SM1 broadband and area guide
Ofcom coverage, connection speeds, house prices and local data for 806 postcodes across 5 sectors in Sutton.
Full fibre
0%
Gigabit
88%
Superfast
95%
Postcodes
806
SM1 spans 806 postcodes in Sutton with strong gigabit availability at 88%. Superfast coverage is 95.2%, reflecting South London suburban density.
Broadband speeds in SM1
Share of SM1 premises by the fastest download speed available, averaged across all 806 postcodes in the district.
Gigabit reaches 88%, delivering cable-based 1,000+ Mbps to nearly nine in ten postcodes across Sutton. Superfast sits at 95.2%, matching the UK baseline. Speed distribution is skewed toward the high end: 88.8% of postcodes sustain 300+ Mbps, 6.4% access the 30 to 300 Mbps band, and no postcodes fall below 10 Mbps. This uniformity reflects mature suburban infrastructure with full cable coverage. Cable networks provide all gigabit capacity; no full fibre infrastructure is recorded. Households in SM1 face few speed obstacles when selecting service. South London postcodes rarely combine high gigabit penetration with zero below-USO risk in this way.
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
SM1 splits into 5 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 |
|---|---|---|---|---|
| SM1 1 | 104 | 78% | 0% | 69% |
| SM1 2 | 246 | 99% | 0% | 93% |
| SM1 3 | 212 | 100% | 0% | 96% |
| SM1 4 | 228 | 95% | 0% | 90% |
| SM1 9 | 16 | 100% | 0% | 0% |
All SM1 1 postcodes (104)
All SM1 2 postcodes (246)
All SM1 3 postcodes (212)
All SM1 4 postcodes (228)
Best deals
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Living in Sutton
SM1's 806 postcodes represent a focused South London cluster. High gigabit availability combined with zero below-USO instances reflects dense urban serving. Moving to Sutton, prospective residents can expect strong connectivity throughout the postcode.
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
SM1 broadband FAQs
Can I get gigabit in SM1?
Yes, in 88% of postcodes via cable networks. That is almost nine in ten addresses with gigabit-capable infrastructure.
Are all postcodes covered?
No postcodes fall below 10 Mbps in SM1. Even the 12% outside gigabit reach 30+ Mbps, which meets practical needs.
No fibre here?
Correct. Cable is the sole gigabit route. Full fibre infrastructure is not recorded in SM1.
How does Sutton fare for broadband?
SM1 is Sutton's strong performer. 88% gigabit is well above average for South London. Other Sutton codes (SM6) are somewhat lower.
Neighbouring districts
Check your exact postcode
Every postcode in SM1 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