SW1P postcode district: City of Westminster and around

SW1P is a postcode district in England, with 752 postcodes in use in 5 sectors. It has postcodes in City of Westminster and Wandsworth. It is split between 2 councils: Westminster (472 postcodes) and Wandsworth (280).

Postcodes in use: 752
Sectors: 5
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 SW1P, and which are new since 2020

New since 2020: 103
In use before 2020: 649
Outline: where 5 or more new postcodes since 2020 lie together

Of the 752 postcodes in SW1P that ONS places, 103 are new since 2020 and 649 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. 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 51.4898, longitude -0.1327. 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; when each came into use: the same directory; 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

The 5 newest postcodes

SW1P 2PNJuly 2026 SW1P 9EQJuly 2026 SW1P 9TXJune 2026 SW1P 9USJune 2026 SW1P 9TRMay 2026

Where the new postcodes lie together

98 new postcodes since 2020, outlined on the map. SW1P 9EQ, is the newest of them.

What broadband can you get in SW1P?

Ofcom reports on 457 of the 752 postcodes in SW1P. At 389 of them every home and business can get gigabit broadband.

Postcodes where every home can get gigabit389 of 457

Postcodes where every home can get superfast407 of 457

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 SW1P at risk of flooding?

403 of the 752 postcodes in SW1P 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 2 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 403 of 752 postcodes High: 2Very low: 8,650

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, 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 SW1P?

Homes in SW1P sold for a typical £725,000 in the 12 months to August 2026, across 105 sales, down 13.2% on the 12 months before, HM Land Registry's figures show.

£725,000 typical price, the 12 months to August 2026

£835,000 12 months to August 2025

▼ down 13.2% on the 12 months before

Semi-detached 1 sale, too few to price
Terraced £2,275,000 6 sales
Flat or maisonette £700,000 98 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 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