S20 3 postcode sector in the S20 district

S20 3 is a sector of the S20 district: every postcode that starts S20 3. It has 29 postcodes in use, 6 of them large-user postcodes. A large-user postcode is one Royal Mail gives to a single address that gets a lot of mail.

Not sure what a sector is? UK postcode format explained.

Every postcode in the S20 3 sector, and which are new since 2020

Map of every postcode in the S20 3 sector, by new since 2020 Of the 29 postcodes in the S20 3 sector that ONS places, 29 were in use before 2020. Places named: Mosborough. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. S20 3AA: before 2020S20 3AB: before 2020S20 3AD: before 2020S20 3FE: before 2020S20 3FF: before 2020S20 3FG: before 2020S20 3FH: before 2020S20 3FJ: before 2020S20 3FR: before 2020S20 3FS: before 2020S20 3FU: before 2020S20 3GA: before 2020S20 3GB: before 2020S20 3GE: before 2020S20 3GH: before 2020S20 3GL: before 2020S20 3GN: before 2020S20 3GP: before 2020S20 3GQ: before 2020S20 3GR: before 2020S20 3GS: before 2020S20 3GT: before 2020S20 3GU: before 2020S20 3GW: before 2020S20 3GX: before 2020S20 3GY: before 2020S20 3GZ: before 2020S20 3PJ: before 2020S20 3RW: before 2020 Mosborough Map of every postcode in the S20 3 sector, by new since 2020 Of the 29 postcodes in the S20 3 sector that ONS places, 29 were in use before 2020. Places named: Mosborough. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. Mosborough
  • New since 2020: 0
  • In use before 2020: 29

Of the 29 postcodes in the S20 3 sector that ONS places, 29 were in use before 2020.

Each mark is a postcode's centre point as ONS gives it, not a building. Press one to see its postcode and open its page. New since 2020 means it came into use in January 2020 or later. No boundary is drawn. Names in italics are council wards: we hold no town or village names here.

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; when each came into use: the same directory; roads, rivers and built-up areas: Contains OS data © Crown copyright and database right 2026. Drawn by us. Street map: Ordnance Survey, OS Open Zoomstack, Open Government Licence v3.0, drawn with MapLibre. How we use them

What do homes sell for in S20 3?

HM Land Registry records 3 sales of homes in S20 3 in the 12 months to August 2026: too few to give a typical price.

  • Detached 2 sales, too few to price
  • Semi-detached 1 sale, too few to price

Standard sales of homes at market value at the postcodes that start S20 3. A typical price is the median, the middle sale, given from 5 sales or more.

How we work this out: house prices by postcode

Source: HM Land Registry Price Paid Data, files dated 28 September 2026. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0. How we use it

Postcodes in S20 3

Pick a postcode to see its council and MP, broadband, flood risk, what homes sell for, council tax, the nearest schools and stations, and crime around it.

S20 3AAS20 3ABS20 3ADS20 3FES20 3FFS20 3FGS20 3FHS20 3FJS20 3FRS20 3FSS20 3FUS20 3GAS20 3GBS20 3GES20 3GHS20 3GLS20 3GNS20 3GPS20 3GQS20 3GRS20 3GSS20 3GTS20 3GUS20 3GWS20 3GXS20 3GYS20 3GZS20 3PJS20 3RW

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. Postcodes that have ended are not listed. See all our data sources

What council am I in? The council, borough or local authority for a postcode, and the county council where there is one. What ward am I in? The ward for a postcode, with its council, constituency and parish.

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