JJ DIAGNOSTICS LTD Company number 15971783 · Monitor this company Active Overview People 2 Financial Control Documents Analysis Location Related Registered office Address23 High Street, Stotfold, Hitchin, Hertfordshire, England, SG5 4LL PostcodeSG5 4LL Companies at this postcode 13 Average house price in SG5 4LL £489,000 (36 sales) Map