SL4 3NZ maps, stats, and open data
SL4 3NZ lies on Windmill Close in Windsor. SL4 3NZ is located in the Clewer East 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.
SL4 3NZ maps
Source: OS VectorMap District (Ordnance Survey)
Licence: Open Government Licence (requires attribution)
SL4 3NZ geodata
| Easting | 495717 |
| Northing | 176292 |
| Latitude | 51.477500 |
| Longitude | -0.623126 |
Where is SL4 3NZ?
| Street | Windmill Close |
| Town/City | Windsor |
| Country | England |
| Postcode District | SL4 |
SL4 3NZ Elevation
Elevation or altitude of SL4 3NZ 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.
Politics
| Ward | Clewer East |
|---|---|
| Constituency | Windsor |
House Prices
Sales of detached houses in SL4 3NZ
2025 4 SEP £675,000 |
2025 1 JUL £1,090,000 |
2, WINDMILL CLOSE, WINDSOR, SL4 3NZ 2020 9 APR £535,000 |
2016 18 MAY £711,025 |
2016 19 APR £645,000 |
2007 11 JUL £436,000 |
2006 18 MAY £310,000 |
2004 13 DEC £315,000 |
6, WINDMILL CLOSE, WINDSOR, SL4 3NZ 1999 21 DEC £205,000 |
1998 1 MAY £140,000 |
Licence: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.
Transport
Nearest bus stops to SL4 3NZ
| Springfield Road | Windsor | 205m |
| Springfield Road | Windsor | 211m |
| Westmead | Windsor | 283m |
| Westmead | Windsor | 284m |
| Orchard Avenue (Clarence Road) | Windsor | 334m |
Nearest railway stations to SL4 3NZ
| Windsor & Eton Central Station | 1.1km |
| Windsor & Eton Riverside Station | 1.5km |
| Datchet Station | 3.1km |
Broadband
Broadband access in SL4 3NZ (2020 data)
| 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
Broadband speed in SL4 3NZ (2019 data)
Download
| Median download speed | 73.3Mbps |
| Average download speed | 62.0Mbps |
| Maximum download speed | 100.00Mbps |
Upload
| Median upload speed | 11.1Mbps |
| Average upload speed | 10.7Mbps |
| Maximum upload speed | 20.00Mbps |
Broadband limitations in SL4 3NZ (2020 data)
| 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% |
SL4 3NZ gas and electricity consumption
Estimated total energy consumption in SL4 3NZ by fuel type, 2015.
Gas
| Consumption (kWh) | 140,979 |
|---|---|
| Meter count | 8 |
| Mean (kWh/meter) | 17,622 |
| Median (kWh/meter) | 16,488 |
Electricity
| Consumption (kWh) | 26,121 |
|---|---|
| Meter count | 8 |
| Mean (kWh/meter) | 3,265 |
| Median (kWh/meter) | 2,911 |
- Consumption: The estimated total energy consumption, in kWh, across all meters in SL4 3NZ, for 2015.
- Meter count: The total number of meters in SL4 3NZ.
- Mean: The mean average consumption per meter, in kWh.
- Median: The median average consumption per meter, in kWh.
Source: Postcode level electricity estimates: 2015 (experimental)
Licence: Open Government Licence
Deprivation
18.5% of English postcodes are less deprived than SL4 3NZ:Food Standards Agency
Three nearest food hygiene ratings to SL4 3NZ (metres)
➜ Get more ratings from the Food Standards Agency
Nearest post box to SL4 3NZ
| Last Collection | |||
|---|---|---|---|
| Location | Mon-Fri | Sat | Distance |
| Alma Road | 17:15 | 11:30 | 497m |
| Hatch Lane | 17:30 | 11:45 | 621m |
| Saint Leonards Road | 17:15 | 11:30 | 644m |
SL4 3NZ ITL and SL4 3NZ LAU
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 3NZ:
| 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 |
SL4 3NZ census areas
The below table lists the Census Output Area (OA), Lower Layer Super Output Area (LSOA), and Middle Layer Super Output Area (MSOA) for SL4 3NZ:
| Code | Name | |
|---|---|---|
| OA | E00083548 | |
| LSOA | E01016549 | Windsor and Maidenhead 014B |
| MSOA | E02003434 | Windsor and Maidenhead 014 |
Nearest postcodes to SL4 3NZ
| SL4 3PU | Springfield Road | 53m |
| SL4 3RZ | Green Lane | 57m |
| SL4 3PX | Springfield Road | 91m |
| SL4 3PA | York Road | 95m |
| SL4 3SA | Green Lane | 100m |
| SL4 3NY | York Road | 104m |
| SL4 3RX | Imperial Road | 123m |
| SL4 3PZ | Springfield Road | 139m |
| SL4 3YL | Almond Close | 152m |
| SL4 3PY | Combermere Close | 153m |
- Contains OS data © Crown copyright and database right (2026)
- Contains Royal Mail data © Royal Mail copyright and Database right (2026)
- Contains National Statistics data © Crown copyright and database right (2026)
- Data produced by Land Registry © Crown copyright (2026)
- Contains Environment Agency data licensed under the Open Government Licence v3.0
- Everything else © GetTheData Publishing Limited (2026)
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