SW1X postcode district: City of Westminster and around
SW1X is a postcode district in England, with 402 postcodes in use in 4 sectors. It has postcodes in City of Westminster, Kensington and Chelsea and Wandsworth. It is split between 3 councils: Westminster (209 postcodes), Kensington and Chelsea (191) and Wandsworth (2).
- Postcodes in use
- 402
- Sectors
- 4
- Councils
- 3 councils
- Places
- 3 places
Source: ONS Postcode Directory, August 2026, loaded 20 October 2026.
Every postcode in SW1X, by gigabit broadband
- No home or business can get gigabit: 11
- Some can get gigabit: 70
- Every home and business can get gigabit: 306
- Ofcom gives no figure: 15
- Outline: where 5 or more postcodes without gigabit lie together
Of the 402 postcodes in SW1X that ONS places, 11 have no home or business that can get gigabit, 70 have some that can, 306 can all get it and 15 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 51.4982, longitude -0.1568. 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
Where the postcodes without gigabit lie together
- 8 postcodes without gigabit, outlined on the map. SW1X 9HG, is the one nearest the middle of them.
What broadband can you get in SW1X?
Ofcom reports on 387 of the 402 postcodes in SW1X. At 306 of them every home and business can get gigabit broadband.
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 checkerSource: Ofcom Connected Nations, Connected Nations, Spring 2026, data for January 2026.
Is SW1X at risk of flooding?
1 of the 402 postcodes in SW1X has a home or business in an area at risk of flooding from rivers or the sea, the Environment Agency says. At those, it puts none of the homes and businesses in an area at high or medium risk.
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 SW1X?
Homes in SW1X sold for a typical £3,320,000 in the 12 months to September 2026, across 48 sales, up 33.1% on the 12 months before, HM Land Registry's figures show.
- Terraced £3,385,000 17 sales
- Flat or maisonette £2,400,000 31 sales
Each bar is that kind's typical price, against the most expensive kind here.
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 SW1X
Pick a sector, then a postcode. A sector is the district plus the next digit.
UK postcode format explainedPlaces in SW1X
Towns and villages with postcodes in SW1X, and how many each has here.
Who covers SW1X
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 Westminster209
- Kensington and Bayswater161
- Chelsea and Fulham30
- Battersea2
Police force areas
- Metropolitan Police402
Next to SW1X
"Next to" is by number: the districts before and after SW1X in the SW area.
Check a postcode
Where the facts on this page come from
- Office for National Statistics: ONS Postcode Directory
- Ofcom Connected Nations
- Environment Agency flood risk
- HM Land Registry Price Paid Data
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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