CB11 postcode
Broadband in CB11 4LZ
Elmdon, Uttlesford
Superfast broadband covers 100% of premises here.
Free, independent comparison · Ofcom verified data · Updated 2 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 CB11 4LZ is ~30 Mbps. That covers your 14 Mbps estimate.
Speed Test
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Broadband availability
Source: Ofcom Connected Nations 2025 (Jul 2025)
| Technology | Available | Coverage | Typical Speed |
|---|---|---|---|
| Standard (ADSL) | 100% | 100% | 10-20 Mbps |
| Superfast (30+ Mbps) | 100% | 100% | 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 CB11 4LZ
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 Uttlesford
Most common: Band
Annual council tax estimates for , 2024/25
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Check Deals →Living near CB11 4LZ
This is the area guide for CB11 4LZ, located in Elmdon (Uttlesford). It covers connectivity, property, safety, and local services. Every claim links back to a specific data point. Read on for the detail.
100% of premises at CB11 4LZ can access superfast broadband. The UK average is 93%. This postcode meets or exceeds that benchmark.
The speed distribution at CB11 4LZ tells a more detailed story than headline figures alone. 100% 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 CB11 4LZ into daily use gives a clearer picture. Most premises have superfast speeds. Remote working with video calls and cloud tools should be manageable for most households.
Fixed Wireless Access is not currently available at CB11 4LZ. For properties without fibre, 4G or 5G home broadband from Three, EE, or Vodafone may be an alternative.
0% of premises at CB11 4LZ 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 CB11 4LZ 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 CB11 4LZ 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.
Suitability scores for CB11 4LZ: remote working 55/100, family 50/100, value 50/100. Remote workers may want to verify actual speeds before committing.
CB11 4LZ falls within the Uttlesford local authority area. The immediate area is Elmdon, a distinct community within the wider district. The CB11 postcode area contains 514 postcodes on this site. Superfast broadband across CB11 ranges from 0% to 100%. CB11 4LZ is above the area average of 93%.
How does CB11 4LZ compare to its neighbours? CB11 4NP (0.03 miles, elmdon) has 100% superfast coverage and 0% gigabit. Coverage is broadly similar across these neighbouring postcodes.
When choosing a broadband provider at CB11 4LZ, check what technology reaches your specific address. Availability varies by street and sometimes by building. 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.
Elmdon offers a mix of residential properties and local amenities. The character of any area is best judged in person.
What does all of this mean for someone considering CB11 4LZ? Connectivity at CB11 4LZ is a strength. Strong broadband coverage gives flexibility for both working and leisure. The area scores well on that front. Uttlesford 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. Elmdon 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 CB11 4LZ. 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.
That is the full data picture for CB11 4LZ in Elmdon. 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 CB11 4LZ
What are the broadband speeds available at CB11 4LZ?
Superfast broadband (30 Mbps+) is available to 100% of premises at CB11 4LZ.
What is the average house price near CB11 4LZ?
No recent house price data is available for CB11 4LZ.
What is the flood risk for properties at CB11 4LZ?
CB11 4LZ has a Medium flood risk rating. Check Environment Agency maps for detail.
What schools are nearby in the CB11 4LZ area?
School data for CB11 4LZ is being updated. Check the Get Information About Schools service for the latest.
How does crime rate in CB11 4LZ compare to other areas?
Crime data for this area is being updated.
How suitable is CB11 4LZ for remote working?
CB11 4LZ scores 55/100 for remote working suitability. Speeds may limit video-heavy workflows.
What is the mobile signal like at CB11 4LZ?
4G outdoor coverage at CB11 4LZ is 95%. Indoor coverage may be lower.
What is the most common energy efficiency rating near CB11 4LZ?
EPC data for CB11 4LZ is being updated. Check the EPC register for individual property ratings.
What is the council tax band distribution at CB11 4LZ?
Council tax band information for CB11 4LZ is being updated.
How accessible are GP surgeries near CB11 4LZ?
GP surgery data for CB11 4LZ is being updated. Check NHS.uk for the latest.
What transport links are available near CB11 4LZ?
Transport data for CB11 4LZ is being updated.
Is CB11 4LZ a suitable area for families?
CB11 4LZ scores 50/100 for family suitability. Check school and crime sections above for detail.
What is the air quality like at CB11 4LZ?
Air quality data for CB11 4LZ is being updated.
How far is the nearest EV charging point from CB11 4LZ?
EV charging data for CB11 4LZ is being updated. Check Zap-Map for the latest.
Can I get full fibre broadband at CB11 4LZ?
Full fibre availability at CB11 4LZ is being updated. Check Openreach for the latest rollout status.
Area suitability scores
CB11 4LZRemote Worker
55Based 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.
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Area info
Parish
Elmdon
District
Uttlesford
Region
Constituency
LSOA
E01022098
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