I've just written a brand new calculator to estimate apartment prices. It's based on land value, building costs, view, and car parking spaces. You'll need to know land values (which local councils often supply), but you'll have to guess at the value of views and car parking. Building costs vary greatly. And there are many intangibles, and fashions change. You always need a professional valuation, but this little calculator lets you play with some important factors and might give you a better understanding of underlying property prices. It's just a bit of fun, but it lets you play with some back-of-the-envelope calculations that might clarify the underlying values of flats and apartments.