SW18 broadband and area guide
Ofcom coverage, connection speeds, house prices and local data for 1,177 postcodes across 6 sectors in Wandsworth.
Full fibre
94%
Gigabit
94%
Superfast
99%
Postcodes
1,177
SW18 (Merton) is the second-largest postcode in this batch at 1,177 postcodes, with 93.5 per cent full fibre, matching SW17 as one of London's elite performers.
Broadband speeds in SW18
Share of SW18 premises by the fastest download speed available, averaged across all 1,177 postcodes in the district.
SW18's scale and fibre penetration combine to deliver exceptional coverage. 99.2 per cent of the 1,177 postcodes reach superfast broadband, 96.5 per cent access ultrafast (300+ Mbps), and 93.5 per cent are fully served by full fibre. The speed distribution is heavily skewed toward the top: 94.8 per cent at 300+ Mbps and 4.4 per cent at 30 to 300 Mbps. Only 0.1 per cent breach the Universal Service Obligation threshold, but no postcodes fall below 10 Mbps in recorded data. SW18 represents gigabit-network deployment at scale within a single postcode area. Full fibre saturation at 93.5 per cent and ultrafast coverage at 96.5 per cent indicate complete FTTP or hybrid-fibre infrastructure.
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
<1%
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
SW18 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 |
|---|---|---|---|---|
| SW18 1 | 314 | 100% | 94% | 94% |
| SW18 2 | 196 | 100% | 94% | 94% |
| SW18 3 | 209 | 100% | 96% | 96% |
| SW18 4 | 238 | 97% | 89% | 89% |
| SW18 5 | 219 | 100% | 95% | 95% |
| SW18 9 | 1 | 100% | 100% | 100% |
All SW18 1 postcodes (314)
All SW18 2 postcodes (196)
All SW18 3 postcodes (209)
All SW18 4 postcodes (238)
All SW18 5 postcodes (219)
All SW18 9 postcodes (1)
Best deals
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Living in Wandsworth
SW18 represents gigabit-network deployment at scale within a single postcode area. Full fibre saturation at 93.5 per cent and ultrafast coverage at 96.5 per cent indicate complete FTTP or hybrid-fibre infrastructure. This large postcode area has transcended basic connectivity into service-plan territory.
Crime per month
2
Average recorded crimes per local statistical area
Remote worker score
100/100
Connectivity and amenities for home working
Family score
80/100
Schools, safety and family amenities
Value score
50/100
What you get for the local price level
SW18 broadband FAQs
Why is SW18 considered one of London's top-performing postcodes?
93.5 per cent full fibre and 96.5 per cent ultrafast penetration place SW18 in the elite tier. At 1,177 postcodes, it delivers these metrics at significant scale.
How many postcodes in SW18 sit below the gigabit-capable bracket?
Only 4.4 per cent sit below 300 Mbps, all at the 30 to 300 Mbps mid-tier.
What does the 0.1 per cent Universal Service Obligation gap represent?
One postcode of 1,177 falls between 10 and 10 Mbps baseline. Likely a data anomaly or isolated premise.
Is SW18 uniformly fast across its postcode area?
Yes. 94.8 per cent sit at gigabit speeds and 4.4 per cent at mid-tier. No meaningful variation in SW18.
Neighbouring districts
Check your exact postcode
Every postcode in SW18 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