SL4
Postcode districtPostcode district covering Windsor and Dedworth, in Windsor and Maidenhead.
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 SL4 postcode. How census figures are added up
Gigabit coverage by postcode district
Connected Nations (Ofcom) · January 2026
In SL4, 83.5% of homes and businesses could get gigabit-capable broadband in January 2026.
How SL4 compares
Each dot is a postcode district. The black line marks the middle one.
Is SL4 safe? What police records show
In the 12 months to August 2026, police recorded crimes and anti-social behaviour in SL4 at a rate of 83.8 per 1,000 people.
That compares with 77.9 per 1,000 people across SL.
In August 2026 alone, 336 cases of crime and anti-social behaviour were recorded in SL4.
In the 12 months to August 2026, the most common types were violence and sexual offences (1,318), other crime (844) and anti-social behaviour (439).
A year earlier, the recorded crime rate in SL4 was 79.0 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 SL4, neighbourhood by neighbourhood
- Deprivation is ranked by neighbourhood, so SL4 has no single figure. Of its 25 neighbourhoods with a rank:
- Decile 4: 1 neighbourhood
- Decile 5: 1 neighbourhood
- Decile 6: 3 neighbourhoods
- Decile 7: 3 neighbourhoods
- Decile 8: 6 neighbourhoods
- Decile 9: 5 neighbourhoods
- Decile 10 (England’s least deprived 10%): 6 neighbourhoods
English Indices of Deprivation 2025. Decile 1 is the most deprived tenth of neighbourhoods in England.
Neighbourhoods in SL4
| Name | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
|---|---|---|---|---|
| Bracknell Forest 001C | 1,492 | 36.4 per 1,000 | 8 | 93.4% |
| Windsor and Maidenhead 010A | 2,004 | 389.1 per 1,000 | 8 | 48.1% |
| Windsor and Maidenhead 010B | 3,173 | 110.6 per 1,000 | 9 | 40.8% |
| Windsor and Maidenhead 010C | 1,283 | 47.7 per 1,000 | 7 | 99.8% |
| Windsor and Maidenhead 010D | 1,061 | 78.2 per 1,000 | 6 | 91.1% |
| Windsor and Maidenhead 012A | 2,117 | 103.5 per 1,000 | 7 | 64.1% |
| Windsor and Maidenhead 012B | 1,753 | 154.8 per 1,000 | 8 | 95.7% |
| Windsor and Maidenhead 012C | 1,484 | 38.5 per 1,000 | 9 | 94.5% |
| Windsor and Maidenhead 012D | 1,742 | 97.7 per 1,000 | 9 | 91.3% |
| Windsor and Maidenhead 013A | 1,581 | 58.3 per 1,000 | 10 | 98.1% |
| Windsor and Maidenhead 013B | 1,500 | 53.8 per 1,000 | 8 | 84.5% |
| Windsor and Maidenhead 013C | 1,944 | 78.6 per 1,000 | 8 | 94.3% |
| Windsor and Maidenhead 013D | 1,446 | 37.4 per 1,000 | 7 | 93.2% |
| Windsor and Maidenhead 014A | 1,903 | 35.7 per 1,000 | 10 | 80.3% |
| Windsor and Maidenhead 014B | 2,015 | 54.7 per 1,000 | 8 | 86.2% |
| Windsor and Maidenhead 014C | 1,775 | 70.5 per 1,000 | 5 | 96.5% |
| Windsor and Maidenhead 014D | 1,632 | 107.5 per 1,000 | 4 | 95.2% |
| Windsor and Maidenhead 014E | 1,867 | 61.7 per 1,000 | 6 | 95.4% |
| Windsor and Maidenhead 015A | 1,622 | 62.5 per 1,000 | 10 | 94.1% |
| Windsor and Maidenhead 015B | 1,834 | 50.1 per 1,000 | 9 | 89.6% |
| Windsor and Maidenhead 015C | 1,964 | 42.7 per 1,000 | 10 | 86.9% |
| Windsor and Maidenhead 015D | 1,722 | 49.0 per 1,000 | 10 | 80.0% |
| Windsor and Maidenhead 016C | 1,757 | 27.5 per 1,000 | 9 | 97.7% |
| Windsor and Maidenhead 016D | 1,826 | 81.6 per 1,000 | 6 | 88.3% |
| Windsor and Maidenhead 016E | 1,739 | 59.8 per 1,000 | 10 | 80.3% |
MPs for SL4
- Jack RankinConservativeMP for Windsor89% of SL4’s postcodes
- Mr Joshua ReynoldsLiberal DemocratMP for Maidenhead9.0% of SL4’s postcodes
- Joy MorrisseyConservativeMP for Beaconsfield1.5% of SL4’s postcodes
- Mr Tanmanjeet Singh DhesiLabourMP for Slough0.1% of SL4’s postcodes
As of , from the UK Parliament Members API. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. Source: UK Parliament, Members API.
Middle areas in SL46
Postcode sectors in SL47
Council1
Towns in SL42
Postcode districts next to SL48
Nearest rail stations4
More in the SL postcode area2
SL4 in brief
SL4 is a postcode district covering Windsor and Dedworth, in Windsor and Maidenhead.
About 47,013 people lived in SL4 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £517,250 in 2025 across 582 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 83.8 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in SL4 was £517,250 in 2025.
SL4 had 45,871 usual residents at the census.
In SL4, 83.5% of homes and businesses could get gigabit-capable broadband in January 2026.
In SL4, 2.5% of residents aged 16 to 64 were claiming out-of-work benefits in August 2026.