How do I find the value of a house from a specific date?

[Bsch4477]

Zillow often has the value of homes sold in the past or ask a realtor for advice. 

[rjs]

Why do you need the value as of a past date? If it's because you inherited the house, you should get a retroactive appraisal from a licensed professional appraiser. Anything else is just a guess, and won't carry much weight with the IRS.