I've finally added some lot numbers to the map in my area. Took a little walk around some random streets and was able to figure out the number pattern. That allowed me to fill in ever address in the village.
Hopefully when the Nominatim gets updated we'll be able to search for lot numbers in Charlestown.
Actually if you look at the Bing overhead shots of the area you'll notice many houses in there not accounted for. It's actually more of a conceptualized lot scheme than the actual one. You'll notice at Enid's Barber Supplies there's a W and E component to the lot number. The area between Adelaide and St. Stephen's is one lot width, the others are two and each lot may have up to 4 main divisions.
But THAT is something for another time. :-)
P.S. Zoom in on the map to see Charlestown