O J W HYDROGRAPHY LTD Company number 12058602 · Monitor this company Active Overview People 1 Financial Control Documents Analysis Location Related Registered office AddressPolkerris Gover Hill, Mount Hawke, Truro, United Kingdom, TR4 8BH PostcodeTR4 8BH Companies at this postcode 5 Average house price in TR4 8BH £277,000 (3 sales) Map