R E JOHNSON DESIGN CONSULTANTS LTD Company number 16755811 · Monitor this company Active Overview People 1 Control Documents Analysis Location Related Registered office AddressDIAMOND AND CO, Northway House 257-258 Upper Street, Islington, London, N1 1RU PostcodeN1 1RU Companies at this postcode 182 Average house price in N1 1RU £646,000 (25 sales) Map