Modern house numbers are fortunately not so hard to find these days. However, they vary widely in price and in size. I wanted a nice sans serif typeface in a large (i.e., 8″ tall) size. If you want a “name” font you pay a lot of money for those numbers (e.g., Neutra numbers from DWR are $48 each, but only 4″ tall) . However, you can get some nice affordable numbers from, where else, modernhousenumbers.com. Their supplier water jet cuts these from 3/8″ aluminum plate in several alternative typefaces. The styles are nice, even if there isn’t infinite selection, and even if they aren’t the famous proprietary typefaces.
Here are my numbers (8″ high, 3/8″ thick brushed aluminum, in “Palm Springs”). These cost $29 per number. Excellent value.
These numbers are easy to install, although very hard to get in plane and level on barnwood. (You drill a 3/16″ hole in the wall and insert a 3/16 pin with some caulk on it. The pins fit into the back of the numbers.) I didn’t get it quite right, but I suspect I’m the only one who will notice.