According to the U.S. Bureau of Labor Statistics, prices for housing were 46.89% lower in 2000 than in 2017.
Housing experienced an average inflation rate of 2.29% per year between 2000 and 2017. In other words, housing costing $100,000 in the year 2000 would cost $146,885.60 in 2017 for an equivalent purchase.
Average pricing changed by 3.35% in 2000, above the yearly average change for housing during the 2000-2017 time period. Compared to overall inflation for all items in 2000 (3.27%), price inflation for housing was higher.
Raw Consumer Price Index data from U.S. Bureau of Labor Statistics for Housing:
How to calculate inflation for housing between 2000 and 2017
Start with the CPI inflation formula:
CPI in 2017 / CPI in 2000 * 2000 USD value = 2017 USD value
Then plug in historical CPI values from above. The CPI for Housing was 169.575 in the year 2000 and 249.081 in 2017:
249.081 / 169.575 * $100,000 = $146,885.60
Therefore, according to U.S. Bureau of Labor Statistics, the "purchasing power" of $100,000 from 2000 is $146,885.60 in 2017 (in the category of Housing).