I had to go and do it, so if anyone else wants to do it, here goes…
Go on Google (or Bing) and type your Post Code or Zip Code followed by ‘map coordinates’.
Note the coordinates, which will be in this format 7.123456, - 6.654321
Go to the Flight Sim map and type the coordinates into the search box on the left, then click the box below and you will get a custom point on the map!
Click on this point and ‘Set as Departure’.
When you click ‘Begin Flight’, click the Pause key immediately then set the camera aiming down, right onto your house!
I installed MSFS 2020 back in September and found my house with no trouble. It really didn’t look like my house, but was a reasonable facsimile. At least the roof line was correct. Now fast forward almost 3 months to the FS 20 update done today, 11-24-20. It is supposed to be an update of the entire USA. The first thing I did after the update had installed was go look at my house to see if they had made it closer to what it really is. Unfortunately, according to the update, I now apparently live in a metal warehouse building! No windows, flat roof, and with a rollup garage door where my front door used to be. Aren’t the buildings supposed to look like aerial photos? I’m very disappointed.