's place, say nothing in your text about it, unless you are certain of a direct influence upon subject value (ie. several failed for-sale listings on the subject, because of the neighbor's place). Just put a label icon on the photo pointing to the SUBJECT house so the reader sees the other place next door, as well. You may need to say nothing un-nice about it after all. Let the pictures do your talking. Is that not a prime asset to the street scene photo anyway ?