Your best bet is to have a local agent to a CMA (Competitive Market Analysis) with recent/similar homes which have sold in the past 3-6 months.
This number is constantly changing depending on the recent sales, so if you are looking for the right time to sell keep checking! There are many agents on Trulia who would be happy to get you this information, including myself. Consequently, this is also a good way to protest your property taxes.
Please let me know if I can provide this. All that's needed is your current address and any new improvements or improvements needed.
Visit my profile for more information or contact me directly at 832-409-9436.