Let’s look at it this way. If Realtors can have flyers and newspaper ads showing sold and listings, and if realtors can show comps to their clients (or anyone who asks), then I don’t see anything wrong with posting on your blog.
The only thing is that property owners may not want their houses featured. But that’s not for them to decide — the information is public.
I would use the youtube.com policy. If anyone contacts you asking that their information be removed, then you should promptly comply.