SW1A postcode district: City of Westminster and around

SW1A is a postcode district in England, with 145 postcodes in use in 3 sectors. It has postcodes in City of Westminster and Wandsworth. It is split between 2 councils: Westminster (143 postcodes) and Wandsworth (2).

Postcodes in use
145
Sectors
3
Councils
2 councils
Places
2 places

Source: ONS Postcode Directory, August 2026, loaded 20 October 2026.

Every postcode in SW1A, by gigabit broadband

Map of every postcode in SW1A, by gigabit broadband Of the 145 postcodes in SW1A that ONS places, 30 have no home or business that can get gigabit, 19 have some that can, 76 can all get it and 20 have no Ofcom figure. 3 groups of postcodes without gigabit are outlined: 11 postcodes without gigabit; 8 postcodes without gigabit; 7 postcodes without gigabit. Places named: St James's. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A3212A202A301A3216 SW1A 1BH: no Ofcom figureSW1A 1EG: no Ofcom figureSW1A 1LZ: no Ofcom figureSW1A 1RB: no Ofcom figureSW1A 1YT: no Ofcom figureSW1A 2EJ: no Ofcom figureSW1A 2NL: no Ofcom figureSW1A 2WH: no Ofcom figureSW1A 1BB: gigabit for allSW1A 1BW: gigabit for allSW1A 1DD: gigabit for allSW1A 1EA: gigabit for allSW1A 1EE: gigabit for allSW1A 1EF: gigabit for allSW1A 1ER: gigabit for allSW1A 1ES: gigabit for allSW1A 1HA: gigabit for allSW1A 1HJ: gigabit for allSW1A 1JB: gigabit for allSW1A 1JD: gigabit for allSW1A 1JT: gigabit for allSW1A 1LA: gigabit for allSW1A 1LD: gigabit for allSW1A 1LE: gigabit for allSW1A 1LN: gigabit for allSW1A 1LP: gigabit for allSW1A 1LR: gigabit for allSW1A 1LS: gigabit for allSW1A 1LY: gigabit for allSW1A 1NE: gigabit for allSW1A 1NF: gigabit for allSW1A 1NJ: gigabit for allSW1A 1NN: gigabit for allSW1A 1NX: gigabit for allSW1A 1PH: gigabit for allSW1A 1PJ: gigabit for allSW1A 1PL: gigabit for allSW1A 1RA: gigabit for allSW1A 1RD: gigabit for allSW1A 1RE: gigabit for allSW1A 1RN: gigabit for allSW1A 2AE: gigabit for allSW1A 2AH: gigabit for allSW1A 2AQ: gigabit for allSW1A 2AW: gigabit for allSW1A 2AY: gigabit for allSW1A 2BD: gigabit for allSW1A 2BE: gigabit for allSW1A 2BH: gigabit for allSW1A 2BJ: gigabit for allSW1A 2BL: gigabit for allSW1A 2BQ: gigabit for allSW1A 2BT: gigabit for allSW1A 2DD: gigabit for allSW1A 2DG: gigabit for allSW1A 2DR: gigabit for allSW1A 2DX: gigabit for allSW1A 2EF: gigabit for allSW1A 2EG: gigabit for allSW1A 2EH: gigabit for allSW1A 2EP: gigabit for allSW1A 2HB: gigabit for allSW1A 2HD: gigabit for allSW1A 2HJ: gigabit for allSW1A 2HN: gigabit for allSW1A 2HQ: gigabit for allSW1A 2HR: gigabit for allSW1A 2HU: gigabit for allSW1A 2JN: gigabit for allSW1A 2JX: gigabit for allSW1A 2NP: gigabit for allSW1A 2SH: gigabit for allSW1A 2TS: gigabit for allSW1A 2DB: gigabit for allSW1A 1BA: some gigabitSW1A 1BG: some gigabitSW1A 1DH: some gigabitSW1A 1DP: some gigabitSW1A 1HD: some gigabitSW1A 1NH: some gigabitSW1A 1NP: some gigabitSW1A 1NR: some gigabitSW1A 1NS: some gigabitSW1A 2BB: some gigabitSW1A 2BX: some gigabitSW1A 2HP: some gigabitSW1A 2JH: some gigabitSW1A 2JR: some gigabitSW1A 2NE: some gigabitSW1A 2NH: some gigabitSW1A 2DY: some gigabitSW1A 0AA: no gigabitSW1A 1AA: no gigabitSW1A 1AB: no gigabitSW1A 1AG: no gigabitSW1A 1BD: no gigabitSW1A 1BJ: no gigabitSW1A 1BL: no gigabitSW1A 1BQ: no gigabitSW1A 1DA: no gigabitSW1A 1DR: no gigabitSW1A 1JR: no gigabitSW1A 2AA: no gigabitSW1A 2AB: no gigabitSW1A 2AD: no gigabitSW1A 2AG: no gigabitSW1A 2AU: no gigabitSW1A 2AX: no gigabitSW1A 2BS: no gigabitSW1A 2ER: no gigabitSW1A 2EX: no gigabitSW1A 2HZ: no gigabitSW1A 2JF: no gigabitSW1A 2JJ: no gigabitSW1A 2JL: no gigabitSW1A 2LW: no gigabit St James's 11 postcodes without gigabit, outlined: this goes to SW1A 2AU, the one nearest the middle of them11 postcodes without gigabit8 postcodes without gigabit, outlined: this goes to SW1A 1BQ, the one nearest the middle of them8 postcodes without gigabit7 postcodes without gigabit, outlined: this goes to SW1A 2HZ, the one nearest the middle of them7 postcodes without gigabit Map of every postcode in SW1A, by gigabit broadband Of the 145 postcodes in SW1A that ONS places, 30 have no home or business that can get gigabit, 19 have some that can, 76 can all get it and 20 have no Ofcom figure. 3 groups of postcodes without gigabit are outlined: 11 postcodes without gigabit; 8 postcodes without gigabit; 7 postcodes without gigabit. 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
  • No home or business can get gigabit: 30
  • Some can get gigabit: 19
  • Every home and business can get gigabit: 76
  • Ofcom gives no figure: 20
  • Outline: where 5 or more postcodes without gigabit lie together

Of the 145 postcodes in SW1A that ONS places, 30 have no home or business that can get gigabit, 19 have some that can, 76 can all get it and 20 have no Ofcom figure.

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. A dashed outline shows where 5 or more lie within 150 metres of each other. It is not a boundary, and 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.

The middle of its postcodes: latitude 51.5046, longitude -0.1322. Open this area on OpenStreetMap

Sources: ONS Postcode Directory, August 2026, loaded 20 October 2026; Ofcom Connected Nations, Connected Nations, Spring 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.

Postcodes without gigabit

30 postcodes here have no gigabit. These are the 12 first in postcode order.

SW1A 0AASW1A 1AASW1A 1ABSW1A 1AGSW1A 1BDSW1A 1BJSW1A 1BLSW1A 1BQSW1A 1DASW1A 1DRSW1A 1JRSW1A 2AA

Where the postcodes without gigabit lie together

  • 11 postcodes without gigabit, outlined on the map. SW1A 2AU, is the one nearest the middle of them.
  • 8 postcodes without gigabit, outlined on the map. SW1A 1BQ, is the one nearest the middle of them.
  • 7 postcodes without gigabit, outlined on the map. SW1A 2HZ, is the one nearest the middle of them.

What broadband can you get in SW1A?

Ofcom reports on 125 of the 145 postcodes in SW1A. At 76 of them every home and business can get gigabit broadband.

Postcodes where every home can get gigabit76 of 125
Postcodes where every home can get superfast76 of 125

Ofcom gives each postcode's share of homes and businesses, not how many there are, so these count postcodes. Each postcode page has its own figures. A provider's checker answers for one address.

Check one address on Ofcom's checker

Source: Ofcom Connected Nations, Connected Nations, Spring 2026, data for January 2026.

Is SW1A at risk of flooding?

48 of the 145 postcodes in SW1A have a home or business in an area at risk of flooding from rivers or the sea, the Environment Agency says. At those, it puts 6 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 48 of 145 postcodes High: 6Very low: 207

High: 3.3% or more a year (1 in 30). Medium: 1% to 3.3% a year. Low: 0.1% to 1% a year. Very low: under 0.1% a year (1 in 1,000). Each band is the chance of flooding in any one year.

Homes and businesses in an area at risk of flooding from rivers or the sea, as the Environment Agency counts them, added up over the postcodes. It is for the land, not each building, and leaves out surface water, groundwater and sewers. Each postcode page has its own figures and its flood warning areas.

Source: Environment Agency flood risk, published 6 July 2026.

What do homes sell for in SW1A?

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

Standard sales of homes at market value. A typical price is the median, the middle sale. Sales take weeks to be registered, so the last month or two are incomplete. Each postcode page gives the figure for its own postcode sector.

Source: HM Land Registry Price Paid Data, files dated 28 October 2026.

Postcodes in SW1A

Pick a sector, then a postcode. A sector is the district plus the next digit.

SW1A 03 postcodesSW1A 167 postcodesSW1A 275 postcodes
UK postcode format explained

Places in SW1A

Towns and villages with postcodes in SW1A, and how many each has here.

City of Westminster postcodes,142Wandsworth postcodes,2

Who covers SW1A

How many of the district's postcodes in use fall under each council, constituency and police force area.

Councils

What council am I in?

Constituencies

  • Cities of London and Westminster143
  • Battersea2

Police force areas

  • Metropolitan Police145

Next to SW1A

SW1E postcode district All SW districts City of Westminster postcodes

"Next to" is by number: the district after SW1A in the SW area.

Check a postcode

Where the facts on this page come from

Contains public sector information licensed under the Open Government Licence v3.0. 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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