SW1Y postcode district: City of Westminster and around
SW1Y is a postcode district in England, with 183 postcodes in use in 3 sectors. It has postcodes in City of Westminster and Wandsworth. It is split between 2 councils: Westminster (182 postcodes) and Wandsworth (1).
- Postcodes in use
- 183
- Sectors
- 3
- Councils
- 2 councils
- Places
- 2 places
Source: ONS Postcode Directory, August 2026, loaded 20 October 2026.
Every postcode in SW1Y, by gigabit broadband
- No home or business can get gigabit: 0
- Some can get gigabit: 24
- Every home and business can get gigabit: 144
- Ofcom gives no figure: 15
Of the 183 postcodes in SW1Y that ONS places, 24 have some that can, 144 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. 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 51.5076, longitude -0.1345. 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.
Further out, not drawn
This postcode lies well apart from the rest, so the map is drawn without it to show the rest closer; it is in every count.
What broadband can you get in SW1Y?
Ofcom reports on 168 of the 183 postcodes in SW1Y. At 144 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 SW1Y at risk of flooding?
None of the 183 postcodes in SW1Y is on the Environment Agency's list of postcodes with a home or business in an area at risk of flooding from rivers or the sea.
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 SW1Y?
Homes in SW1Y sold for a typical £837,500 in the 12 months to September 2026, across 10 sales, HM Land Registry's figures show.
- Flat or maisonette £837,500 10 sales
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 SW1Y
Pick a sector, then a postcode. A sector is the district plus the next digit.
UK postcode format explainedPlaces in SW1Y
Towns and villages with postcodes in SW1Y, and how many each has here.
Who covers SW1Y
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 Westminster182
- Battersea1
Police force areas
- Metropolitan Police183
Next to SW1Y
"Next to" is by number: the districts before and after SW1Y 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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