GEM PLUMBING AND HEATING LTD Company number 13956002 · Monitor this company Active Overview People 1 Financial Control Documents Analysis Location Related Registered office Address20 Loretto Gardens, Harrow, Middlesex, United Kingdom, HA3 9LZ PostcodeHA3 9LZ Companies at this postcode 19 Average house price in HA3 9LZ £616,000 (17 sales) Map