SL3 postcode

Broadband in SL3 9NY

Horton, Windsor and Maidenhead

Gigabit broadband is available at this postcode.

Best speedGigabit (1Gbps+)
StandardSuperfastGigabit
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Free, independent comparison · Ofcom verified data

Flood Risk

High

Fibre (FTTP)

No

Best speed

Gigabit (1Gbps+)

Reviewed by Sage Mitchell

Speed Calculator

Adjust the options below to see how much broadband speed your household needs.

2
18

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.

Estimated speed needed14 Mbps

Gigabit broadband (Gigabit (1Gbps+)) is available at SL3 9NY. That covers your 14 Mbps needs with room to spare.

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Speed Test

Check your current download speed and see how it compares to what is available at SL3 9NY.

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.

Living near SL3 9NY

Considering Horton? SL3 9NY sits in the Windsor and Maidenhead 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.

Strong broadband in this part of Horton. Superfast (30Mbps+) reaches 100% of premises. The UK average is around 93%. Horton beats that. Ultrafast (100Mbps+) covers 100%. That puts Horton 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 SL3 9NY. 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.

Flood risk: High. Zone: Zone 1. Higher flood risk area. Check the Environment Agency flood map in detail. This will affect insurance costs. Air quality: Unknown.

No public EV chargers recorded nearby. Home charging would be the main option. Check Zap-Map for the latest charger locations.

4G outdoor coverage: 95%. Good coverage. Some indoor dead spots possible. Data is at local authority level from Ofcom. Street-level signal can vary. Buildings and terrain affect actual reception. Try your handset on-site before switching provider.

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.

Before committing to SL3 9NY, visit at different times. Morning rush hour tells you about traffic and parking. Evening shows you noise levels. Weekends reveal how busy local shops and parks get. Check the walk to the nearest school or station yourself.

That's the full picture for SL3 9NY 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.

Broadband availability

Source: Ofcom Connected Nations 2025 (Jul 2025)

TechnologyAvailableCoverageTypical 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)0%
0%
300-900 Mbps
Gigabit100%
100%
900-1,000 Mbps

Speed Distribution at SL3 9NY

100%
300+ Mbps (100%)

Source: Ofcom Connected Nations 2025

Mobile coverage

4G & 5G coverage · Ofcom Connected Nations 2025

4G Outdoor

95%

4G Indoor

85%

5G Outdoor

%

Networks with 4G

EEO2ThreeVodafone
Ofcom Connected Nations 2025

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Map

Schools nearby

Nearest schools within 5 miles · Ofsted ratings as at Jan 2026

Schools data is currently unavailable.

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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

Environment Agency

Council tax bands

Band distribution for Windsor and Maidenhead

Most common: Band

A
5%£1,381
B
10%£1,611
C
20%£1,841
D
25%£2,071
E
20%£2,531
F
10%£2,991
G
8%£3,452
H
2%£4,142

Annual council tax estimates for , 2024/25

VOA (Valuation Office Agency)

Transport links

Nearest train stations and towns

Nearest train stations

No train stations found within 15 miles

Network Rail / National Rail · Straight-line distances

Air quality

Particulate matter & nitrogen dioxide levels

air quality

Air quality data not available.

PM2.5 (fine particles) μg/m³

WHO guideline: 15 μg/m³

PM10 (coarse particles) μg/m³

WHO guideline: 45 μg/m³

NO₂ (nitrogen dioxide) μg/m³

WHO guideline: 25 μg/m³

DEFRA UK-AIR · Guidelines: WHO 2021

Area info

Parish

Horton

District

Windsor and Maidenhead

Region

Constituency

LSOA

E01016577

Frequently asked questions about SL3 9NY

What are the broadband speeds available at SL3 9NY?

Superfast broadband (30Mbps+) is available to 100% of premises at SL3 9NY. Maximum download speeds reach not confirmed. Ultrafast coverage is at 100%.

What is the average house price near SL3 9NY?

No recent house price data for SL3 9NY. Few residential sales on record, or mainly commercial properties.

What is the flood risk for properties at SL3 9NY?

SL3 9NY has a High flood risk rating, classified as Unknown by the Environment Agency. Check the Environment Agency flood map for detailed risk information.

What is the mobile signal like at SL3 9NY?

4G outdoor coverage at SL3 9NY is 95%, with 5G outdoor at not yet available. Networks available include EE, O2, Three, Vodafone. Data is at local authority level from Ofcom Connected Nations.

What is the most common energy efficiency rating for homes near SL3 9NY?

EPC data is not yet available for SL3 9NY. Energy Performance Certificates are recorded when properties are sold or rented. Check the EPC register at epc.opendatacommunities.org for individual property ratings.

What is the air quality like at SL3 9NY?

Air quality at SL3 9NY is rated Unknown with PM2.5 levels at not measured. Check Open-Meteo for detailed air quality forecasts.

How far is the nearest EV charging point from SL3 9NY?

EV charging data is not yet available for SL3 9NY. Check Zap-Map (zap-map.com) for the latest public charging locations near you.

Can I get full fibre broadband at SL3 9NY?

Ultrafast broadband (100Mbps+) is available to 100% of premises at SL3 9NY. Gigabit coverage reaches 100%. Providers like BT, Virgin Media, or local full fibre operators may serve this area.

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