Property Tax Appeal Companies - Houston TX

[Masha Rizzi]

I don't know about any one else - but my property taxes have increased significantly this year (50% on one of the property alone). This was totally unexpected and way out of the norm (I've had my properties for years now and these jumps were drastic!). 

Does anyone in the Houston area have any property tax appeal companies they could recommend? I know I can do it myself, but I'd like to see what the cost is versus my time value. 

Thanks!