CM20 3SY maps, stats, and open data
CM20 3SY lies on Greenhills in Harlow. CM20 3SY is located in the Netteswell electoral ward, within the local authority district of Harlow and the English Parliamentary constituency of Harlow. The Sub Integrated Care Board (ICB) Location is NHS Hertfordshire and West Essex ICB - 07H and the police force is Essex. This postcode has been in use since January 1980.
CM20 3SY maps
Licence: Open Government Licence (requires attribution)
Attribution: Contains OS data © Crown copyright and database right 2026
Source: Open Postcode Geo
Licence: Open Government Licence (requires attribution)
Attribution: Contains OS data © Crown copyright and database right 2026; Contains Royal Mail data © Royal Mail copyright and database right 2026; Source: Office for National Statistics licensed under the Open Government Licence v.3.0
CM20 3SY geodata
| Easting | 545071 |
| Northing | 209874 |
| Latitude | 51.768752 |
| Longitude | 0.101011 |
Where is CM20 3SY?
| Street | Greenhills |
| Town/City | Harlow |
| Country | England |
| Postcode District | CM20 |
CM20 3SY Elevation
Elevation or altitude of CM20 3SY as distance above sea level:
| Metres | Feet | |
|---|---|---|
| Elevation | 70m | 230ft |
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 | Netteswell |
|---|---|
| Constituency | Harlow |
Transport
Nearest bus stops to CM20 3SY
| Leisure Centre (Second Avenue) | Harlow | 198m |
| Leisure Centre (Second Avenue) | Harlow | 226m |
| College Grounds (Velizy Avenue) | Harlow Town Centre | 256m |
| Garden Tiger (Maddox Road) | Harlow | 332m |
| Garden Tiger (Maddox Road) | Harlow | 340m |
Nearest railway stations to CM20 3SY
| Harlow Town Station | 1.4km |
| Harlow Mill Station | 3.2km |
| Roydon Station | 4.5km |
Broadband
Broadband access in CM20 3SY (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 CM20 3SY (2019 data)
Download
| Median download speed | 54.2Mbps |
| Average download speed | 85.0Mbps |
| Maximum download speed | 200.00Mbps |
Upload
| Median upload speed | 3.6Mbps |
| Average upload speed | 5.6Mbps |
| Maximum upload speed | 13.90Mbps |
Broadband limitations in CM20 3SY (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% |
CM20 3SY gas and electricity consumption
Estimated total energy consumption in CM20 3SY by fuel type, 2015.
Gas
| Consumption (kWh) | 526,614 |
|---|---|
| Meter count | 44 |
| Mean (kWh/meter) | 11,968 |
| Median (kWh/meter) | 11,814 |
Electricity
| Consumption (kWh) | 162,539 |
|---|---|
| Meter count | 44 |
| Mean (kWh/meter) | 3,694 |
| Median (kWh/meter) | 3,621 |
- Consumption: The estimated total energy consumption, in kWh, across all meters in CM20 3SY, for 2015.
- Meter count: The total number of meters in CM20 3SY.
- 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
66.7% of English postcodes are less deprived than CM20 3SY:Food Standards Agency
Three nearest food hygiene ratings to CM20 3SY (metres)
➜ Get more ratings from the Food Standards Agency
Nearest post box to CM20 3SY
| Last Collection | |||
|---|---|---|---|
| Location | Mon-Fri | Sat | Distance |
| Tanys Dell | 17:15 | 12:00 | 1,054m |
| River Mill | 17:15 | 12:00 | 1,176m |
| Pittmans Field | 17:45 | 12:00 | 1,181m |
CM20 3SY ITL and CM20 3SY 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 CM20 3SY:
| ITL 1 Code | Name |
|---|---|
| TLH | East |
| ITL 2 Code | Name |
| TLH3 | Essex |
| ITL 3 Code | Name |
| TLH35 | West Essex |
| LAU 1 Code | Name |
| E07000073 | Harlow |
CM20 3SY 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 CM20 3SY:
| Code | Name | |
|---|---|---|
| OA | E00110997 | |
| LSOA | E01021849 | Harlow 003A |
| MSOA | E02004546 | Harlow 003 |
Nearest postcodes to CM20 3SY
| CM20 3SZ | Greenhills | 116m |
| CM20 3SX | Greenhills | 119m |
| CM20 3PY | Broadfield | 191m |
| CM20 3RE | The Downs | 218m |
| CM20 3PU | Broadfield | 271m |
| CM20 3PS | Broadfield | 275m |
| CM20 3PX | Broadfield | 275m |
| CM20 3RG | The Downs | 279m |
| CM20 3RD | The Downs | 284m |
| CM20 3PR | Broadfield | 295m |
- 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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