Summary:

At the stage of market analysis prior to application of appropriate proce-dures for determining a value of the property an important element is to determi-nate a variability of immobility prices over a time, and if the impact of the transac-tion at the time of transfer is important for volatility, it should be adjust transaction prices based on accumulated property.
It is important to confirm for the stage of the valuation of the recent years events at the Polish real estate market. While still 5-10 years ago, in a predictable and regular way property prices shaped in accordance with a trend of small grow-ing, then starting from 2003 the property market in Poland has entered the period known as boom and the market prices observed a very large price increases. Dif-ferences between current market prices for similar properties can vary by a few or several percent from month to month, and the disregard of these changes over time during the measurement could lead to a significant underestimation of the real estate value.
Article aims determine the suitability of statistical models to detect and de-termine the price changes in the accumulated database real estate and their appli-cation to adjust prices due to the shift of the transaction in time.