A question we often get asked! Mapping over the past few years mainly due to the growth of free mapping services like google maps and bing maps have given the impression that mapping is a free resource. In fact, accurate mapping of any scale is incredibly expensive to create. There is the surveying, the interpretation of what each object on the land is but it's also a never ending process as new buildings are built, knocked down, etc.
Planning maps are in main based on OS Mastermap, which is the most detailed available, possibly the most detailed map of any country globally. A whole army of people at the OS are involved in maintaining the map, which costs money..alot of money! So unfortunately somehow this expenditure needs to be recouped!
However rest assured, getting a detailed map of your house and street from £10.80 is a great deal!