Zillow only uses one of these tools and in my experience their values are off 30 to 40%
NOTE: MLS is only website used by Realtors and appraisers.
Lynn911 Dallas Realtor & Consultant, Credit Repair Advisor
The Michael Group - Dallas Business Journal Top Ranked Realtors
REALTOR | Mortgage Broker | Consultant
Keller Williams Realty | 360 Lending Group
The best idea is speak with a realtor who can take a look at the condition of your home and advised you on actual sales and listings in the area.
Mindy Lowry, RE/MAX Heritage
If you do not have a Realtor I will be glad to do this for you.
The absolutely best place to find comparable homes is through a Realtor. Many will happily provide you with a complimentary market analysis for your home. Take advantage of the offer, it is the most reliable opinion you will get.