SW1A 1 postcode sector in the SW1A district

SW1A 1 is a sector of the SW1A district: every postcode that starts SW1A 1. It has 67 postcodes in use, 20 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 SW1A 1 sector, and which are new since 2020

Map of every postcode in the SW1A 1 sector, by new since 2020 Of the 67 postcodes in the SW1A 1 sector that ONS places, 2 are new since 2020 and 65 were in use before 2020. Places named: St James's. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A3212A4A302A3216 SW1A 1AA: before 2020SW1A 1AG: before 2020SW1A 1BA: before 2020SW1A 1BB: before 2020SW1A 1BD: before 2020SW1A 1BG: before 2020SW1A 1BH: before 2020SW1A 1BJ: before 2020SW1A 1BL: before 2020SW1A 1BQ: before 2020SW1A 1BW: before 2020SW1A 1DA: before 2020SW1A 1DD: before 2020SW1A 1DH: before 2020SW1A 1DP: before 2020SW1A 1DR: before 2020SW1A 1EA: before 2020SW1A 1EE: before 2020SW1A 1EF: before 2020SW1A 1ER: before 2020SW1A 1ES: before 2020SW1A 1HA: before 2020SW1A 1HD: before 2020SW1A 1JB: before 2020SW1A 1JD: before 2020SW1A 1JG: before 2020SW1A 1JR: before 2020SW1A 1JT: before 2020SW1A 1LA: before 2020SW1A 1LD: before 2020SW1A 1LE: before 2020SW1A 1LN: before 2020SW1A 1LP: before 2020SW1A 1LR: before 2020SW1A 1LS: before 2020SW1A 1LY: before 2020SW1A 1NE: before 2020SW1A 1NH: before 2020SW1A 1NJ: before 2020SW1A 1NN: before 2020SW1A 1NP: before 2020SW1A 1NR: before 2020SW1A 1NS: before 2020SW1A 1NX: before 2020SW1A 1NY: before 2020SW1A 1PH: before 2020SW1A 1PJ: before 2020SW1A 1PL: before 2020SW1A 1RA: before 2020SW1A 1RB: before 2020SW1A 1RD: before 2020SW1A 1RE: before 2020SW1A 1RN: before 2020SW1A 1YT: before 2020SW1A 1NF: new since 2020SW1A 1AH: new since 2020 St James's Map of every postcode in the SW1A 1 sector, by new since 2020 Of the 67 postcodes in the SW1A 1 sector that ONS places, 2 are new since 2020 and 65 were in use before 2020. Places named: St James's. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A3212 St James's
  • New since 2020: 2
  • In use before 2020: 65

Of the 67 postcodes in the SW1A 1 sector that ONS places, 2 are new since 2020 and 65 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. Where marks overlap, the one first in the key is drawn; the counts include every postcode. Names in italics are council wards: we hold no town or village names here.

Sources: ONS Postcode Directory, August 2026, loaded 20 October 2026; roads, rivers and built-up areas: Ordnance Survey open maps. 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.

The 2 newest postcodes

SW1A 1NFJune 2026SW1A 1AHDecember 2023

What do homes sell for in SW1A 1?

HM Land Registry records no standard sales of homes in SW1A 1 in the 12 months to September 2026.

Standard sales of homes at market value at the postcodes that start SW1A 1. 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 October 2026.

Postcodes in SW1A 1

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.

SW1A 1AASW1A 1ABSW1A 1AGSW1A 1AHSW1A 1BASW1A 1BBSW1A 1BDSW1A 1BGSW1A 1BHSW1A 1BJSW1A 1BLSW1A 1BNSW1A 1BQSW1A 1BSSW1A 1BWSW1A 1DASW1A 1DDSW1A 1DHSW1A 1DPSW1A 1DRSW1A 1EASW1A 1EESW1A 1EFSW1A 1EGSW1A 1ERSW1A 1ESSW1A 1HASW1A 1HDSW1A 1HJSW1A 1JBSW1A 1JDSW1A 1JGSW1A 1JRSW1A 1JTSW1A 1LASW1A 1LDSW1A 1LESW1A 1LNSW1A 1LPSW1A 1LRSW1A 1LSSW1A 1LYSW1A 1LZSW1A 1NESW1A 1NFSW1A 1NHSW1A 1NJSW1A 1NNSW1A 1NPSW1A 1NRSW1A 1NSSW1A 1NXSW1A 1NYSW1A 1PHSW1A 1PJSW1A 1PLSW1A 1RASW1A 1RBSW1A 1RDSW1A 1RESW1A 1RGSW1A 1RJSW1A 1RLSW1A 1RNSW1A 1RPSW1A 1YTSW1A 1ZA

Source: ONS Postcode Directory, August 2026, loaded 20 October 2026. Postcodes that have ended are not listed.

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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Where the facts on this page come from

Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0.

Licence: Open Government Licence v3.0.

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