Is this a real estate service for international properties? If so, are there particular cities that you service? The reason I ask is that it may be better to include several international landmarks as opposed to people thinking your service is aimed to only to a particular city. I see that you mention Fresno a couple of times, so I assume you are located in or around Fresno. I went with Yosemite as the US landmark since it is the most recognizable icon that represents the whole of California. If you have any other suggestions I can easily do any other landmark you need. If I get in the Top 5 phase, I will submit a few more ideas.
Assuming that these might eventually be on for sale signs, I did a few with designs with a bold font for better visibility. Also, I did a somewhat stylized versions of the bridge so the it becomes more brandable as a logo. Factoring in that the logo may be used in both small and large formats (such as business cards and signage), it's is imperative the the logo maintain good recognition at any size.
As alway, your feedback would be greatly appreciated.
I submitted a few more versions. I did the Old Water Tower in a few different styles. Please take a look at my portfolio for other examples of styles of illustrations, which you feel may be better suited for your needs.