Hometrack is a means of finding home prices in the UK. In the section titled "Find out property prices in your area for FREE!," enter street, town or postcode, then hit "Go."
Hometrack provides their estimation of the property's value, and the property is linked with Google Maps. We find that entering just the postcode is the most straightforward way of finding the property you're looking for. Even if the exact address does not come up, this is still a good way to get a rough idea of comparable properties in the area.