SL4 postcode
Broadband in SL4 4NP
Windsor and Maidenhead, Windsor and Maidenhead
Gigabit broadband is available at this postcode.
Free, independent comparison · Ofcom verified data · Updated 3 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 4NP. That covers your 14 Mbps needs with room to spare.
Speed Test
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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) | 98% | 98% | 100-300 Mbps |
| Full Fibre (FTTP) | 0% | 0% | 300-900 Mbps |
| Gigabit | 98% | 98% | 900-1,000 Mbps |
Speed Distribution at SL4 4NP
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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SL4 4NP sits in Windsor and Maidenhead. This guide covers broadband speeds, house prices, schools, and more. Every figure comes from verified public data sources. Use it alongside your own research when comparing areas.
Superfast broadband (30 Mbps+) coverage at SL4 4NP stands at 100%. That is above the UK average of 93%. Ultrafast broadband (100 Mbps+) reaches 97.9% of properties. That is solid coverage for bandwidth-heavy households. Gigabit-capable connections cover 97.9% of premises. Most homes can access gigabit speeds if they choose to.
Here is how broadband speeds break down across premises at SL4 4NP. 2.1% of connections fall in the 30 to 300 Mbps range. 97.9% 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.
Translating the numbers at SL4 4NP into daily use gives a clearer picture. Most premises have superfast speeds. Remote working with video calls and cloud tools should be manageable for most households.
Fixed Wireless Access is not currently available at SL4 4NP. For properties without fibre, 4G or 5G home broadband from Three, EE, or Vodafone may be an alternative.
0% of premises at SL4 4NP 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 4NP 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 4NP 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 SL4 4NP: remote working 55/100, family 50/100, value 50/100. Remote workers may want to verify actual speeds before committing.
The local authority for SL4 4NP is Windsor and Maidenhead. The SL4 postcode area contains 1282 postcodes on this site. Superfast broadband across SL4 ranges from 0% to 100%. SL4 4NP is above the area average of 93%.
How does SL4 4NP compare to its neighbours? SL4 4NR (0.05 miles, windsor-and-maidenhead-unparished-area) has 100% superfast coverage and 77.8% gigabit. SL4 4NH (0.05 miles, windsor-and-maidenhead-unparished-area) has 100% superfast coverage and 100% gigabit. SL4 4NW (0.05 miles, windsor-and-maidenhead-unparished-area) has 100% superfast coverage and 100% gigabit. SL4 4NS (0.06 miles, windsor-and-maidenhead-unparished-area) has 100% superfast coverage and 100% gigabit. Coverage is broadly similar across these neighbouring postcodes.
Broadband availability varies by provider and by property. At SL4 4NP, 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.
Windsor and Maidenhead offers a mix of residential properties and local amenities. The character of any area is best judged in person.
Pulling the data together for SL4 4NP, here is what stands out. Connectivity at SL4 4NP is a strength. Strong broadband coverage gives flexibility for both working and leisure. The area scores well on that front. 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. Windsor and Maidenhead 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 SL4 4NP, 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.
SL4 4NP in Windsor and Maidenhead: broadband, house prices, crime, schools, and more. All from verified sources. Run a speed test above for a live reading. Compare with nearby postcodes to see how this area stacks up against its neighbours.
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 4NP
What are the broadband speeds available at SL4 4NP?
Superfast broadband (30 Mbps+) is available to 100% of premises at SL4 4NP. Ultrafast coverage is at 97.9%.
What is the average house price near SL4 4NP?
No recent house price data is available for SL4 4NP.
What is the flood risk for properties at SL4 4NP?
SL4 4NP has a High flood risk rating. Check Environment Agency maps for detail.
What schools are nearby in the SL4 4NP area?
School data for SL4 4NP is being updated. Check the Get Information About Schools service for the latest.
How does crime rate in SL4 4NP compare to other areas?
Crime data for this area is being updated.
How suitable is SL4 4NP for remote working?
SL4 4NP scores 55/100 for remote working suitability. Speeds may limit video-heavy workflows.
What is the mobile signal like at SL4 4NP?
4G outdoor coverage at SL4 4NP is 95%. Indoor coverage may be lower.
What is the most common energy efficiency rating near SL4 4NP?
EPC data for SL4 4NP is being updated. Check the EPC register for individual property ratings.
What is the council tax band distribution at SL4 4NP?
Council tax band information for SL4 4NP is being updated.
How accessible are GP surgeries near SL4 4NP?
GP surgery data for SL4 4NP is being updated. Check NHS.uk for the latest.
What transport links are available near SL4 4NP?
Transport data for SL4 4NP is being updated.
Is SL4 4NP a suitable area for families?
SL4 4NP scores 50/100 for family suitability. Check school and crime sections above for detail.
What is the air quality like at SL4 4NP?
Air quality data for SL4 4NP is being updated.
How far is the nearest EV charging point from SL4 4NP?
EV charging data for SL4 4NP is being updated. Check Zap-Map for the latest.
Can I get full fibre broadband at SL4 4NP?
Ultrafast broadband (100 Mbps+) reaches 97.9% of premises. Check Openreach and local operators for FTTP availability.
Area suitability scores
SL4 4NPRemote Worker
55Based 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
Area info
Parish
Windsor and Maidenhead
District
Windsor and Maidenhead
Region
Constituency
LSOA
E01016557
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