Webthe actual value of any house will depend on the local real estate market, house condition and age, home improvements made and needed, and many other factors. Webzillow home value index (zhvi): A measure of the typical home value and market changes across a given region and housing type. It reflects the typical value for homes in the. Webthe fhfa hpi incorporates tens of millions of home sales and offers insights about house price fluctuations at the national, census division, state, metro area, county, zip code,.