Broadband in Windsor and Maidenhead
Coverage, speeds and prices for 4,304 postcodes across 12 postcode districts. Real data from Ofcom, Land Registry and Police.uk.
Superfast
97%
Full fibre
2%
Gigabit
80%
Postcodes
4,304
Just 0.3% of postcodes in Windsor and Maidenhead fall below 10 Mbps. Across 4,304 postcodes and 12 outward codes, genuinely slow connections have almost disappeared.
Browse Windsor and Maidenhead by postcode district
Windsor and Maidenhead covers 12 postcode districts with 4,304 postcodes in total. Coverage varies district by district, so pick yours for a full breakdown.
RG10
111 postcodes
97% superfast
59% full fibre
RG40
3 postcodes
100% superfast
100% full fibre
RG42
9 postcodes
94% superfast
94% full fibre
RG9
2 postcodes
100% superfast
100% full fibre
SL3
169 postcodes
98% superfast
0% full fibre
SL4
1,163 postcodes
93% superfast
0% full fibre
SL5
631 postcodes
98% superfast
0% full fibre
SL6
2,089 postcodes
99% superfast
0% full fibre
SL7
23 postcodes
97% superfast
0% full fibre
SL8
1 postcodes
100% superfast
0% full fibre
TW18
7 postcodes
100% superfast
TW19
96 postcodes
96% superfast
Broadband speeds in Windsor and Maidenhead
Share of premises by the fastest download speed available, averaged across every Windsor and Maidenhead postcode.
The bottom of the market tells the clearest story. A 0.3% sub-10 Mbps share means slow broadband has been all but eliminated, working out at only around a dozen of the borough's 4,304 postcodes. Superfast availability is 96.8%, in line with the UK average of about 97%, so an ordinary fast connection is close to universal. Gigabit-capable coverage reaches 80.9% of postcodes, much of it via cable network coverage. That leaves roughly one postcode in five without a gigabit option, the only real gap in an otherwise comfortable picture. For households the practical reading is simple. Almost any address in the borough will support remote work, streaming and a house full of connected devices without drama. The question worth asking before signing anything is whether a specific postcode falls inside the 80.9% with a gigabit path or the minority without one.
Source: Ofcom Connected Nations. Percentages are averages of postcode-level availability, so rows may not sum to exactly 100%.
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Windsor and Maidenhead at a glance
Buyers can treat baseline connectivity as a given here and focus on the top end. With superfast at 96.8% and the slow tail at 0.3%, the downside risk of a badly connected address is minimal. What varies is headroom. An address inside the 80.9% gigabit footprint can scale to whatever a household throws at it. The remainder still get fast service, just without the same ceiling.
Remote worker score
54/100
Connectivity and amenities for home working
Family score
50/100
Schools, safety and family amenities
Windsor and Maidenhead broadband FAQs
How reliable is broadband coverage in Windsor and Maidenhead?
Very. Superfast reaches 96.8% of postcodes and only 0.3% fall below 10 Mbps.
What fraction of the borough can order gigabit speeds?
80.9% of its 4,304 postcodes.
Are there still slow broadband addresses in Windsor and Maidenhead?
A handful. The 0.3% below 10 Mbps equates to around a dozen postcodes borough-wide.
Which outward codes does the borough include?
Twelve, among them SL3, SL4, SL5, SL6, SL7 and SL8.
Does Windsor and Maidenhead match the UK average for superfast coverage?
Almost exactly. Its 96.8% sits alongside the national average of roughly 97%.
Check your exact postcode
Every postcode in Windsor and Maidenhead 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