The best way to assess the actual value of your home is to compare it against the properties in your neighbourhood. Comparing prices is also a good idea if you find a perfect home on the market, but you think its price is blown out of proportion.
You can get a price comparison report to get a complete insight into the prices in a specific neighbourhood or street. You can get access to a free Price Comparison report on the Property Price Advice sold house price page. It will enable you to apply your specific criteria and review current and historical price data.