A couple years ago, some friends and I visited the house that the interior scenes of the two movies in the 'It' reboot series were shot at.
The front door was left unlocked, so entry was relatively easy. The building itself ended up being quite unremarkable other than the history and fame attached to it. There were tools left in the basement, and I believe that the building is being converted into a women's shelter. It is under construction as of fall 2020, and is likely no longer accessible.
A friend and I took some photos of the house, which can be viewed in this Flickr album:
https://flic.kr/s/aHsmWLKWq7