CM4 postcode
Broadband in CM4 0LJ
High Ongar, Epping Forest
Gigabit broadband is available at this postcode.
Free, independent comparison · Ofcom verified data · Updated 24 March 2026
Flood Risk
Low
Fibre (FTTP)
No
Best speed
Gigabit (1Gbps+)
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.
Gigabit broadband (Gigabit (1Gbps+)) is available at CM4 0LJ. That covers your 14 Mbps needs with room to spare.
Speed Test
Check your current download speed and see how it compares to what is available at CM4 0LJ.
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) | 75% | 75% | 10-20 Mbps |
| Superfast (30+ Mbps) | 75% | 75% | 30-80 Mbps |
| Ultrafast (100+ Mbps) | 75% | 75% | 100-300 Mbps |
| Full Fibre (FTTP) | N/A | N/A | 300-900 Mbps |
| Gigabit | 75% | 75% | 900-1,000 Mbps |
Speed Distribution at CM4 0LJ
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: Low
This postcode is in undefined — low risk of flooding from rivers and sea.
Flood Zone
Risk Level
Low
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 Epping Forest
Most common: Band
Annual council tax estimates for , 2024/25
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CM4 0LJ sits in High Ongar, part of Epping Forest. This guide covers broadband speeds, house prices, schools, and more. Every figure comes from verified public data sources. Use it alongside your own research when comparing areas.
Superfast coverage here stands at 75%. Nationally, 93% of UK premises have access. Some properties may struggle with speed. Ultrafast broadband (100 Mbps+) reaches 75% of properties. Over half of premises have access to faster tiers. Gigabit-capable connections cover 75% of premises. Gigabit is available but not yet widespread at this postcode.
Here is how broadband speeds break down across premises at CM4 0LJ. 25% of connections fall in the 10 to 30 Mbps range. 75% of connections fall in the 300 Mbps or faster range. No premises here are stuck below 5 Mbps. Every property meets the basic threshold for video calls. Over half of connections exceed 300 Mbps. That supports multiple 4K streams, large file transfers, and cloud gaming without issue.
Translating the numbers at CM4 0LJ into daily use gives a clearer picture.
FWA broadband has not reached CM4 0LJ yet. Satellite services like Starlink or 4G home broadband routers can fill the gap where fixed-line options are limited.
0% of premises at CM4 0LJ 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 100% of the area. NGA typically means speeds of 24 Mbps or above.
Flood risk at CM4 0LJ is rated Low. Minor precautions may be worth considering. Check with insurers about any loading on premiums.
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.
Outdoor 4G mobile signal at CM4 0LJ is available across 95% of the area. 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 CM4 0LJ: remote working 35/100, family 50/100, value 50/100. Remote workers may want to verify actual speeds before committing.
CM4 0LJ falls within the Epping Forest local authority area. The immediate area is High Ongar, a distinct community within the wider district. The CM4 postcode area contains 417 postcodes on this site. Superfast broadband across CM4 ranges from 0% to 100%. CM4 0LJ is below the area average of 91%.
How does CM4 0LJ compare to its neighbours? CM4 0LH (0.05 miles, high-ongar) has 100% superfast coverage and 100% gigabit. Neighbouring postcodes tend to have better superfast coverage.
Broadband availability varies by provider and by property. At CM4 0LJ, 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.
Every part of High Ongar has its own feel. This data gives you the factual starting point. A visit fills in the rest.
What does all of this mean for someone considering CM4 0LJ? Epping Forest 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. High Ongar 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.
Numbers tell part of the story for CM4 0LJ. Visit at different times of day. Talk to neighbours. Check mobile signal indoors. Walk the route to the nearest school or station. Test the broadband speed from inside the property. These things do not show up in data.
CM4 0LJ in High Ongar: broadband, house prices, crime, schools, and more. All from verified sources. Run a speed test above for a live reading. Compare with nearby postcodes to see how this area stacks up against its neighbours.
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 CM4 0LJ
What are the broadband speeds available at CM4 0LJ?
Superfast broadband (30 Mbps+) is available to 75% of premises at CM4 0LJ. Ultrafast coverage is at 75%.
What is the average house price near CM4 0LJ?
No recent house price data is available for CM4 0LJ.
What is the flood risk for properties at CM4 0LJ?
CM4 0LJ has a Low flood risk rating. Check Environment Agency maps for detail.
What schools are nearby in the CM4 0LJ area?
School data for CM4 0LJ is being updated. Check the Get Information About Schools service for the latest.
How does crime rate in CM4 0LJ compare to other areas?
Crime data for this area is being updated.
How suitable is CM4 0LJ for remote working?
CM4 0LJ scores 35/100 for remote working suitability. Speeds may limit video-heavy workflows.
What is the mobile signal like at CM4 0LJ?
4G outdoor coverage at CM4 0LJ is 95%. Indoor coverage may be lower.
What is the most common energy efficiency rating near CM4 0LJ?
EPC data for CM4 0LJ is being updated. Check the EPC register for individual property ratings.
What is the council tax band distribution at CM4 0LJ?
Council tax band information for CM4 0LJ is being updated.
How accessible are GP surgeries near CM4 0LJ?
GP surgery data for CM4 0LJ is being updated. Check NHS.uk for the latest.
What transport links are available near CM4 0LJ?
Transport data for CM4 0LJ is being updated.
Is CM4 0LJ a suitable area for families?
CM4 0LJ scores 50/100 for family suitability. Check school and crime sections above for detail.
What is the air quality like at CM4 0LJ?
Air quality data for CM4 0LJ is being updated.
How far is the nearest EV charging point from CM4 0LJ?
EV charging data for CM4 0LJ is being updated. Check Zap-Map for the latest.
Can I get full fibre broadband at CM4 0LJ?
Ultrafast broadband (100 Mbps+) reaches 75% of premises. Check Openreach and local operators for FTTP availability.
Area suitability scores
CM4 0LJRemote 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
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Area info
Parish
High Ongar
District
Epping Forest
Region
Constituency
LSOA
E01021769
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