Blight Here, Blight Now, Noe
Breaking news! Blight exists in Noe Valley AT THIS VERY MOMENT.
Now I know what you’re thinking — “how can you possibly detect blight without the advantage of retro-history and the assistance of Eric Fisher’s time machine?” By walking up Duncan between Church and Dolores:
Sometimes blight arrives because you don’t rebuild. Other times it comes around because you don’t finish. This site has been under construction for at least two years, and I don’t think any work has been done for about a year.
But how exactly do we know this is blight as opposed to procrastination? Easy:
Click to zoom for the commentary added by neighbors regarding Contractor “LOSER”.
“Tack down your tarps.”
“Your neighbors are getting pissed – you lock it down or we will.”
Peel back the blue tarp and you see old school Noe ready to roar.
Burrito Justice 
We lived around the corner from this eyesore for years. Every night the tarps go flapping around in the wind whistling down Twin Peaks and make a lot of noise. Ugh!
ha ha yeah. there’s a house across the street from me that has been renovating for at least three years, i think the dad of the family is a contractor. i believe they ran out of money for awhile, because between priming and painting the facade they had scaffold up and no action for over a year. strangely enough, it was a welcome respite from their usual double-parked duallys.
I live on the next block on Duncan & this site has been a problem for a couple years now, as you note. My guess is that the builder ran out of money, as well. The neighbors in the immediate area are not happy, and with good reason. The portatoilet has been set up there forever, and it smells gross when I walk past with my dogs. Unfortunately, this building is a testament to the failed side of the housing market in Noe. One does turn up on occasion.
I also live on the next block of Duncan. The site owners are no doubt pieces of shit. Not because they couldn’t afford to finish the job (and the flapping plastic is indeed ugly), but because they forced out the family that was living in the home that was eventually torn down to make way for this aborted get-rich scheme.
Having moved here 5 years ago from 26th and Valencia, it’s funny what passes for “blight” among my neighbors now.
If it bothers you that much, just burn it down.