CM21 postcode
Broadband in CM21 0BE
Sawbridgeworth, East Hertfordshire
Superfast broadband covers 70% of premises here.
Free, independent comparison · Ofcom verified data · Updated 23 March 2026
Flood Risk
High
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 CM21 0BE 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 CM21 0BE.
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) | 70% | 70% | 10-20 Mbps |
| Superfast (30+ Mbps) | 70% | 70% | 30-80 Mbps |
| Ultrafast (100+ Mbps) | 0% | 0% | 100-300 Mbps |
| Full Fibre (FTTP) | 0% | 0% | 300-900 Mbps |
| Gigabit | 0% | 0% | 900-1,000 Mbps |
Speed Distribution at CM21 0BE
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: High
This postcode is in undefined — high risk of flooding from rivers and sea.
Flood Zone
Risk Level
High
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 East Hertfordshire
Most common: Band
Annual council tax estimates for , 2024/25
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Check Deals →Living near CM21 0BE
Sawbridgeworth is home to CM21 0BE. 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 70%. Nationally, 93% of UK premises have access. Some properties may struggle with speed.
Looking at the full speed profile for CM21 0BE gives a better picture of what to expect. 30% of connections fall in the 10 to 30 Mbps range. 70% 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.
Here is how the broadband at CM21 0BE maps against common household needs.
Fixed Wireless Access is not currently available at CM21 0BE. For properties without fibre, 4G or 5G home broadband from Three, EE, or Vodafone may be an alternative.
0% of premises at CM21 0BE 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 CM21 0BE is rated High. 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 CM21 0BE 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 CM21 0BE: remote working 35/100, family 50/100, value 50/100. Remote workers may want to verify actual speeds before committing.
CM21 0BE falls within the East Hertfordshire local authority area. The immediate area is Sawbridgeworth, a distinct community within the wider district. The CM21 postcode area contains 310 postcodes on this site. Superfast broadband across CM21 ranges from 0% to 100%. CM21 0BE is below the area average of 94%.
How does CM21 0BE compare to its neighbours? CM21 0AN (0.05 miles, sawbridgeworth) has 100% superfast coverage and 100% gigabit. CM21 0AQ (0.06 miles, sawbridgeworth) has 100% superfast coverage and 0% gigabit. Neighbouring postcodes tend to have better superfast coverage.
Broadband availability varies by provider and by property. At CM21 0BE, 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.
Sawbridgeworth 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 CM21 0BE, a few things are worth highlighting. East Hertfordshire 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. Sawbridgeworth 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 CM21 0BE. 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.
This covers the key data for CM21 0BE. Broadband, property, schools, safety, and local services all in one place. For area-wide trends, see the Sawbridgeworth hub page. Bookmark this page and check back as new data arrives.
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 CM21 0BE
What are the broadband speeds available at CM21 0BE?
Superfast broadband (30 Mbps+) is available to 70% of premises at CM21 0BE.
What is the average house price near CM21 0BE?
No recent house price data is available for CM21 0BE.
What is the flood risk for properties at CM21 0BE?
CM21 0BE has a High flood risk rating. Check Environment Agency maps for detail.
What schools are nearby in the CM21 0BE area?
School data for CM21 0BE is being updated. Check the Get Information About Schools service for the latest.
How does crime rate in CM21 0BE compare to other areas?
Crime data for this area is being updated.
How suitable is CM21 0BE for remote working?
CM21 0BE scores 35/100 for remote working suitability. Speeds may limit video-heavy workflows.
What is the mobile signal like at CM21 0BE?
4G outdoor coverage at CM21 0BE is 95%. Indoor coverage may be lower.
What is the most common energy efficiency rating near CM21 0BE?
EPC data for CM21 0BE is being updated. Check the EPC register for individual property ratings.
What is the council tax band distribution at CM21 0BE?
Council tax band information for CM21 0BE is being updated.
How accessible are GP surgeries near CM21 0BE?
GP surgery data for CM21 0BE is being updated. Check NHS.uk for the latest.
What transport links are available near CM21 0BE?
Transport data for CM21 0BE is being updated.
Is CM21 0BE a suitable area for families?
CM21 0BE scores 50/100 for family suitability. Check school and crime sections above for detail.
What is the air quality like at CM21 0BE?
Air quality data for CM21 0BE is being updated.
How far is the nearest EV charging point from CM21 0BE?
EV charging data for CM21 0BE is being updated. Check Zap-Map for the latest.
Can I get full fibre broadband at CM21 0BE?
Full fibre availability at CM21 0BE is being updated. Check Openreach for the latest rollout status.
Area suitability scores
CM21 0BERemote 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
Sawbridgeworth
District
East Hertfordshire
Region
Constituency
LSOA
E01023500
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