How can I find out the average inflation/deflation rate for flats/houses over the last 10 years?

Peak prices are said to have been 2008. However, many properties on the market are much higher than their 2005 selling price and of course way, way higher than their 2002 price (when the rises began). A few are at 2008 prices (not sold but the owners are asking for the 2008 selling price plus).

What I would like to know, please, is:

1. What is the % increase or decrease in apartment and also house prices in Wrocław since 2005 (Q2) ?

2. What is the % increase or decrease in apartment and also house prices in Wroclaw since 2008 (Q3) ?

3. What is the % increase or decrease in apartment and also house prices in Krakow since 2005 (Q2) ?

4. What is the % increase or decrease in apartment and also house prices in Krakow since 2008 (Q3) ?

(Sold prices, not just asking prices)

If anyone can give me some assistance in finding this out, it would be great.

So you simply want to know how prices were changing in these 2 cities in last 10 years?
Here is for whole Poland:



Here are prices for few cities: ceny_transakcyjne_mieszkan__dane_NBP.jpg

Good stuff, thank you Monitor. It's fascinating to me, it really is. No one I know can really work out what's going on with the prices.