# SL1

Postcode district covering Slough, Cippenham and Salt Hill, in Slough and Buckinghamshire.

SL1 is a postcode district covering Slough, Cippenham and Salt Hill, in Slough and Buckinghamshire. Median sale price £395,931 in 2025.

Postcode district. Code SL1. In: [Postcodes](https://openindex.co.uk/postcode) › [SL](https://openindex.co.uk/postcode/sl)

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 SL1 postcode. [How census figures are added up](https://openindex.co.uk/sources/population)

## Key figures

- **Median sale price: £395,931** (2025). The median price paid for a home in SL1 was £395,931 in 2025. 614th 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/sl1#f-house-sales-median-price
- **Population: 79,692** (2021). SL1 had 79,692 usual residents at the census (ONS Census 2021). 25th most 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/sl1#f-population
- **People in radon Affected Area squares: 21%** (2022). About 21% of people in SL1 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/sl1#f-radon-affected-share
- **Gigabit broadband coverage: 96.6%** (January 2026). In SL1, 96.6% 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/sl1#f-gigabit-coverage

## On the map

- [Radon Affected Area by postcode district](https://openindex.co.uk/map/radon-affected-areas?place=SL1) (Worked out by Open Index · 2022): About 21% of people in SL1 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=SL1) (Worked out by Open Index · 2025): 582 homes were sold in SL1 in 2025.
- [Crime and ASB by postcode district](https://openindex.co.uk/map/recorded-crime?place=SL1) (Police recorded crime and outcomes (data.police.uk) · August 2026): Crime and anti-social behaviour for SL1.
- [Population by postcode district](https://openindex.co.uk/map/population?place=SL1) (Census 2021, England and Wales): SL1 had 79,692 usual residents at the census.

## How SL1 compares

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

| Measure | SL1 | Rank | Compared with |
| --- | --- | --- | --- |
| Median sale price | £395,931 | cheapest | 10 postcode districts, SL · 2025 |
| Population | 79,692 | 2nd most populated | 12 postcode districts, SL · 2021 |
| People in radon Affected Area squares | 21% | 6th fewest people in radon Affected Areas | 12 postcode districts, SL · 2022 |
| Gigabit broadband coverage | 96.6% | 2nd highest | 12 postcode districts, SL · Jan 2026 |

## Is SL1 safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in SL1 at a rate of 123.4 per 1,000 people.
That compares with 77.9 per 1,000 people across the SL postcode area.
In August 2026 alone, 877 cases of crime and anti-social behaviour were recorded in SL1.
In the 12 months to August 2026, the most common types were violence and sexual offences (3,826), other crime (2,153) and anti-social behaviour (1,044).
A year earlier, the recorded crime rate in SL1 was 115.3 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 SL1, neighbourhood by neighbourhood

- Deprivation is ranked by neighbourhood, so SL1 has no single figure. Of its 42 neighbourhoods with a rank:
- Decile 2: 5 neighbourhoods
- Decile 3: 9 neighbourhoods
- Decile 4: 8 neighbourhoods
- Decile 5: 8 neighbourhoods
- Decile 6: 4 neighbourhoods
- Decile 7: 4 neighbourhoods
- Decile 8: 2 neighbourhoods
- Decile 10 (England’s least deprived 10%): 2 neighbourhoods

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

## Neighbourhoods in SL1

| Area | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
| --- | --- | --- | --- | --- |
| [Buckinghamshire 065A](https://openindex.co.uk/buckinghamshire/neighbourhood/e01017803) | 1,391 | 57.2 per 1,000 | 8 | 54.1% |
| [Buckinghamshire 065B](https://openindex.co.uk/buckinghamshire/neighbourhood/e01017806) | 1,743 | 49.9 per 1,000 | 10 | 96.1% |
| [Buckinghamshire 066A](https://openindex.co.uk/buckinghamshire/neighbourhood/e01017804) | 1,635 | 132.2 per 1,000 | 8 | 94.4% |
| [Buckinghamshire 066B](https://openindex.co.uk/buckinghamshire/neighbourhood/e01017805) | 1,932 | 51.5 per 1,000 | 5 | 98.0% |
| [Buckinghamshire 066D](https://openindex.co.uk/buckinghamshire/neighbourhood/e01017808) | 1,648 | 65.3 per 1,000 | 7 | 99.7% |
| [Buckinghamshire 066E](https://openindex.co.uk/buckinghamshire/neighbourhood/e01017809) | 1,643 | 53.5 per 1,000 | 6 | 99.8% |
| [Slough 002A](https://openindex.co.uk/slough/neighbourhood/e01016483) | 2,114 | 247.6 per 1,000 | 2 | 98.9% |
| [Slough 002E](https://openindex.co.uk/slough/neighbourhood/e01016487) | 1,828 | 112.7 per 1,000 | 5 | 99.8% |
| [Slough 003A](https://openindex.co.uk/slough/neighbourhood/e01016493) | 1,252 | 43.6 per 1,000 | 7 | 99.6% |
| [Slough 003B](https://openindex.co.uk/slough/neighbourhood/e01016494) | 1,906 | 192.3 per 1,000 | 5 | 94.9% |
| [Slough 003C](https://openindex.co.uk/slough/neighbourhood/e01016495) | 1,466 | 48.7 per 1,000 | 7 | 100.0% |
| [Slough 003D](https://openindex.co.uk/slough/neighbourhood/e01016496) | 1,372 | 69.6 per 1,000 | 4 | 100.0% |
| [Slough 003E](https://openindex.co.uk/slough/neighbourhood/e01016497) | 1,423 | 96.6 per 1,000 | 10 | 100.0% |
| [Slough 004B](https://openindex.co.uk/slough/neighbourhood/e01016445) | 1,932 | 65.5 per 1,000 | 3 | 100.0% |
| [Slough 004C](https://openindex.co.uk/slough/neighbourhood/e01016446) | 1,735 | 47.2 per 1,000 | 4 | 100.0% |
| [Slough 004D](https://openindex.co.uk/slough/neighbourhood/e01016447) | 1,882 | 81.8 per 1,000 | 4 | 99.0% |
| [Slough 004E](https://openindex.co.uk/slough/neighbourhood/e01016448) | 2,454 | 69.0 per 1,000 | 4 | 99.4% |
| [Slough 006A](https://openindex.co.uk/slough/neighbourhood/e01016467) | 1,567 | 109.1 per 1,000 | 4 | 99.3% |
| [Slough 006B](https://openindex.co.uk/slough/neighbourhood/e01016468) | 1,995 | 84.0 per 1,000 | 7 | 91.2% |
| [Slough 006C](https://openindex.co.uk/slough/neighbourhood/e01016469) | 1,821 | 83.0 per 1,000 | 5 | 98.7% |
| [Slough 006D](https://openindex.co.uk/slough/neighbourhood/e01016470) | 1,775 | 93.2 per 1,000 | 6 | 97.9% |
| [Slough 006E](https://openindex.co.uk/slough/neighbourhood/e01016471) | 1,472 | 64.7 per 1,000 | 6 | 100.0% |
| [Slough 006F](https://openindex.co.uk/slough/neighbourhood/e01016472) | 1,775 | 39.1 per 1,000 | 5 | 100.0% |
| [Slough 008A](https://openindex.co.uk/slough/neighbourhood/e01016473) | 2,722 | 55.3 per 1,000 | 6 | 99.9% |
| [Slough 008B](https://openindex.co.uk/slough/neighbourhood/e01016474) | 2,167 | 125.1 per 1,000 | 3 | 99.8% |
| [Slough 008C](https://openindex.co.uk/slough/neighbourhood/e01016475) | 2,243 | 82.8 per 1,000 | 3 | 99.9% |
| [Slough 008D](https://openindex.co.uk/slough/neighbourhood/e01016476) | 1,806 | 71.2 per 1,000 | 5 | 100.0% |
| [Slough 008E](https://openindex.co.uk/slough/neighbourhood/e01016477) | 2,844 | 66.9 per 1,000 | 5 | 97.5% |
| [Slough 008F](https://openindex.co.uk/slough/neighbourhood/e01016478) | 1,971 | 58.4 per 1,000 | 5 | 100.0% |
| [Slough 009A](https://openindex.co.uk/slough/neighbourhood/e01016462) | 2,573 | 262.1 per 1,000 | 3 | 99.6% |
| [Slough 009B](https://openindex.co.uk/slough/neighbourhood/e01016463) | 2,032 | 126.2 per 1,000 | 2 | 99.0% |
| [Slough 009C](https://openindex.co.uk/slough/neighbourhood/e01016464) | 2,245 | 104.2 per 1,000 | 2 | 99.4% |
| [Slough 009D](https://openindex.co.uk/slough/neighbourhood/e01016465) | 2,908 | 171.6 per 1,000 | 3 | 99.5% |
| [Slough 009F](https://openindex.co.uk/slough/neighbourhood/e01032729) | 1,798 | 85.2 per 1,000 | 3 | 96.2% |
| [Slough 009G](https://openindex.co.uk/slough/neighbourhood/e01032730) | 1,950 | 163.3 per 1,000 | 3 | 99.1% |
| [Slough 011A](https://openindex.co.uk/slough/neighbourhood/e01016511) | 2,381 | 150.6 per 1,000 | 2 | 87.1% |
| [Slough 011D](https://openindex.co.uk/slough/neighbourhood/e01016514) | 2,045 | 93.7 per 1,000 | 4 | 93.2% |
| [Slough 011F](https://openindex.co.uk/slough/neighbourhood/e01035247) | 1,473 | 562.2 per 1,000 | 3 | 84.4% |
| [Slough 011G](https://openindex.co.uk/slough/neighbourhood/e01035248) | 1,634 | 179.4 per 1,000 | 3 | 88.6% |
| [Slough 015B](https://openindex.co.uk/slough/neighbourhood/e01035251) | 2,313 | 114.7 per 1,000 | 4 | 99.5% |
| [Slough 015C](https://openindex.co.uk/slough/neighbourhood/e01035252) | 1,317 | 55.9 per 1,000 | 4 | 99.2% |
| [Slough 016D](https://openindex.co.uk/slough/neighbourhood/e01016456) | 2,214 | 325.8 per 1,000 | 2 | 97.7% |

## Your MP

- [Slough](https://openindex.co.uk/constituency/slough): Mr Tanmanjeet Singh Dhesi (Labour), MP since July 2024. 82% of the people here.
- [Beaconsfield](https://openindex.co.uk/constituency/beaconsfield): Joy Morrissey (Conservative), MP since July 2024. 18% 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 SL1

[Baylis & Stoke](https://openindex.co.uk/slough/baylis-and-stoke), [Burham North, Taplow & Dorney](https://openindex.co.uk/buckinghamshire/burham-north-taplow-and-dorney), [Burnham South](https://openindex.co.uk/buckinghamshire/burnham-south), [Central Slough & Upton Court](https://openindex.co.uk/slough/central-slough-and-upton-court), [Chalvey](https://openindex.co.uk/slough/chalvey), [Cippenham Green](https://openindex.co.uk/slough/cippenham-green), [Cippenham Meadows](https://openindex.co.uk/slough/cippenham-meadows), [Elliman](https://openindex.co.uk/slough/elliman), [Haymill & Lynch Hill](https://openindex.co.uk/slough/haymill-and-lynch-hill)

## Postcode sectors in SL1

[SL1 0 (104 postcodes)](https://openindex.co.uk/postcode/sl1-0), [SL1 1 (182 postcodes)](https://openindex.co.uk/postcode/sl1-1), [SL1 2 (287 postcodes)](https://openindex.co.uk/postcode/sl1-2), [SL1 3 (264 postcodes)](https://openindex.co.uk/postcode/sl1-3), [SL1 4 (98 postcodes)](https://openindex.co.uk/postcode/sl1-4), [SL1 5 (250 postcodes)](https://openindex.co.uk/postcode/sl1-5), [SL1 6 (123 postcodes)](https://openindex.co.uk/postcode/sl1-6), [SL1 7 (127 postcodes)](https://openindex.co.uk/postcode/sl1-7), [SL1 8 (162 postcodes)](https://openindex.co.uk/postcode/sl1-8), [SL1 9 (57 postcodes)](https://openindex.co.uk/postcode/sl1-9)

## Councils SL1 covers

[Slough](https://openindex.co.uk/slough), [Buckinghamshire](https://openindex.co.uk/buckinghamshire)

## Towns in SL1

[Slough](https://openindex.co.uk/slough)

## Postcode districts next to SL1

[HP9](https://openindex.co.uk/postcode/hp9), [HP10](https://openindex.co.uk/postcode/hp10), [SL2](https://openindex.co.uk/postcode/sl2), [SL3](https://openindex.co.uk/postcode/sl3), [SL4](https://openindex.co.uk/postcode/sl4), [SL6](https://openindex.co.uk/postcode/sl6)

## Nearest rail stations

[Slough (1.8 km from the middle)](https://openindex.co.uk/map/rail-stations?around=-0.5915,51.5119), [Burnham (Buckinghamshire) (2.3 km from the middle)](https://openindex.co.uk/map/rail-stations?around=-0.6464,51.5235), [Windsor and Eton Riverside (3.2 km from the middle)](https://openindex.co.uk/map/rail-stations?around=-0.6065,51.4856), [Windsor and Eton Central (3.5 km from the middle)](https://openindex.co.uk/map/rail-stations?around=-0.6104,51.4833)

## More in the SL postcode area

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

## SL1 in brief

SL1 is a postcode district covering Slough, Cippenham and Salt Hill, in Slough and Buckinghamshire.
About 85,032 people lived in SL1 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £395,931 in 2025 across 582 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 123.4 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in SL1 was £395,931 in 2025.
SL1 had 79,692 usual residents at the census.
About 21% of people in SL1 live in a 1 km square that the radon atlas marks as a radon Affected Area.
In SL1, 96.6% of homes and businesses could get gigabit-capable broadband in January 2026.

## About

- Type: Postcode district
- Code: SL1
- Postcode area: [SL](https://openindex.co.uk/postcode/sl)
- Constituency: [Slough †](https://openindex.co.uk/constituency/slough)
- Council: [Slough †](https://openindex.co.uk/slough)
- Area: 25.54 km²
- People, mid-2024: 85,032*
- Neighbourhoods: 42
- Output areas: 215

* 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

[SL2](https://openindex.co.uk/postcode/sl2), [SL6](https://openindex.co.uk/postcode/sl6), [SL4](https://openindex.co.uk/postcode/sl4), [HP10](https://openindex.co.uk/postcode/hp10), [SL3](https://openindex.co.uk/postcode/sl3), [HP9](https://openindex.co.uk/postcode/hp9)

## Latest updates for SL1

- 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/SL1

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/postcode/sl1, or to one figure with its anchor, https://openindex.co.uk/postcode/sl1#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 2026.10.9. The HTML page: https://openindex.co.uk/postcode/sl1