HARMON PROFICIENT LTD Company number 11936026 · Monitor this company Active - Proposal to Strike off Overview People 1 Financial Control Documents Analysis Location Related Registered office Address98 Ollerton Close, Grappenhall, Warrington, Cheshire, United Kingdom, WA4 2UD PostcodeWA4 2UD Companies at this postcode 7 Average house price in WA4 2UD £155,000 (18 sales) Map