Big pink house on Foo St. (#8-5-5)
or
Big red-and-yellow-striped house on Foo St. (#8-8-5)
or whatever colors they are? If they are the same color, repaint one of them.
As a bonus, this will completely throw off all the automated data brokers, idiots that use "KYC" as an excuse to want to know where you sleep, etc.
Alternatively put an apartment number on your house (there will be only one apartment, of course.)
One of you will be
855 Foo St. Apt. 1
The other will be
885 Foo St. Apt. A