SW1Y broadband and area guide
Ofcom coverage, connection speeds, house prices and local data for 167 postcodes across 3 sectors in Westminster.
Full fibre
96%
Gigabit
96%
Superfast
96%
Postcodes
167
SW1Y in Westminster is the most widely connected code in this batch, with gigabit reaching 96.3% of all 167 postcodes.
Broadband speeds in SW1Y
Share of SW1Y premises by the fastest download speed available, averaged across all 167 postcodes in the district.
Gigabit and full fibre both reach 96.3%, meaning nearly every address can access networks capable of 300 Mbps sustained speeds. Universal Service Obligation coverage is complete. The entire postcode divides between gigabit-capable premises and superfast; there is no 30-300 Mbps middle tier, indicating a recent and broad fibre rollout. This is among the best-connected small central London postcodes, likely reflecting the postcode's commercial and official importance. SW1Y's concentration around Downing Street, Parliament and major Whitehall offices has necessitated advanced telecommunications infrastructure. The postcode therefore displays what broad gigabit deployment looks like: nearly every premises has modern fibre access, with no slow segments. Few postcodes in the country match this level of uniform coverage.
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
SW1Y splits into 3 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 |
|---|---|---|---|---|
| SW1Y 4 | 65 | 98% | 98% | 98% |
| SW1Y 5 | 39 | 92% | 92% | 92% |
| SW1Y 6 | 63 | 97% | 97% | 97% |
All SW1Y 4 postcodes (65)
All SW1Y 5 postcodes (39)
All SW1Y 6 postcodes (63)
Best deals
Compare broadband deals in SW1Y
Deals are priced per address. Enter your full postcode to see every package available where you live.
Free comparison. Opens our deals partner in a new tab.
Living in Westminster
House price data is unavailable for SW1Y. Almost every property can support intensive broadband use cases without speed being a limiting factor.
Crime per month
14
Average recorded crimes per local statistical area
Remote worker score
99/100
Connectivity and amenities for home working
Family score
70/100
Schools, safety and family amenities
Value score
50/100
What you get for the local price level
SW1Y broadband FAQs
Why does SW1Y have the highest gigabit coverage in central London?
The postcode's concentration of government and commercial buildings has attracted high-capacity fibre investment.
Is every postcode gigabit-ready?
96.3% have gigabit infrastructure; 3.7% have superfast but fall short of gigabit capability.
Will I have speed problems in SW1Y?
Highly unlikely. 96.3% of premises support 300 Mbps or faster, and all meet minimum thresholds.
What if my address is in the 3.7% without gigabit?
You will still have superfast connectivity and can confirm the exact speed with your provider.
Neighbouring districts
Check your exact postcode
Every postcode in SW1Y 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