I just started up the Kalendis calendar calculator to see what it would say for today, and saw that it still had our old location stored (unsurprisingly).
So I changed it to our new location (within 0.04" N of what I had written down, since it would only do 0.1" increments), and saw that it displayed information about the change—in this case, how far we moved :)
So, since I had always wondered exactly how far it was (I had told people "a couple of hundred metres", but that was more a guess than anything) but was too lazy to look, here it is—helpfully copied to the clipboard by Kalendis.
Switching from "Old Winsener Str. 131"
to "Radbrucher Stieg 46"
Bearing = 209,7° (15,3°S of SW)
same time zone
Spherical Geometric Distance = 0,26 km = 0,86727 Lt·µs
Oblate Spheroid Distance = 0,26 km = 0,86727 Lt·µs
(Lt·µs = distance that light travels in a microsecond)
Difference in Longitude = 0,00194°W, Latitude = 0,00203°S
At "Radbrucher Stieg 46" there are
111,3 km/degree = 30,9 m/s of latitude and
66,46 km/degree = 18,5 m/s of longitude
Mean Solar Time = UT + 39m 56s
So, according to this calculation, we moved roughly 260 m (about a quarter of a kilometre; about 850 ft) SW.