CM20 3SX maps, stats, and open data
CM20 3SX lies on Greenhills in Harlow. CM20 3SX 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 3SX 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 3SX geodata
| Easting | 545184 |
| Northing | 209838 |
| Latitude | 51.768399 |
| Longitude | 0.102633 |
Where is CM20 3SX?
| Street | Greenhills |
| Town/City | Harlow |
| Country | England |
| Postcode District | CM20 |
CM20 3SX Elevation
Elevation or altitude of CM20 3SX as distance above sea level:
| Metres | Feet | |
|---|---|---|
| Elevation | 60m | 197ft |
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 3SX
| Leisure Centre (Second Avenue) | Harlow | 214m |
| Garden Tiger (Maddox Road) | Harlow | 269m |
| Fenner Brockway House (Maddox Road) | Harlow | 270m |
| Fenner Brockway House (Maddox Road) | Harlow | 271m |
| Garden Tiger (Maddox Road) | Harlow | 273m |
Nearest railway stations to CM20 3SX
| Harlow Town Station | 1.5km |
| Harlow Mill Station | 3.2km |
| Roydon Station | 4.6km |
Broadband
Broadband access in CM20 3SX (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 3SX (2019 data)
Download
| Median download speed | 47.8Mbps |
| Average download speed | 67.9Mbps |
| Maximum download speed | 200.00Mbps |
Upload
| Median upload speed | 4.0Mbps |
| Average upload speed | 6.0Mbps |
| Maximum upload speed | 19.53Mbps |
Broadband limitations in CM20 3SX (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 3SX gas and electricity consumption
Estimated total energy consumption in CM20 3SX by fuel type, 2015.
Gas
| Consumption (kWh) | 389,450 |
|---|---|
| Meter count | 38 |
| Mean (kWh/meter) | 10,249 |
| Median (kWh/meter) | 10,107 |
Electricity
| Consumption (kWh) | 110,194 |
|---|---|
| Meter count | 38 |
| Mean (kWh/meter) | 2,900 |
| Median (kWh/meter) | 2,601 |
- Consumption: The estimated total energy consumption, in kWh, across all meters in CM20 3SX, for 2015.
- Meter count: The total number of meters in CM20 3SX.
- 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 3SX:Food Standards Agency
Three nearest food hygiene ratings to CM20 3SX (metres)
➜ Get more ratings from the Food Standards Agency
Nearest post box to CM20 3SX
| Last Collection | |||
|---|---|---|---|
| Location | Mon-Fri | Sat | Distance |
| Pittmans Field | 17:45 | 12:00 | 1,153m |
| Tanys Dell | 17:15 | 12:00 | 1,173m |
| River Mill | 17:15 | 12:00 | 1,282m |
CM20 3SX ITL and CM20 3SX 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 3SX:
| 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 3SX 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 3SX:
| Code | Name | |
|---|---|---|
| OA | E00111002 | |
| LSOA | E01021849 | Harlow 003A |
| MSOA | E02004546 | Harlow 003 |
Nearest postcodes to CM20 3SX
| CM20 3SZ | Greenhills | 101m |
| CM20 3RE | The Downs | 102m |
| CM20 3SY | Greenhills | 119m |
| CM20 3RG | The Downs | 161m |
| CM20 3PY | Broadfield | 172m |
| CM20 3RD | The Downs | 193m |
| CM20 3PX | Broadfield | 221m |
| CM20 3RH | The Downs | 223m |
| CM20 3RF | The Downs | 242m |
| CM20 3RQ | The Downs | 242m |
- 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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