SL4 broadband and area guide
Ofcom coverage, connection speeds, house prices and local data for 1,282 postcodes across 6 sectors in Windsor and Maidenhead.
Full fibre
0%
Gigabit
77%
Superfast
93%
Postcodes
1,282
SL4 covers 1,282 postcodes across Bracknell Forest with good gigabit reach. Seven in ten postcodes support 300+ Mbps, though coverage is less uniform than nearby SL5.
Broadband speeds in SL4
Share of SL4 premises by the fastest download speed available, averaged across all 1,282 postcodes in the district.
Gigabit availability stands at 77.1%, serving most of Bracknell Forest through cable networks. Superfast (30 Mbps) is near-universal at 92.9%. The 78.5% gigabit-capable share translates to 300+ Mbps speeds for most households; 14.4% access the 30-300 Mbps tier, which remains fit for purpose for remote work and streaming. Below-10Mbps postcodes account for just 0.6%, a small anomaly in otherwise healthy coverage. The absence of full fibre means cable remains the sole gigabit carrier across SL4. For the majority, speeds are not a barrier; choice between cable ISPs is the practical decision.
Source: Ofcom Connected Nations. Percentages are district-wide averages of postcode-level availability, so rows may not sum to exactly 100%.
Connectivity in detail
Below 10 Mbps USO
0%
Premises unable to get the 10 Mbps universal service minimum
Fixed wireless
0%
Premises that can use a fixed wireless access service
Broadband by sector
SL4 splits into 6 postcode sectors. Coverage and prices can differ street by street, so open a sector below to find your exact postcode.
| Sector | Postcodes | Superfast | Full fibre | Gigabit |
|---|---|---|---|---|
| SL4 1 | 150 | 75% | 0% | 41% |
| SL4 2 | 213 | 95% | 0% | 84% |
| SL4 3 | 235 | 99% | 0% | 82% |
| SL4 4 | 288 | 96% | 0% | 88% |
| SL4 5 | 250 | 98% | 0% | 87% |
| SL4 6 | 146 | 83% | 0% | 60% |
All SL4 1 postcodes (150)
All SL4 2 postcodes (213)
All SL4 3 postcodes (235)
All SL4 4 postcodes (288)
All SL4 5 postcodes (250)
All SL4 6 postcodes (146)
Best deals
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Living in Windsor and Maidenhead
SL4's 1,282 postcodes span suburban and commuter-belt properties. With gigabit so prevalent, broadband quality is not a constraint on moving decisions here, though patch checks remain prudent given the size of the area.
Remote worker score
54/100
Connectivity and amenities for home working
Family score
50/100
Schools, safety and family amenities
Value score
50/100
What you get for the local price level
SL4 broadband FAQs
Is there gigabit cable here?
Yes. 77.1% of SL4 postcodes can access gigabit speeds via cable networks. The remaining postcodes support 30-300 Mbps, which is adequate for most households.
What about the postcodes below 10 Mbps?
Only 0.6% fall into that bracket, so the risk is minimal. Nonetheless, verify your specific postcode before moving or signing contracts.
Why no full fibre?
SL4 has no full fibre infrastructure recorded; cable is the primary gigabit pathway. Fibre may arrive in future rollouts, but today cable dominates.
How does SL4 stack up regionally?
Gigabit at 77.1% is solid for the South East but trails the very best districts. It mirrors the regional cable-build pattern where roll-out has been gradual and selective.
Neighbouring districts
Check your exact postcode
Every postcode in SL4 has its own page with broadband speeds, house prices, school ratings and crime stats. You can also compare providers for your address.
Data sources: Broadband data from Ofcom Connected Nations 2025 · House prices from HM Land Registry · Crime from Police.uk · See all data sources