Apraisal adjustements by region

[Olga Levin]

Does anyone have any resources that can be used to access values for adjustments to be made when making appraisals in different areas.

I know that a pool or an extra bedroom in San Diego, California will merit a different deduction then Orlando, FL, but how much exactly?

Is there a public database for this kind of information that I can look up online or any other source?

Thanks in advance!