SL4 postcode
Broadband in SL4 2JL
Old Windsor, Windsor and Maidenhead
Gigabit broadband is available at this postcode.
Free, independent comparison · Ofcom verified data · Updated 19 March 2026
Flood Risk
High
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 SL4 2JL. 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 SL4 2JL.
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) | 73% | 73% | 10-20 Mbps |
| Superfast (30+ Mbps) | 73% | 73% | 30-80 Mbps |
| Ultrafast (100+ Mbps) | 73% | 73% | 100-300 Mbps |
| Full Fibre (FTTP) | 0% | 0% | 300-900 Mbps |
| Gigabit | 73% | 73% | 900-1,000 Mbps |
Speed Distribution at SL4 2JL
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 Windsor and Maidenhead
Most common: Band
Annual council tax estimates for , 2024/25
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Check Deals →Living near SL4 2JL
This is the area guide for SL4 2JL, located in Old Windsor (Windsor and Maidenhead). It covers connectivity, property, safety, and local services. Every claim links back to a specific data point. Read on for the detail.
Superfast broadband (30 Mbps+) coverage at SL4 2JL stands at 72.7%. That is below the UK average of 93%. Ultrafast broadband (100 Mbps+) reaches 72.7% of properties. Over half of premises have access to faster tiers. Gigabit-capable connections cover 72.7% of premises. Gigabit is available but not yet widespread at this postcode.
Looking at the full speed profile for SL4 2JL gives a better picture of what to expect. 27.3% of connections fall in the 10 to 30 Mbps range. 72.7% of connections fall in the 300 Mbps or faster range. No premises here are stuck below 5 Mbps. Every property meets the basic threshold for video calls. Over half of connections exceed 300 Mbps. That supports multiple 4K streams, large file transfers, and cloud gaming without issue.
Here is how the broadband at SL4 2JL maps against common household needs.
Fixed Wireless Access is not currently available at SL4 2JL. For properties without fibre, 4G or 5G home broadband from Three, EE, or Vodafone may be an alternative.
0% of premises at SL4 2JL 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 SL4 2JL 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 SL4 2JL 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 SL4 2JL: remote working 35/100, family 50/100, value 50/100. Remote workers may want to verify actual speeds before committing.
The local authority for SL4 2JL is Windsor and Maidenhead. The immediate area is Old Windsor, a distinct community within the wider district. The SL4 postcode area contains 1282 postcodes on this site. Superfast broadband across SL4 ranges from 0% to 100%. SL4 2JL is below the area average of 93%.
How does SL4 2JL compare to its neighbours? SL4 2SE (0.02 miles, old-windsor) has 100% superfast coverage and 100% gigabit. SL4 2SS (0.03 miles, old-windsor) has 100% superfast coverage and 100% gigabit. Neighbouring postcodes tend to have better superfast coverage.
Not every property at SL4 2JL gets the same speeds. Run a postcode check with each provider before signing up. Headline speeds are not guarantees. 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.
Life in Old Windsor depends on what matters to you. Broadband, transport, and local services vary by street.
What does all of this mean for someone considering SL4 2JL? Windsor and Maidenhead 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. Old Windsor 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.
Data is a starting point for Old Windsor. Walk the streets at different times. Test your mobile signal. Check parking, noise levels, and the feel of the neighbourhood. Run a speed test on the actual connection. Some things only a visit can reveal.
This covers the key data for SL4 2JL. Broadband, property, schools, safety, and local services all in one place. For area-wide trends, see the Old Windsor hub page. Bookmark this page and check back as new data arrives.
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 SL4 2JL
What are the broadband speeds available at SL4 2JL?
Superfast broadband (30 Mbps+) is available to 72.7% of premises at SL4 2JL. Ultrafast coverage is at 72.7%.
What is the average house price near SL4 2JL?
No recent house price data is available for SL4 2JL.
What is the flood risk for properties at SL4 2JL?
SL4 2JL has a High flood risk rating. Check Environment Agency maps for detail.
What schools are nearby in the SL4 2JL area?
School data for SL4 2JL is being updated. Check the Get Information About Schools service for the latest.
How does crime rate in SL4 2JL compare to other areas?
Crime data for this area is being updated.
How suitable is SL4 2JL for remote working?
SL4 2JL scores 35/100 for remote working suitability. Speeds may limit video-heavy workflows.
What is the mobile signal like at SL4 2JL?
4G outdoor coverage at SL4 2JL is 95%. Indoor coverage may be lower.
What is the most common energy efficiency rating near SL4 2JL?
EPC data for SL4 2JL is being updated. Check the EPC register for individual property ratings.
What is the council tax band distribution at SL4 2JL?
Council tax band information for SL4 2JL is being updated.
How accessible are GP surgeries near SL4 2JL?
GP surgery data for SL4 2JL is being updated. Check NHS.uk for the latest.
What transport links are available near SL4 2JL?
Transport data for SL4 2JL is being updated.
Is SL4 2JL a suitable area for families?
SL4 2JL scores 50/100 for family suitability. Check school and crime sections above for detail.
What is the air quality like at SL4 2JL?
Air quality data for SL4 2JL is being updated.
How far is the nearest EV charging point from SL4 2JL?
EV charging data for SL4 2JL is being updated. Check Zap-Map for the latest.
Can I get full fibre broadband at SL4 2JL?
Ultrafast broadband (100 Mbps+) reaches 72.7% of premises. Check Openreach and local operators for FTTP availability.
Area suitability scores
SL4 2JLRemote 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.
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Area info
Parish
Old Windsor
District
Windsor and Maidenhead
Region
Constituency
LSOA
E01016589
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