I grew up not far away on a side street by channel 40 which is on liberty street and I know 3 families that have lived on Piedmont St in Springfield, at least 2 are still there even though their kids are all now over 25 and have moved out. I was good friend with one girl & her family. So i hope you will benefit from what I have to share.
According to realtors that house is located in east spfld., but according to the City of SPFLD, Piedmont St is in the Liberty Heights section of town, which has gotten progressively worse since I was born in 1983, it includes the areas between the piedmont st house/ the high school property & Baystate hospital/Mercy hospital(map in link provided below). My mother still goes to the Hungry Hill community meetings to get updates from police & neighbors about the goings on of the area & what to do to prevent issues, etc. If you don't live far away i recommend you attend a meeting & talk to people there, they have all lived in the area for a while & will have good insight for you. Meetings are the 3rd thursday of the month in the basement (back door) of Our Lady of Hope Church on Armory St. The contact info is at the top of the web page that is linked below. you can call/email about what time it starts (Hungry Hill Neighborhood Council, President: Jeremiah Donovan, Staff: Mary Troy Phone: (413) 733-9411 Email: email@example.com)
I would also definitely call the east springfield neighborhood council to try & attend a meeting there as well (1st Tuesday of the month; Community police on 3rd Tuesday of the month). East Springfield picks up right next to Piedmont St. so it's important to check it out also. (East Springfield Neighborhood Council, President: Kathy Brown, Phone: 413.733.0390, Email: firstname.lastname@example.org) The Neighborhood council has a storefront office on Page Boulevard between Ardmore St & Edendale St. I'm sure Kathy can provide you with the address. She has worked for the SPFLD police dept ever since i can remember and has CONSTANTLY been involved in her community, i.e. a GREAT resource. (I was friends with her youngest daughter in High school....)
If you go to any of those meetings i'm sure you will get a better sense of the area. i've also included a bit of info from my stand-point:
It's not a bad street, has a decent set of back roads connected to it that make a great bike riding/ dog walking area. there is an Elementary school that about 5-6 blocks away (it's a REALLY old building tho), one block away is the newer middle school (van sykle) and Springfield High(last resort high school for kids who aren't going to gradute from regular high school due to behavioral/performance/motivation issues). I have noticed a lot of kids lingering around waiting for public transportation mid-day... Next to that double school building is a Fire station/safety complex. There was a walking path cut thru to the street right next to the HS and i also think one to the woods behind the field that is behind the school. i recall Spfld Central high kids having keggars in those woods every weekend (but that was right b4 the safety complex went up). Carew St. can get very busy at times and some people use Piedmont to cut through more back roads to Greeney St to get to Liberty St / the plaza. I wouldn't be so worried about personal safety on the st, or worried about something being stolen. but I would be slightly concerned about where the neighborhood might stand in 10 years...
(I grew up in spfld, went to Spfld Central High 2001, Graduated from WNEC 2006, am currently in Chicopee, and am trying to buy a house in Agawam - I'm definetly NOT a real estate agent, just trying to help)