Buckinghamshire site, famous for its role in World War II, is voted top in Wickes first Building with Pride awards.
Over the last two months the public have been voting for the building they would be most proud to put their name to.
Bletchley Park, made famous as the location where some of the most important intelligence work took place in the Second World War, has topped the poll.
From the 30 finalists, the top five buildings in the competition are:
1. Bletchley Park, Buckinghamshire
2. The Needles Old Battery, Isle of Wight
3. The Cavern Club, Liverpool
4. The Spinnaker, Portsmouth
5. Leith Hill Tower, Dorking
Wickes brand communications director, Matthew Critchley said: "The public have really taken this search to heart and have chosen a building that holds an incredibly important place in the British psyche.
"Bletchley Park has come to signify British ingenuity, courage and pride. I can't think of a more worthy winner of the first 'Building with Pride awards'."