# SW3

Postcode district covering Chelsea and Brompton, in Kensington and Chelsea.

SW3 is a postcode district covering Chelsea and Brompton, in Kensington and Chelsea. Median sale price £1,500,000 in 2025.

Postcode district. Code SW3. In: [Postcodes](https://openindex.co.uk/postcode) › [SW](https://openindex.co.uk/postcode/sw)

Approximate outline worked out by Open Index from the ONS Postcode Directory: each census output area belongs to the district that holds most of its postcodes. People, homes, recorded crime and broadband add up those output areas. House sales count every sale with an SW3 postcode. [How census figures are added up](https://openindex.co.uk/sources/population)

## Key figures

- **Median sale price: £1,500,000** (2025). The median price paid for a home in SW3 was £1,500,000 in 2025. 10th most expensive of 2,235. Source: Worked out by Open Index from HM Land Registry Price Paid Data. Published 28 September 2026. https://openindex.co.uk/postcode/sw3#f-house-sales-median-price
- **Population: 18,853** (2021). SW3 had 18,853 usual residents at the census (ONS Census 2021). 1,219th least populated of 2,756. Source: Census 2021, England and Wales and Scotland's Census 2022 and Census 2021, Northern Ireland, 2021. Published 21 July 2026. https://openindex.co.uk/postcode/sw3#f-population
- **People in radon Affected Area squares: 0%** (2022). About 0% of people in SW3 live in a 1 km square that the radon atlas marks as a radon Affected Area. UK 44%. Source: Worked out by Open Index from the UKHSA and BGS radon atlas and census output areas. Published 1 December 2022. https://openindex.co.uk/postcode/sw3#f-radon-affected-share
- **Gigabit broadband coverage: 94.8%** (January 2026). In SW3, 94.8% of homes and businesses could get gigabit-capable broadband in January 2026 (Ofcom). UK 87.8%. Source: Connected Nations (Ofcom), January 2026. Published 13 May 2026. https://openindex.co.uk/postcode/sw3#f-gigabit-coverage

## On the map

- [Radon Affected Area by postcode district](https://openindex.co.uk/map/radon-affected-areas#place=SW3) (Worked out by Open Index · 2022): About 0% of people in SW3 live in a 1 km square that the radon atlas marks as a radon Affected Area.
- [Sales per year by postcode district](https://openindex.co.uk/map/house-sales-per-year#place=SW3) (Worked out by Open Index · 2025): 306 homes were sold in SW3 in 2025.
- [Crime and ASB by postcode district](https://openindex.co.uk/map/recorded-crime#place=SW3) (Police recorded crime and outcomes (data.police.uk) · August 2026): Crime and anti-social behaviour for SW3.
- [Population by postcode district](https://openindex.co.uk/map/population#place=SW3) (Census 2021, England and Wales): SW3 had 18,853 usual residents at the census.

## How SW3 compares

Each postcode district against every other postcode district the measure covers.

| Measure | SW3 | Rank | Compared with |
| --- | --- | --- | --- |
| Median sale price | £1,500,000 | 5th most expensive | 26 postcode districts, SW · 2025 |
| Population | 18,853 | 14th least populated | 28 postcode districts, SW · 2021 |
| People in radon Affected Area squares | 0% | – | 28 postcode districts, SW · 2022 |
| Gigabit broadband coverage | 94.8% | 5th highest | 28 postcode districts, SW · Jan 2026 |

## Is SW3 safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in SW3 at a rate of 175.2 per 1,000 people.
That compares with 126.0 per 1,000 people across the SW postcode area.
In August 2026 alone, 262 cases of crime and anti-social behaviour were recorded in SW3.
In the 12 months to August 2026, the most common types were other crime (657), anti-social behaviour (594) and shoplifting (545).
A year earlier, the recorded crime rate in SW3 was 206.6 per 1,000 people.
Worked out by Open Index from police.uk crime records and ONS and NISRA population estimates.
Rates are per resident, so places that many people work in or visit, such as Westminster, the City of London and other city centres, have far higher rates than their residents alone would suggest.

## Deprivation in SW3, neighbourhood by neighbourhood

- Deprivation is ranked by neighbourhood, so SW3 has no single figure. Of its 16 neighbourhoods with a rank:
- Decile 3: 4 neighbourhoods
- Decile 4: 1 neighbourhood
- Decile 6: 2 neighbourhoods
- Decile 7: 5 neighbourhoods
- Decile 8: 3 neighbourhoods
- Decile 9: 1 neighbourhood

Source: English Indices of Deprivation 2025. Decile 1 is the most deprived tenth of neighbourhoods in England.

## Neighbourhoods in SW3

| Area | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
| --- | --- | --- | --- | --- |
| [Kensington and Chelsea 012B](https://openindex.co.uk/kensington-and-chelsea/neighbourhood/e01002819) | 1,088 | 448.8 per 1,000 | 7 | 83.6% |
| [Kensington and Chelsea 012C](https://openindex.co.uk/kensington-and-chelsea/neighbourhood/e01002859) | 1,249 | 406.2 per 1,000 | 8 | 95.1% |
| [Kensington and Chelsea 012D](https://openindex.co.uk/kensington-and-chelsea/neighbourhood/e01002860) | 1,144 | 102.4 per 1,000 | 7 | 97.7% |
| [Kensington and Chelsea 014A](https://openindex.co.uk/kensington-and-chelsea/neighbourhood/e01002821) | 1,080 | 448.9 per 1,000 | 7 | 90.3% |
| [Kensington and Chelsea 014B](https://openindex.co.uk/kensington-and-chelsea/neighbourhood/e01002823) | 1,224 | 167.8 per 1,000 | 3 | 98.8% |
| [Kensington and Chelsea 014C](https://openindex.co.uk/kensington-and-chelsea/neighbourhood/e01002858) | 1,323 | 139.4 per 1,000 | 4 | 99.9% |
| [Kensington and Chelsea 014D](https://openindex.co.uk/kensington-and-chelsea/neighbourhood/e01002861) | 1,256 | 89.0 per 1,000 | 6 | 96.5% |
| [Kensington and Chelsea 014E](https://openindex.co.uk/kensington-and-chelsea/neighbourhood/e01002862) | 1,089 | 124.2 per 1,000 | 3 | 100.0% |
| [Kensington and Chelsea 018A](https://openindex.co.uk/kensington-and-chelsea/neighbourhood/e01002899) | 1,250 | 59.0 per 1,000 | 3 | 96.0% |
| [Kensington and Chelsea 018B](https://openindex.co.uk/kensington-and-chelsea/neighbourhood/e01002900) | 1,690 | 65.0 per 1,000 | 8 | 97.7% |
| [Kensington and Chelsea 018C](https://openindex.co.uk/kensington-and-chelsea/neighbourhood/e01002901) | 1,041 | 99.9 per 1,000 | 7 | 93.4% |
| [Kensington and Chelsea 018E](https://openindex.co.uk/kensington-and-chelsea/neighbourhood/e01002903) | 1,276 | 210.7 per 1,000 | 8 | 84.8% |
| [Kensington and Chelsea 019A](https://openindex.co.uk/kensington-and-chelsea/neighbourhood/e01002844) | 1,147 | 130.8 per 1,000 | 6 | 92.9% |
| [Kensington and Chelsea 019B](https://openindex.co.uk/kensington-and-chelsea/neighbourhood/e01002845) | 1,169 | 112.0 per 1,000 | 3 | 95.4% |
| [Kensington and Chelsea 019D](https://openindex.co.uk/kensington-and-chelsea/neighbourhood/e01002911) | 1,285 | 235.4 per 1,000 | 7 | 96.5% |
| [Kensington and Chelsea 019E](https://openindex.co.uk/kensington-and-chelsea/neighbourhood/e01002914) | 1,194 | 424.8 per 1,000 | 9 | 89.2% |

## Your MP

- [Chelsea and Fulham](https://openindex.co.uk/constituency/chelsea-and-fulham): Ben Coleman (Labour), MP since July 2024. 68% of the people here.
- [Kensington and Bayswater](https://openindex.co.uk/constituency/kensington-and-bayswater): Joe Powell (Labour), MP since July 2024. 29% of the people here.
- [Clapham and Brixton Hill](https://openindex.co.uk/constituency/clapham-and-brixton-hill): Bell Ribeiro-Addy (Labour), MP since July 2024. 3.0% of the people here.
- [Cities of London and Westminster](https://openindex.co.uk/constituency/cities-of-london-and-westminster): Rachel Blake (Labour (Co-op)), MP since July 2024. 0.7% of the people here.

As of 18 October 2026. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. Source: UK Parliament, Members API.

## Middle areas in SW3

[Brompton](https://openindex.co.uk/kensington-and-chelsea/brompton), [Chelsea Manor & Royal Hospital](https://openindex.co.uk/kensington-and-chelsea/chelsea-manor-and-royal-hospital), [Chelsea Riverside East](https://openindex.co.uk/kensington-and-chelsea/chelsea-riverside-east), [Hans Town](https://openindex.co.uk/kensington-and-chelsea/hans-town)

## Postcode sectors in SW3

[SW3 1 (80 postcodes)](https://openindex.co.uk/postcode/sw3-1), [SW3 2 (140 postcodes)](https://openindex.co.uk/postcode/sw3-2), [SW3 3 (174 postcodes)](https://openindex.co.uk/postcode/sw3-3), [SW3 4 (150 postcodes)](https://openindex.co.uk/postcode/sw3-4), [SW3 5 (186 postcodes)](https://openindex.co.uk/postcode/sw3-5), [SW3 6 (117 postcodes)](https://openindex.co.uk/postcode/sw3-6), [SW3 9 (21 postcodes)](https://openindex.co.uk/postcode/sw3-9)

## Council

[Kensington and Chelsea](https://openindex.co.uk/kensington-and-chelsea)

## Towns in SW3

[Kensington and Chelsea](https://openindex.co.uk/kensington-and-chelsea)

## Postcode districts next to SW3

[SW1V](https://openindex.co.uk/postcode/sw1v), [SW1W](https://openindex.co.uk/postcode/sw1w), [SW1X](https://openindex.co.uk/postcode/sw1x), [SW7](https://openindex.co.uk/postcode/sw7), [SW10](https://openindex.co.uk/postcode/sw10)

## Nearest rail stations

[Sloane Square (850 m from the middle)](https://openindex.co.uk/map/rail-stations#around=-0.1564,51.4923), [South Kensington (850 m from the middle)](https://openindex.co.uk/map/rail-stations#around=-0.1741,51.4941), [Gloucester Road (1.3 km from the middle)](https://openindex.co.uk/map/rail-stations#around=-0.1827,51.4943), [Knightsbridge (1.5 km from the middle)](https://openindex.co.uk/map/rail-stations#around=-0.1605,51.5017)

## More in the SW postcode area

[All SW postcode districts](https://openindex.co.uk/postcode/sw), [Every UK postcode area](https://openindex.co.uk/postcode)

## SW3 in brief

SW3 is a postcode district covering Chelsea and Brompton, in Kensington and Chelsea.
About 19,471 people lived in SW3 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £1,500,000 in 2025 across 306 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 175.2 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in SW3 was £1,500,000 in 2025.
SW3 had 18,853 usual residents at the census.
About 0% of people in SW3 live in a 1 km square that the radon atlas marks as a radon Affected Area.
In SW3, 94.8% of homes and businesses could get gigabit-capable broadband in January 2026.

## About

- Type: Postcode district
- Code: SW3
- Postcode area: [SW](https://openindex.co.uk/postcode/sw)
- Constituency: [Chelsea and Fulham †](https://openindex.co.uk/constituency/chelsea-and-fulham)
- Council: [Kensington and Chelsea †](https://openindex.co.uk/kensington-and-chelsea)
- Area: 1.89 km²
- People, mid-2024: 19,471*
- Neighbourhoods: 16
- Output areas: 93

* People: worked out by Open Index from neighbourhood estimates, shared out by where people lived at the census (by area in Northern Ireland). This area's edges do not follow neighbourhood edges, so the figure is close but not exact.
† Best fit: the constituency, council, region and nation this postcode district mostly lies in. Its edges do not follow theirs.

## Next door

[SW1X](https://openindex.co.uk/postcode/sw1x), [SW7](https://openindex.co.uk/postcode/sw7), [SW10](https://openindex.co.uk/postcode/sw10), [SW1W](https://openindex.co.uk/postcode/sw1w), [SW1V](https://openindex.co.uk/postcode/sw1v)

## Latest updates for SW3

- August 2026 house prices published: HM Land Registry and partners · Oct 2026.
- September 2026 rent published: ONS private rents · Oct 2026.
- Dental practices updated: NHS England · Oct 2026.
- Schools updated: Ofsted · Oct 2026.

The same figures as JSON: https://openindex.co.uk/v1/places/SW3

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/postcode/sw3, or to one figure with its anchor, https://openindex.co.uk/postcode/sw3#f-house-sales-median-price.

Open Index's own text and the figures it works out are licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source data keeps its publishers' licences, named with each figure. Give each figure's period and source with it.

Snapshot 2026.10.11. The HTML page: https://openindex.co.uk/postcode/sw3