Well, my answer isn't what most would answer, but old cop habits ya know. I would open enough to look around to make sure nothing looked afoul, call out to see if anyone was around, then if everything looked alright and if my spidey sense weren't raging, I would just close the door.
If anything seemed off in the slightest, not carrying a weapon anymore, I would pull off a short distance to be able to keep an eye on the premises to make sure I was a good witness if anyone came out, or anything happened, and call the cops to do a health and welfare check on the home and the occupants.
But, that's just me.