SA1 postcode
Broadband in SA1 5SN
Castle, Swansea
Gigabit broadband is available at this postcode.
Free, independent comparison · Ofcom verified data
Flood Risk
Low
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 SA1 5SN. 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 SA1 5SN.
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) | 100% | 100% | 10-20 Mbps |
| Superfast (30+ Mbps) | 100% | 100% | 30-80 Mbps |
| Ultrafast (100+ Mbps) | 100% | 100% | 100-300 Mbps |
| Full Fibre (FTTP) | N/A | N/A | 300-900 Mbps |
| Gigabit | 100% | 100% | 900-1,000 Mbps |
Speed Distribution at SA1 5SN
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: Low
This postcode is in undefined — low risk of flooding from rivers and sea.
Flood Zone
Risk Level
Low
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 Swansea
Most common: Band
Annual council tax estimates for , 2024/25
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Considering Castle? SA1 5SN sits in the Swansea area. We've gathered broadband, property, crime, school, and environmental data for this exact postcode. Ookla speed tests, Land Registry prices, Ofcom coverage stats, Police.uk crime figures. All from verified government sources. No estimates, no guesswork. Just the numbers that matter when choosing where to live.
Broadband at SA1 5SN is solid. Superfast (30Mbps+) reaches 100% of premises. The UK average is around 93%. Castle beats that. Ultrafast (100Mbps+) covers 100%. That puts Castle ahead of most UK postcodes. Enough for streaming, video calls, and smart home devices. Gigabit connections: 100% coverage. Most homes here can get future-proof speeds.
Next-gen fibre infrastructure covers 100% of premises. Most of the area has modern fibre connections.
Limited house price data for SA1 5SN. Few residential sales on record here. Could be a commercial area, new development, or rental-heavy. Land Registry only records completed sales. Rentals and new-builds under shared ownership may not appear. Check Rightmove or Zoopla for current asking prices. Talk to local estate agents for a ground-level view.
No public EV chargers recorded nearby. Home charging would be the main option. Check Zap-Map for the latest charger locations.
A note on broadband providers. Ofcom data shows what's available. Not which provider to pick. Actual speeds depend on your line, your router, and your provider. Check BT, Sky, Virgin Media, and local FTTP operators. Compare deals at broadbandcompareuk.com or uSwitch. Contract lengths vary. 18 months is standard. Some offer 12. Ask about setup fees. They range from free to £50+. Run a speed test after installation. If speeds don't match what you're paying for, complain.
Where does this data come from? Broadband figures from Ofcom Connected Nations 2025. Crime from Police.uk. House prices from HM Land Registry. Demographics from the ONS Census. Flood data from the Environment Agency. Speed tests from Ookla. All public, all verifiable.
Numbers only go so far. Visit SA1 5SN on a weekday morning and a Saturday afternoon. Check parking availability. Listen for traffic noise. Look at the condition of nearby properties. Talk to a neighbour if you can. First impressions matter when choosing a home.
Those are the facts for SA1 5SN. Compare with other postcodes you're considering. Each section above links to its official source. The data is objective. Your priorities decide which trade-offs matter. What works for a young professional differs from a family with children. Check back for updated figures as new data comes in.
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 SA1 5SN
What broadband speeds are available at SA1 5SN?
100% of premises can get superfast broadband here. Top listed speed is Gigabit (1Gbps+).
Can I get gigabit broadband at SA1 5SN?
100% of premises here can get gigabit-capable broadband.
What are house prices like near SA1 5SN?
Recent sale data is limited around SA1 5SN, which often happens in mixed-use or low-turnover areas.
What schools are near SA1 5SN?
School data is not loaded for this postcode yet.
What is the flood risk at SA1 5SN?
SA1 5SN is marked as Low flood risk in the current dataset.
How is air quality around SA1 5SN?
Air quality data is not loaded for this postcode yet.
Are there GP surgeries near SA1 5SN?
GP access data for this postcode is not loaded yet.
What transport links does SA1 5SN have?
Transport station data is not loaded for this postcode yet.
Is there mobile coverage at SA1 5SN?
Outdoor 4G coverage is listed at 95% and 5G at undefined% for the wider area.
Can I charge an EV near SA1 5SN?
EV charging data is not loaded for this postcode yet.
What council tax band is common near SA1 5SN?
Council tax distribution is not loaded for this postcode yet.
What makes SA1 5SN different from nearby areas?
SA1 5SN has its own mix of broadband coverage, local services, prices, and environmental signals. That is why postcode-level pages are more useful than generic town guides.
Should I compare SA1 5SN with nearby postcodes?
Yes. Small postcode changes can mean different prices, flood signals, and service access.
Is SA1 5SN worth checking in person?
Yes. The numbers narrow the shortlist, but walking the street still tells you things no dataset can.
How current is the data for SA1 5SN?
This page uses official datasets that update on different cycles, so it is best used as a strong screening tool.
Map
Area info
Parish
Castle
District
Swansea
Region
Constituency
LSOA
W01000745
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