SN3 postcode
Broadband in SN3 4YF
South Marston, Swindon
Gigabit broadband is available at this postcode.
Free, independent comparison · Ofcom verified data · Updated 5 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 SN3 4YF. 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 SN3 4YF.
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) | 67% | 67% | 10-20 Mbps |
| Superfast (30+ Mbps) | 67% | 67% | 30-80 Mbps |
| Ultrafast (100+ Mbps) | 67% | 67% | 100-300 Mbps |
| Full Fibre (FTTP) | N/A | N/A | 300-900 Mbps |
| Gigabit | 67% | 67% | 900-1,000 Mbps |
Speed Distribution at SN3 4YF
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 Swindon
Most common: Band
Annual council tax estimates for , 2024/25
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Check Deals →Living near SN3 4YF
This is the area guide for SN3 4YF, located in South Marston (Swindon). It covers connectivity, property, safety, and local services. Every claim links back to a specific data point. Read on for the detail.
Superfast coverage here stands at 66.7%. Nationally, 93% of UK premises have access. Some properties may struggle with speed. Ultrafast broadband (100 Mbps+) reaches 66.7% of properties. Over half of premises have access to faster tiers. Gigabit-capable connections cover 66.7% of premises. Gigabit is available but not yet widespread at this postcode.
Here is how broadband speeds break down across premises at SN3 4YF. 33.3% of connections fall in the 2 to 5 Mbps range. 66.7% of connections fall in the 300 Mbps or faster range. 33% of premises get less than 5 Mbps. That is not enough for reliable video calls or streaming. Over half of connections exceed 300 Mbps. That supports multiple 4K streams, large file transfers, and cloud gaming without issue.
What do the broadband speeds at SN3 4YF mean in practice?
FWA broadband has not reached SN3 4YF 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 SN3 4YF, 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 66.7% of the area. NGA typically means speeds of 24 Mbps or above.
Flood risk at SN3 4YF 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 SN3 4YF 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 SN3 4YF: remote working 35/100, family 50/100, value 50/100. Remote workers may want to verify actual speeds before committing.
The local authority for SN3 4YF is Swindon. The immediate area is South Marston, a distinct community within the wider district. The SN3 postcode area contains 1244 postcodes on this site. Superfast broadband across SN3 ranges from 0% to 100%. SN3 4YF is below the area average of 98%.
How does SN3 4YF compare to its neighbours? SN3 4UQ (0.05 miles, south-marston) has 100% superfast coverage and 100% gigabit. Neighbouring postcodes tend to have better superfast coverage.
When choosing a broadband provider at SN3 4YF, 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.
Every part of South Marston 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 SN3 4YF? Swindon 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. South Marston 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 SN3 4YF, 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 SN3 4YF in South Marston. 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 SN3 4YF
What are the broadband speeds available at SN3 4YF?
Superfast broadband (30 Mbps+) is available to 66.7% of premises at SN3 4YF. Ultrafast coverage is at 66.7%.
What is the average house price near SN3 4YF?
No recent house price data is available for SN3 4YF.
What is the flood risk for properties at SN3 4YF?
SN3 4YF has a Medium flood risk rating. Check Environment Agency maps for detail.
What schools are nearby in the SN3 4YF area?
School data for SN3 4YF is being updated. Check the Get Information About Schools service for the latest.
How does crime rate in SN3 4YF compare to other areas?
Crime data for this area is being updated.
How suitable is SN3 4YF for remote working?
SN3 4YF scores 35/100 for remote working suitability. Speeds may limit video-heavy workflows.
What is the mobile signal like at SN3 4YF?
4G outdoor coverage at SN3 4YF is 95%. Indoor coverage may be lower.
What is the most common energy efficiency rating near SN3 4YF?
EPC data for SN3 4YF is being updated. Check the EPC register for individual property ratings.
What is the council tax band distribution at SN3 4YF?
Council tax band information for SN3 4YF is being updated.
How accessible are GP surgeries near SN3 4YF?
GP surgery data for SN3 4YF is being updated. Check NHS.uk for the latest.
What transport links are available near SN3 4YF?
Transport data for SN3 4YF is being updated.
Is SN3 4YF a suitable area for families?
SN3 4YF scores 50/100 for family suitability. Check school and crime sections above for detail.
What is the air quality like at SN3 4YF?
Air quality data for SN3 4YF is being updated.
How far is the nearest EV charging point from SN3 4YF?
EV charging data for SN3 4YF is being updated. Check Zap-Map for the latest.
Can I get full fibre broadband at SN3 4YF?
Ultrafast broadband (100 Mbps+) reaches 66.7% of premises. Check Openreach and local operators for FTTP availability.
Area suitability scores
SN3 4YFRemote 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
South Marston
District
Swindon
Region
Constituency
LSOA
E01015473
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