The REAL 835 Chartres Street
Here's a link to Google's double view of 835 Chartres Street, New Orleans -- in other words, Mike Longstreet's house (if you click the link below and a regular map comes up, just click its Satellite view button):
https://www.google.com/maps/place/835+Chartres+St,+New+Orleans,+LA+70116/@29.9589659,-90.0627151,34m/data=!3m1!1e3!4m5!3m4!1s0x8620a61105c32ec1:0x968f88401a681f4a!8m2!3d29.9589711!4d-90.0626789
The street view speaks for itself! In the overhead view, #835 is the leftmost third of the three adjoined white-roofed houses just west of the intersection. The courtyard is clearly visible, and behind that is the kitchen (which is a separate building).
It's unusual for TV shows to give a house's actual location, let alone the exact address. Sometimes the real house and its fictional location are thousands of miles apart (e.g., Jessica Fletcher's house in "Cabot Cove, Maine" -- which is actually in Mendocino, California!). But Longstreet is clearly an exception -- the street sign at the corner of Chartres and Dumaine is frequently shown in establishing shots, and if that's not Mike's house just a few paces away, then it's the identical twin!
So, even though the show was reportedly filmed "mostly" in California, that presumably means that the house's interior was a studio set, and some other locations were also in LA. Some of the exterior shots, however (including virtually all of those on Chartres Street), were apparently filmed in New Orleans.
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