I am using the tax assessor in some of my other changes to confirm that the street name is correct and that the addresses near a given street are wrong. The tax assessor is financially motivated in accurate addresses to send tax bills, and it's a public record. It's not perfect, but it's an additional data point.

It also helps with putting an address within a bounding box. It's also a good source of alternate street names that may not be consistently used on the street signs.

I use it as an additional data point to confirm that all of the data is consistent.  In this specific case, it's not as important as the street sign. There have been some interesting typos and confirmation of oddities found by using multiple data sources.