QL DEVELOPMENT LTD Company number 13514898 · Monitor this company Active Overview People 2 Financial Control Documents Gazette Analysis Location Related Registered office AddressAlton House 27-29 Grange Road, Darlington, England, DL1 5NA PostcodeDL1 5NA Companies at this postcode 26 Average house price in DL1 5NA £301,000 (5 sales) Map