Kelly, welcome to the forum. One thing you will never find here is a shortage of opinions.
You're the appraiser, figure it out. I kid
I can not comment about your market, but can tell you about my thoughts on mine.
Yes, I think it has a contributory value. New things often do. I doubt I'd make a line item adjustment for it, but I'd sure consider it when making my condition rating. Just like I would if they had just replaced the roof.
As has already been mentioned and will probably be mentioned again; if there are no comps in the neighborhood, you can always abstract an adjustment from comps in a different but similar area if that is the route you want to go.
As usual, I agree the Terrel. Darn it Terrel, can you quit being so darn agreeable all the time? I came here looking for a good argument.
I just met my new neighbor up on the corner yesterday who is building a house. I was curious what she paid for the site and was to lazy to go look it up (about an acre with a 2 section MF house that was removed). When she told me, I was surprised because it was about $10K under market. She told me she got the place so cheap because the septic was bad and would require replacement. I paid about $5K for my own system about ten years ago. I estimate the balance of her discounted purchase price was due to the fact the 2 section MF house required demolition and removal.