SA1 postcode
Broadband in SA1 5JN
Castle, Swansea
Superfast broadband covers 100% of premises here.
Free, independent comparison · Ofcom verified data
Flood Risk
Low
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 SA1 5JN 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 SA1 5JN.
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) | 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 SA1 5JN
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 5JN 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.
Internet coverage here is good. Superfast (30Mbps+) reaches 100% of premises. The UK average is around 93%. Castle beats that. Enough for streaming, video calls, and smart home devices. No gigabit connections available yet. Top speeds listed as unknown.
Next-gen fibre infrastructure covers 100% of premises. Most of the area has modern fibre connections.
Limited house price data for SA1 5JN. 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.
Every figure on this page has a source. Ofcom for broadband. Police.uk for crime. Land Registry for house prices. ONS for demographics. Environment Agency for flood risk. Ookla for real speed tests. We don't estimate or interpolate. If the data isn't available, we say so.
Numbers only go so far. Visit SA1 5JN 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.
That's the full picture for SA1 5JN based on the latest data. Every area has trade-offs. These numbers help you spot them before you commit. Drill into each section above for the details. Compare several postcodes side by side. The right choice depends on what matters most to you. We refresh this data regularly.
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 5JN
What broadband speeds are available at SA1 5JN?
100% of premises can get superfast broadband here. Top listed speed is ~30 Mbps.
Can I get gigabit broadband at SA1 5JN?
0% of premises here can get gigabit-capable broadband.
What are house prices like near SA1 5JN?
Recent sale data is limited around SA1 5JN, which often happens in mixed-use or low-turnover areas.
What schools are near SA1 5JN?
School data is not loaded for this postcode yet.
What is the flood risk at SA1 5JN?
SA1 5JN is marked as Low flood risk in the current dataset.
How is air quality around SA1 5JN?
Air quality data is not loaded for this postcode yet.
Are there GP surgeries near SA1 5JN?
GP access data for this postcode is not loaded yet.
What transport links does SA1 5JN have?
Transport station data is not loaded for this postcode yet.
Is there mobile coverage at SA1 5JN?
Outdoor 4G coverage is listed at 95% and 5G at undefined% for the wider area.
Can I charge an EV near SA1 5JN?
EV charging data is not loaded for this postcode yet.
What council tax band is common near SA1 5JN?
Council tax distribution is not loaded for this postcode yet.
What makes SA1 5JN different from nearby areas?
SA1 5JN 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 5JN with nearby postcodes?
Yes. Small postcode changes can mean different prices, flood signals, and service access.
Is SA1 5JN 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 5JN?
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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