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: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. See all our data sources

Every postcode in SW1Y, by flood risk

Map of every postcode in SW1Y, by flood risk Of the 183 postcodes in SW1Y that ONS places, 183 are not on the Environment Agency's at-risk list. One postcode lies beyond the edge and is listed under the map. Places named: St James's. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A4201A400 SW1Y 4AA: not on the flood risk listSW1Y 4AD: not on the flood risk listSW1Y 4AE: not on the flood risk listSW1Y 4AH: not on the flood risk listSW1Y 4AJ: not on the flood risk listSW1Y 4AN: not on the flood risk listSW1Y 4AR: not on the flood risk listSW1Y 4AU: not on the flood risk listSW1Y 4BE: not on the flood risk listSW1Y 4BN: not on the flood risk listSW1Y 4BP: not on the flood risk listSW1Y 4DG: not on the flood risk listSW1Y 4DL: not on the flood risk listSW1Y 4DN: not on the flood risk listSW1Y 4DP: not on the flood risk listSW1Y 4EA: not on the flood risk listSW1Y 4EE: not on the flood risk listSW1Y 4EL: not on the flood risk listSW1Y 4EN: not on the flood risk listSW1Y 4EX: not on the flood risk listSW1Y 4HA: not on the flood risk listSW1Y 4HE: not on the flood risk listSW1Y 4HG: not on the flood risk listSW1Y 4HH: not on the flood risk listSW1Y 4HT: not on the flood risk listSW1Y 4HX: not on the flood risk listSW1Y 4JE: not on the flood risk listSW1Y 4JH: not on the flood risk listSW1Y 4JR: not on the flood risk listSW1Y 4JS: not on the flood risk listSW1Y 4JY: not on the flood risk listSW1Y 4JZ: not on the flood risk listSW1Y 4LB: not on the flood risk listSW1Y 4LE: not on the flood risk listSW1Y 4LG: not on the flood risk listSW1Y 4LH: not on the flood risk listSW1Y 4LR: not on the flood risk listSW1Y 4NB: not on the flood risk listSW1Y 4NQ: not on the flood risk listSW1Y 4NW: not on the flood risk listSW1Y 4PD: not on the flood risk listSW1Y 4PE: not on the flood risk listSW1Y 4PH: not on the flood risk listSW1Y 4QE: not on the flood risk listSW1Y 4QL: not on the flood risk listSW1Y 4QN: not on the flood risk listSW1Y 4QQ: not on the flood risk listSW1Y 4QU: not on the flood risk listSW1Y 4QX: not on the flood risk listSW1Y 4RF: not on the flood risk listSW1Y 4RG: not on the flood risk listSW1Y 4RJ: not on the flood risk listSW1Y 4RL: not on the flood risk listSW1Y 4RP: not on the flood risk listSW1Y 4RW: not on the flood risk listSW1Y 4SP: not on the flood risk listSW1Y 4SQ: not on the flood risk listSW1Y 4TE: not on the flood risk listSW1Y 4UF: not on the flood risk listSW1Y 4UH: not on the flood risk listSW1Y 4UJ: not on the flood risk listSW1Y 4UR: not on the flood risk listSW1Y 4UY: not on the flood risk listSW1Y 4XA: not on the flood risk listSW1Y 5AA: not on the flood risk listSW1Y 5AD: not on the flood risk listSW1Y 5AF: not on the flood risk listSW1Y 5AG: not on the flood risk listSW1Y 5AH: not on the flood risk listSW1Y 5AN: not on the flood risk listSW1Y 5AQ: not on the flood risk listSW1Y 5AS: not on the flood risk listSW1Y 5AT: not on the flood risk listSW1Y 5AU: not on the flood risk listSW1Y 5AY: not on the flood risk listSW1Y 5BF: not on the flood risk listSW1Y 5BG: not on the flood risk listSW1Y 5BL: not on the flood risk listSW1Y 5BN: not on the flood risk listSW1Y 5BQ: not on the flood risk listSW1Y 5DG: not on the flood risk listSW1Y 5EA: not on the flood risk listSW1Y 5ED: not on the flood risk listSW1Y 5EP: not on the flood risk listSW1Y 5ER: not on the flood risk listSW1Y 5ES: not on the flood risk listSW1Y 5EW: not on the flood risk listSW1Y 5EY: not on the flood risk listSW1Y 5HD: not on the flood risk listSW1Y 5HS: not on the flood risk listSW1Y 5HU: not on the flood risk listSW1Y 5HZ: not on the flood risk listSW1Y 5JG: not on the flood risk listSW1Y 5JH: not on the flood risk listSW1Y 5JN: not on the flood risk listSW1Y 5JQ: not on the flood risk listSW1Y 5LP: not on the flood risk listSW1Y 5LU: not on the flood risk listSW1Y 5NP: not on the flood risk listSW1Y 5NQ: not on the flood risk listSW1Y 6AA: not on the flood risk listSW1Y 6AB: not on the flood risk listSW1Y 6AE: not on the flood risk listSW1Y 6AF: not on the flood risk listSW1Y 6AG: not on the flood risk listSW1Y 6AH: not on the flood risk listSW1Y 6AJ: not on the flood risk listSW1Y 6AL: not on the flood risk listSW1Y 6AU: not on the flood risk listSW1Y 6AW: not on the flood risk listSW1Y 6BB: not on the flood risk listSW1Y 6BL: not on the flood risk listSW1Y 6BS: not on the flood risk listSW1Y 6BU: not on the flood risk listSW1Y 6DB: not on the flood risk listSW1Y 6DD: not on the flood risk listSW1Y 6DE: not on the flood risk listSW1Y 6DF: not on the flood risk listSW1Y 6DJ: not on the flood risk listSW1Y 6DN: not on the flood risk listSW1Y 6DS: not on the flood risk listSW1Y 6DT: not on the flood risk listSW1Y 6EE: not on the flood risk listSW1Y 6HA: not on the flood risk listSW1Y 6HB: not on the flood risk listSW1Y 6HD: not on the flood risk listSW1Y 6HF: not on the flood risk listSW1Y 6HH: not on the flood risk listSW1Y 6HJ: not on the flood risk listSW1Y 6HR: not on the flood risk listSW1Y 6HU: not on the flood risk listSW1Y 6JB: not on the flood risk listSW1Y 6JE: not on the flood risk listSW1Y 6JF: not on the flood risk listSW1Y 6JH: not on the flood risk listSW1Y 6JP: not on the flood risk listSW1Y 6JT: not on the flood risk listSW1Y 6JX: not on the flood risk listSW1Y 6LB: not on the flood risk listSW1Y 6LT: not on the flood risk listSW1Y 6LX: not on the flood risk listSW1Y 6NH: not on the flood risk listSW1Y 6NP: not on the flood risk listSW1Y 6NY: not on the flood risk listSW1Y 6PF: not on the flood risk listSW1Y 6PP: not on the flood risk listSW1Y 6PX: not on the flood risk listSW1Y 6PY: not on the flood risk listSW1Y 6QA: not on the flood risk listSW1Y 6QB: not on the flood risk listSW1Y 6QF: not on the flood risk listSW1Y 6QG: not on the flood risk listSW1Y 6QL: not on the flood risk listSW1Y 6QT: not on the flood risk listSW1Y 6QU: not on the flood risk listSW1Y 6QW: not on the flood risk listSW1Y 6QY: not on the flood risk listSW1Y 6RE: not on the flood risk listSW1Y 6WW: not on the flood risk list St James's Map of every postcode in SW1Y, by flood risk Of the 183 postcodes in SW1Y that ONS places, 183 are not on the Environment Agency's at-risk list. One postcode lies beyond the edge and is listed under the map. Places named: St James's. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. St James's
  • A home or business at high risk: 0
  • At medium risk at worst: 0
  • At low risk at worst: 0
  • At very low risk only: 0
  • Not on the at-risk list: 183

Of the 183 postcodes in SW1Y that ONS places, 183 are not on the Environment Agency's at-risk list.

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

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; flood risk: Environment Agency, published 6 July 2026; 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

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.

SW1Y 5ZQ

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.

Postcodes where every home can get gigabit144 of 168
Postcodes where every home can get superfast144 of 168

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, Spring 2026, data for January 2026, Open Government Licence v3.0. How we use it

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, Risk of Flooding from Rivers and Sea (postcodes in areas at risk), published 6 July 2026, Open Government Licence v3.0. How we use it

What do homes sell for in SW1Y?

Homes in SW1Y sold for a typical £900,000 in the 12 months to August 2026, across 7 sales, HM Land Registry's figures show.

£900,000 typical price, the 12 months to August 2026
  • Flat or maisonette £900,000 7 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 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 SW1Y

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

SW1Y 471 postcodesSW1Y 545 postcodesSW1Y 667 postcodes
UK postcode format explained

Places in SW1Y

Towns and villages with postcodes in SW1Y, and how many each has here.

City of Westminster postcodes,182Wandsworth postcodes,1

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

SW1X postcode district SW2 postcode district All SW districts City of Westminster postcodes

"Next to" is by number: the districts before and after SW1Y in the SW area.

Check a postcode

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