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[_] Post code data and properties

Martin Joiner martin at
Mon Feb 11 18:10:11 GMT 2013

Google Maps API will do the first bit (Validate post code and return 
address) with a usable degree of accuracy. It's free to use up to 10,000 
page requests per some period of time. But to discover if it's owned or 
ranted I imagine you'll have to give a couple of hundred quid a month to 
Zoopla/rightmove/primelocation/your-move and/or the people who provide 
the data to them to get access to their database.