The factors that may lead to property appreciation

[Liam Martin Ruane]

So I am doing a thesis on what factors may affect property appreciation. In Houston specifically, less developed low income areas have recently experienced high house price appreciation, and I wanted to run a regression that analyzes the relationship between such factors. 

The factors could be as follows:

X1: Zipcode Median income

X2: Zipcode predominant race @ time 0 (dummy variable)

X3: In 100 year flood (Dummy variable)

Xn: Still considering factors

Y variable would be something like % price change over a certain time frame (maybe 15 years).

I'm hoping someone has some suggestions as to where we could get our data from, as I know the data exists, but just trying to find an efficient way to get it is proving challenging. 

Any suggestions would be much appreciated. :)