SG12 postcode
Broadband in SG12 9SE
Great Amwell, East Hertfordshire
Superfast broadband covers 80% of premises here.
Free, independent comparison · Ofcom verified data · Updated 17 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 SG12 9SE 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 SG12 9SE.
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) | 80% | 80% | 10-20 Mbps |
| Superfast (30+ Mbps) | 80% | 80% | 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 SG12 9SE
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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Looking at SG12 9SE in Great Amwell? Here is what the data says. From broadband coverage to crime rates, this is the full picture. All numbers are from official sources. The guide is updated as new data becomes available.
80% of premises at SG12 9SE can access superfast broadband. The UK average is 93%. There is room for improvement here.
Looking at the full speed profile for SG12 9SE gives a better picture of what to expect. 20% of connections fall in the 10 to 30 Mbps range. 80% 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.
What do the broadband speeds at SG12 9SE mean in practice? Most premises have superfast speeds. Remote working with video calls and cloud tools should be manageable for most households.
FWA broadband has not reached SG12 9SE yet. Satellite services like Starlink or 4G home broadband routers can fill the gap where fixed-line options are limited.
The USO guarantees every UK home at least 10 Mbps. At SG12 9SE, 0% of properties do not meet this threshold. 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 SG12 9SE 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 SG12 9SE 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 SG12 9SE: remote working 50/100, family 50/100, value 50/100. Remote workers may want to verify actual speeds before committing.
The local authority for SG12 9SE is East Hertfordshire. The immediate area is Great Amwell, a distinct community within the wider district. The SG12 postcode area contains 908 postcodes on this site. Superfast broadband across SG12 ranges from 0% to 100%. SG12 9SE is below the area average of 94%.
How does SG12 9SE compare to its neighbours? SG12 9SF (0.01 miles, great-amwell) has 33.3% superfast coverage and 0% gigabit. SG12 9SJ (0.06 miles, great-amwell) has 0% superfast coverage and 0% gigabit. SG12 9SG (0.06 miles, great-amwell) has 0% superfast coverage and 0% gigabit. SG12 9SE has better superfast coverage than its immediate neighbours.
Broadband availability varies by provider and by property. At SG12 9SE, 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.
Great Amwell offers a mix of residential properties and local amenities. The character of any area is best judged in person.
Pulling the data together for SG12 9SE, here is what stands out. 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. Great Amwell 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 SG12 9SE, 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 SG12 9SE in Great Amwell. 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 SG12 9SE
What are the broadband speeds available at SG12 9SE?
Superfast broadband (30 Mbps+) is available to 80% of premises at SG12 9SE.
What is the average house price near SG12 9SE?
No recent house price data is available for SG12 9SE.
What is the flood risk for properties at SG12 9SE?
SG12 9SE has a High flood risk rating. Check Environment Agency maps for detail.
What schools are nearby in the SG12 9SE area?
School data for SG12 9SE is being updated. Check the Get Information About Schools service for the latest.
How does crime rate in SG12 9SE compare to other areas?
Crime data for this area is being updated.
How suitable is SG12 9SE for remote working?
SG12 9SE scores 50/100 for remote working suitability. Speeds may limit video-heavy workflows.
What is the mobile signal like at SG12 9SE?
4G outdoor coverage at SG12 9SE is 95%. Indoor coverage may be lower.
What is the most common energy efficiency rating near SG12 9SE?
EPC data for SG12 9SE is being updated. Check the EPC register for individual property ratings.
What is the council tax band distribution at SG12 9SE?
Council tax band information for SG12 9SE is being updated.
How accessible are GP surgeries near SG12 9SE?
GP surgery data for SG12 9SE is being updated. Check NHS.uk for the latest.
What transport links are available near SG12 9SE?
Transport data for SG12 9SE is being updated.
Is SG12 9SE a suitable area for families?
SG12 9SE scores 50/100 for family suitability. Check school and crime sections above for detail.
What is the air quality like at SG12 9SE?
Air quality data for SG12 9SE is being updated.
How far is the nearest EV charging point from SG12 9SE?
EV charging data for SG12 9SE is being updated. Check Zap-Map for the latest.
Can I get full fibre broadband at SG12 9SE?
Full fibre availability at SG12 9SE is being updated. Check Openreach for the latest rollout status.
Area suitability scores
SG12 9SERemote Worker
50Based 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
Great Amwell
District
East Hertfordshire
Region
Constituency
LSOA
E01023468
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