SL4 1SA lies on Duke Street in Windsor. SL4 1SA is located in the Eton & Castle electoral ward, within the unitary authority of Windsor and Maidenhead and the English Parliamentary constituency of Windsor. The Sub Integrated Care Board (ICB) Location is NHS Frimley ICB - D4U1Y and the police force is Thames Valley. This postcode has been in use since January 1980.
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Source: OS OpenMap – Local (Ordnance Survey)
Source: OS VectorMap District (Ordnance Survey)
Licence: Open Government Licence (requires attribution)
| Easting | 496060 |
| Northing | 177002 |
| Latitude | 51.483824 |
| Longitude | -0.617996 |
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Source: Open Postcode Geo
Licence: Open Government Licence
| Street | Duke Street |
| Town/City | Windsor |
| Country | England |
| Postcode District | SL4 |
➜ See where SL4 is on a map ➜ Where is Windsor? | |
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Source: Land Registry Price Paid Data
Licence: Open Government Licence
Elevation or altitude of SL4 1SA as distance above sea level:
| Metres | Feet | |
|---|---|---|
| Elevation | 20m | 66ft |
Elevation is measured from the approximate centre of the postcode, to the nearest point on an OS contour line from OS Terrain 50, which has contour spacing of ten vertical metres.
➜ How high above sea level am I? Find the elevation of your current position using your device's GPS.
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Source: Open Postcode Elevation
Licence: Open Government Licence
| Ward | Eton & Castle |
| Constituency | Windsor |
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Source: ONS Postcode Database
Licence: Open Government Licence
20, DUKE STREET, WINDSOR, SL4 1SA 2005 9 SEP £242,000 |
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Source: HM Land Registry Price Paid Data
Licence: Contains HM Land Registry data © Crown copyright and database right 2025. This data is licensed under the Open Government Licence v3.0.
| St Stephens Church (Vansittart Road) | Windsor | 173m |
| St Stephens Church (Vansittart Road) | Windsor | 176m |
| Boys School (Maidenhead Road) | Windsor | 288m |
| Boys School (Maidenhead Road) | Windsor | 313m |
| Arthur Road | Windsor | 328m |
| Windsor & Eton Central Station | 0.5km |
| Windsor & Eton Riverside Station | 0.8km |
| Datchet Station | 2.7km |
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Source: NaPTAN
Licence: Open Government Licence
| Percentage of properties with Next Generation Access | 100.0% |
| Percentage of properties with Superfast Broadband | 100.0% |
| Percentage of properties with Ultrafast Broadband | 100.0% |
| Percentage of properties with Full Fibre Broadband | 0.0% |
Superfast Broadband is between 30Mbps and 300Mbps
Ultrafast Broadband is > 300Mbps
| Median download speed | 39.1Mbps |
| Average download speed | 75.2Mbps |
| Maximum download speed | 350.00Mbps |
| Median upload speed | 6.8Mbps |
| Average upload speed | 6.3Mbps |
| Maximum upload speed | 17.48Mbps |
| Percentage of properties unable to receive 2Mbps | 0.0% |
| Percentage of properties unable to receive 5Mbps | 0.0% |
| Percentage of properties unable to receive 10Mbps | 0.0% |
| Percentage of properties unable to receive 30Mbps | 0.0% |
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Source: Ofcom
Licence: Ofcom Terms of Use (requires attribution)
Estimated total energy consumption in SL4 1SA by fuel type, 2015.
| Consumption (kWh) | 274,819 |
|---|---|
| Meter count | 22 |
| Mean (kWh/meter) | 12,492 |
| Median (kWh/meter) | 13,077 |
| Consumption (kWh) | 69,957 |
|---|---|
| Meter count | 21 |
| Mean (kWh/meter) | 3,331 |
| Median (kWh/meter) | 2,390 |
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Source: Postcode level gas estimates: 2015 (experimental)
Source: Postcode level electricity estimates: 2015 (experimental)
Licence: Open Government Licence
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Source: ONS Postcode Database
Licence: Open Government Licence
➜ Get more ratings from the Food Standards Agency
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Source: Food Standards Agency
Licence: FSA terms & conditions
| Last Collection | |||
|---|---|---|---|
| Location | Mon-Fri | Sat | Distance |
| Goswell Road | 17:15 | 09:00 | 476m |
| Alma Road | 17:15 | 11:30 | 563m |
| Bachelors Acre | 17:15 | 11:45 | 601m |
GetTheData
Source: Dracos
Licence: Creative Commons Attribution-ShareAlike
| Risk of SL4 1SA flooding from rivers and sea | Low |
| ➜ SL4 1SA flood map | |
GetTheData
Source: Open Flood Risk by Postcode
Licence: Open Government Licence
The below table lists the International Territorial Level (ITL) codes (formerly Nomenclature of Territorial Units for Statistics (NUTS) codes) and Local Administrative Units (LAU) codes for SL4 1SA:
| ITL 1 Code | Name |
|---|---|
| TLJ | South East (England) |
| ITL 2 Code | Name |
| TLJ1 | Berkshire, Buckinghamshire and Oxfordshire |
| ITL 3 Code | Name |
| TLJ11 | Berkshire |
| LAU 1 Code | Name |
| E06000040 | Windsor and Maidenhead |
GetTheData
Source: ONS Postcode Directory
Licence: Open Government Licence
The below table lists the Census Output Area (OA), Lower Layer Super Output Area (LSOA), and Middle Layer Super Output Area (MSOA) for SL4 1SA:
| Code | Name | |
|---|---|---|
| OA | E00083544 | |
| LSOA | E01016547 | Windsor and Maidenhead 012B |
| MSOA | E02003432 | Windsor and Maidenhead 012 |
GetTheData
Source: ONS Postcode Directory
Licence: Open Government Licence
| SL4 1SH | Duke Street | 26m |
| SL4 1SJ | Duke Street | 76m |
| SL4 1RZ | Arthur Road | 83m |
| SL4 1SQ | Duke Street | 95m |
| SL4 1RY | Arthur Road | 99m |
| SL4 5BY | Vansittart Road | 100m |
| SL4 1RU | Arthur Road | 108m |
| SL4 5JA | Barry Avenue | 120m |
| SL4 5DA | Vansittart Road | 124m |
| SL4 5BZ | Vansittart Road | 152m |
GetTheData
Source: Open Postcode Geo; Land Registry Price Paid Data
Licence: Open Government Licence
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