[![location][1]][1]

[This article](http://www.hp-lexicon.org/atlas/britain/atlas-b-surrey.html) in the HP Lexicon gives a very good argument for Little Whinging (the location of the Dursleys' house) being roughly where it's shown on this map, in the far north of Surrey close to Staines.
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The [filming location](http://www.historic-uk.com/HistoryMagazine/DestinationsUK/harry-potter-film-locations/), meanwhile, is in the village of Martins Heron near Bracknell in Berkshire.

  [1]: https://i.sstatic.net/KcNST.jpg