Use the Land Register Online to find out property prices in your area.
If you want to find out a previous sale price of a property you are interested in, then the Land Register Online will tell you. This site gives access to the Land Registry, which holds details of 19 million registered properties in England and the Wales. Copies of title plans and registers can be downloaded in PDF format at a cost of £2 each.
The Register gives ownership details and where available, property price information. Before you buy, have a quick look at an example of a register and title plan to see that it has the sort of information you are after.
When the Register cannot find property details, it will advise you of other routes of investigation.