CM1 postcode
Broadband in CM1 4NJ
Roxwell, Chelmsford
Gigabit broadband is available at this postcode.
Free, independent comparison · Ofcom verified data · Updated 21 March 2026
Flood Risk
Medium
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 CM1 4NJ. 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 CM1 4NJ.
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) | 13% | 13% | 10-20 Mbps |
| Superfast (30+ Mbps) | 13% | 13% | 30-80 Mbps |
| Ultrafast (100+ Mbps) | 13% | 13% | 100-300 Mbps |
| Full Fibre (FTTP) | 0% | 0% | 300-900 Mbps |
| Gigabit | 13% | 13% | 900-1,000 Mbps |
Speed Distribution at CM1 4NJ
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 Chelmsford
Most common: Band
Annual council tax estimates for , 2024/25
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Check Deals →Living near CM1 4NJ
Roxwell is home to CM1 4NJ. Whether you live here or plan to move, the data below paints a clear picture. Broadband, schools, crime, house prices, and local services all follow. The numbers speak for themselves.
Superfast coverage here stands at 12.5%. Nationally, 93% of UK premises have access. Some properties may struggle with speed. Ultrafast broadband (100 Mbps+) reaches 12.5% of properties. Fewer than half of homes here can get ultrafast speeds. Gigabit-capable connections cover 12.5% of premises. Gigabit is available but not yet widespread at this postcode.
Looking at the full speed profile for CM1 4NJ gives a better picture of what to expect. 87.5% of connections fall in the 5 to 10 Mbps range. 12.5% 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.
Translating the numbers at CM1 4NJ 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. Limited superfast coverage means remote workers should test their connection carefully. Video calls may drop or pixelate. A mobile hotspot can serve as a backup.
25% of properties at CM1 4NJ can get Fixed Wireless Access broadband. This can be a useful alternative where fibre rollout is incomplete. FWA is an option for some properties. Check individual provider coverage before committing.
50% of premises at CM1 4NJ fall below the Universal Service Obligation of 10 Mbps. Properties below the USO can request a connection from BT under the scheme. Next-generation access (NGA) reaches 25% of the area. NGA typically means speeds of 24 Mbps or above.
Flood risk at CM1 4NJ 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.
Outdoor 4G mobile signal at CM1 4NJ 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 CM1 4NJ: remote working 35/100, family 50/100, value 50/100. Remote workers may want to verify actual speeds before committing.
The local authority for CM1 4NJ is Chelmsford. The immediate area is Roxwell, a distinct community within the wider district. The CM1 postcode area contains 1440 postcodes on this site. Superfast broadband across CM1 ranges from 0% to 100%. CM1 4NJ is below the area average of 97%.
Broadband availability varies by provider and by property. At CM1 4NJ, 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.
Life in Roxwell depends on what matters to you. Broadband, transport, and local services vary by street.
Looking at the overall picture for CM1 4NJ, a few things are worth highlighting. Chelmsford 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. Roxwell 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 CM1 4NJ, 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 CM1 4NJ in Roxwell. 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 CM1 4NJ
What are the broadband speeds available at CM1 4NJ?
Superfast broadband (30 Mbps+) is available to 12.5% of premises at CM1 4NJ. Ultrafast coverage is at 12.5%.
What is the average house price near CM1 4NJ?
No recent house price data is available for CM1 4NJ.
What is the flood risk for properties at CM1 4NJ?
CM1 4NJ has a Medium flood risk rating. Check Environment Agency maps for detail.
What schools are nearby in the CM1 4NJ area?
School data for CM1 4NJ is being updated. Check the Get Information About Schools service for the latest.
How does crime rate in CM1 4NJ compare to other areas?
Crime data for this area is being updated.
How suitable is CM1 4NJ for remote working?
CM1 4NJ scores 35/100 for remote working suitability. Speeds may limit video-heavy workflows.
What is the mobile signal like at CM1 4NJ?
4G outdoor coverage at CM1 4NJ is 95%. Indoor coverage may be lower.
What is the most common energy efficiency rating near CM1 4NJ?
EPC data for CM1 4NJ is being updated. Check the EPC register for individual property ratings.
What is the council tax band distribution at CM1 4NJ?
Council tax band information for CM1 4NJ is being updated.
How accessible are GP surgeries near CM1 4NJ?
GP surgery data for CM1 4NJ is being updated. Check NHS.uk for the latest.
What transport links are available near CM1 4NJ?
Transport data for CM1 4NJ is being updated.
Is CM1 4NJ a suitable area for families?
CM1 4NJ scores 50/100 for family suitability. Check school and crime sections above for detail.
What is the air quality like at CM1 4NJ?
Air quality data for CM1 4NJ is being updated.
How far is the nearest EV charging point from CM1 4NJ?
EV charging data for CM1 4NJ is being updated. Check Zap-Map for the latest.
Can I get full fibre broadband at CM1 4NJ?
Ultrafast broadband (100 Mbps+) reaches 12.5% of premises. Check Openreach and local operators for FTTP availability.
Area suitability scores
CM1 4NJRemote 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
Roxwell
District
Chelmsford
Region
Constituency
LSOA
E01021550
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