CM20 postcode
Broadband in CM20 1JA
Harlow, Harlow
Superfast broadband covers 44.4% of premises here.
Free, independent comparison · Ofcom verified data · Updated 20 March 2026
Flood Risk
Medium
Fibre (FTTP)
No
Best speed
~30 Mbps
Speed Calculator
Adjust the options below to see how much broadband speed your household needs.
HD uses ~5 Mbps per person. 4K uses ~25 Mbps.
Each person on calls needs around 10 Mbps.
Competitive gaming needs low latency as much as raw speed.
Cameras, thermostats, speakers and similar devices each use a few Mbps.
The best available speed at CM20 1JA is ~30 Mbps. That covers your 14 Mbps estimate.
Speed Test
Check your current download speed and see how it compares to what is available at CM20 1JA.
The test downloads a 2 MB file from our server and measures how long it takes.
This test measures download speed only. Results vary depending on network conditions.
Broadband availability
Source: Ofcom Connected Nations 2025 (Jul 2025)
| Technology | Available | Coverage | Typical Speed |
|---|---|---|---|
| Standard (ADSL) | 44% | 44% | 10-20 Mbps |
| Superfast (30+ Mbps) | 44% | 44% | 30-80 Mbps |
| Ultrafast (100+ Mbps) | 0% | 0% | 100-300 Mbps |
| Full Fibre (FTTP) | N/A | N/A | 300-900 Mbps |
| Gigabit | 0% | 0% | 900-1,000 Mbps |
Speed Distribution at CM20 1JA
Source: Ofcom Connected Nations 2025
Mobile coverage
4G & 5G coverage · Ofcom Connected Nations 2025
4G Outdoor
4G Indoor
5G Outdoor
Networks with 4G
Schools nearby
Nearest schools within 5 miles · Ofsted ratings as at Jan 2026
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Flood risk
🟠
Flood risk: Medium
This postcode is in undefined — medium risk of flooding from rivers and sea.
Flood Zone
Risk Level
Medium
Air quality
Particulate matter & nitrogen dioxide levels
air quality
Air quality data not available.
WHO guideline: 15 μg/m³
WHO guideline: 45 μg/m³
WHO guideline: 25 μg/m³
Transport links
Nearest train stations and towns
Nearest train stations
No train stations found within 15 miles
Council tax bands
Band distribution for Harlow
Most common: Band
Annual council tax estimates for , 2024/25
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This is the area guide for CM20 1JA, located in Harlow. It covers connectivity, property, safety, and local services. Every claim links back to a specific data point. Read on for the detail.
44.4% of premises at CM20 1JA can access superfast broadband. The UK average is 93%. There is room for improvement here.
Here is how broadband speeds break down across premises at CM20 1JA. 55.6% of connections fall in the 10 to 30 Mbps range. 44.4% of connections fall in the 30 to 300 Mbps range. No premises here are stuck below 5 Mbps. Every property meets the basic threshold for video calls.
Translating the numbers at CM20 1JA into daily use gives a clearer picture. Superfast coverage is limited here. Streaming HD video should work on one device. Multiple simultaneous streams may struggle during peak hours.
FWA broadband has not reached CM20 1JA yet. Satellite services like Starlink or 4G home broadband routers can fill the gap where fixed-line options are limited.
0% of premises at CM20 1JA fall below the Universal Service Obligation of 10 Mbps. Every property here meets the minimum standard. That is not the case everywhere. Next-generation access (NGA) reaches 44.4% of the area. NGA typically means speeds of 24 Mbps or above.
Flood risk at CM20 1JA is rated Medium. Check Environment Agency flood maps for detailed information. Specialist flood insurance may be needed.
The three most common bands are D (25%), C (20%), E (20%). Band D corresponds to 1991 property values of £68,001 to £88,000. Current values are typically much higher. The spread across mid-range bands suggests a varied housing stock.
4G outdoor coverage at CM20 1JA reaches 95%. Indoor 4G drops to 85%. Some signal loss indoors is normal. Most calls and data should still work inside. Coverage data covers EE, O2, Three, Vodafone. Check each operator individually, as coverage varies by network. Strong 4G coverage combined with limited fixed broadband means 4G home broadband could be a practical alternative here.
Suitability scores for CM20 1JA: remote working 35/100, family 50/100, value 50/100. Remote workers may want to verify actual speeds before committing.
The local authority for CM20 1JA is Harlow. The CM20 postcode area contains 551 postcodes on this site. Superfast broadband across CM20 ranges from 0% to 100%. CM20 1JA is below the area average of 89%.
How does CM20 1JA compare to its neighbours? CM20 1JD (0.02 miles, harlow-unparished-area) has 100% superfast coverage and 0% gigabit. CM20 1JF (0.02 miles, harlow-unparished-area) has 45.5% superfast coverage and 0% gigabit. CM20 1JH (0.04 miles, harlow-unparished-area) has 88.9% superfast coverage and 0% gigabit. CM20 1EY (0.04 miles, harlow-unparished-area) has 42.9% superfast coverage and 0% gigabit. Neighbouring postcodes tend to have better superfast coverage.
Broadband availability varies by provider and by property. At CM20 1JA, check individual coverage tools from BT, Sky, Virgin Media, and local operators. If fibre is unavailable, consider 4G home broadband or satellite as alternatives. Speeds may still be adequate for most uses. Compare contract lengths, total costs over the term, and exit fees. The cheapest monthly rate is not always the best deal.
Harlow offers a mix of residential properties and local amenities. The character of any area is best judged in person.
Looking at the overall picture for CM20 1JA, a few things are worth highlighting. Harlow as a local authority area has its own planning priorities, council services, and infrastructure investment plans. Check the council website for the latest. The data covers what can be measured. Harlow has its own character that numbers alone cannot capture. Use these figures as a filter, then visit to get the full picture.
Data sources include Ofcom (broadband and mobile), Land Registry (house prices), Police.uk (crime), Ofsted (schools), Environment Agency (flood risk), and Open-Meteo (air quality). Council tax data comes from the Valuation Office Agency. EPC data is from DLUHC. Transport data uses NaPTAN. Speed distribution figures are from Ofcom Connected Nations. All figures are the latest available at the time of writing.
Before making a decision about CM20 1JA, visit in person. Check the commute at rush hour. Try the mobile signal indoors. Look at local shops and green spaces. Ask about broadband reliability, not just speed. Data sets the scene, but real life fills in the gaps.
That is the full data picture for CM20 1JA in Harlow. Use it alongside your own research. For the most current broadband speeds, run a live speed test from this page. Check back periodically as data is refreshed with new releases.
More local data is being added for this postcode
This page already has postcode-specific content, and more data-backed sections will appear as the remaining local datasets finish processing.
Frequently asked questions about CM20 1JA
What are the broadband speeds available at CM20 1JA?
Superfast broadband (30 Mbps+) is available to 44.4% of premises at CM20 1JA.
What is the average house price near CM20 1JA?
No recent house price data is available for CM20 1JA.
What is the flood risk for properties at CM20 1JA?
CM20 1JA has a Medium flood risk rating. Check Environment Agency maps for detail.
What schools are nearby in the CM20 1JA area?
School data for CM20 1JA is being updated. Check the Get Information About Schools service for the latest.
How does crime rate in CM20 1JA compare to other areas?
Crime data for this area is being updated.
How suitable is CM20 1JA for remote working?
CM20 1JA scores 35/100 for remote working suitability. Speeds may limit video-heavy workflows.
What is the mobile signal like at CM20 1JA?
4G outdoor coverage at CM20 1JA is 95%. Indoor coverage may be lower.
What is the most common energy efficiency rating near CM20 1JA?
EPC data for CM20 1JA is being updated. Check the EPC register for individual property ratings.
What is the council tax band distribution at CM20 1JA?
Council tax band information for CM20 1JA is being updated.
How accessible are GP surgeries near CM20 1JA?
GP surgery data for CM20 1JA is being updated. Check NHS.uk for the latest.
What transport links are available near CM20 1JA?
Transport data for CM20 1JA is being updated.
Is CM20 1JA a suitable area for families?
CM20 1JA scores 50/100 for family suitability. Check school and crime sections above for detail.
What is the air quality like at CM20 1JA?
Air quality data for CM20 1JA is being updated.
How far is the nearest EV charging point from CM20 1JA?
EV charging data for CM20 1JA is being updated. Check Zap-Map for the latest.
Can I get full fibre broadband at CM20 1JA?
Full fibre availability at CM20 1JA is being updated. Check Openreach for the latest rollout status.
Area suitability scores
CM20 1JARemote Worker
35Based on superfast broadband coverage, FTTP %, and 4G mobile outdoor coverage.
Family
50Based on Ofsted school ratings, crime rate, flood risk, and GP surgery proximity.
Value for Money
50Based on broadband quality relative to average house price in the area.
Map
Area info
Parish
Harlow
District
Harlow
Region
Constituency
LSOA
E01034366
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