Classification scheme
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The AddressBase Classification Scheme provides varying levels of classification for addressable objects which are captured and maintained by the Local Authorities and Ordnance Survey. This allows searches to be limited on residential or commercial addresses or be more specific to find all the flats or all fast-food outlets. The varying levels of classification are as follows:
Primary Level Classification R: Residential C: Commercial
Secondary Level Classification RD: Residential Dwelling CH: Hotel/Motel/ Boarding/ Guest House
Tertiary Level Classification RD02: Detached House CH01: Boarding/Guest House/ Bed And Breakfast/Youth Hostel
Quaternary Level CH01YH: Youth Hostel
The level of classification varies across all addressable objects and across the different products.
There are only certain classification codes that extend to the quaternary classification level as shown above. A full list of the classification codes can be found on our Product Support page on the OS website.
The full classification scheme is available in CSV and .xlsx formats for download in the following zip file.