CM12 broadband and area guide
Ofcom coverage, connection speeds, house prices and local data for 489 postcodes across 2 sectors in Basildon.
Full fibre
0%
Gigabit
87%
Superfast
99%
Postcodes
489
CM12 encompasses 489 postcodes in Basildon with 87.2% gigabit and strong cable presence.
Broadband speeds in CM12
Share of CM12 premises by the fastest download speed available, averaged across all 489 postcodes in the district.
Cable gigabit networks are well-established here, reaching 87.2% of postcodes. Speed tiers show: 87.2% achieve 300 Mbps or higher, 11.4% sit at 30 to 300 Mbps, and only 0.2% fall below 10 Mbps. Zero below-USO premises and no wireless deployment. The narrow slow-speed tail and high gigabit rate reflect cable infrastructure dominance. CM12 is better connected than nearby CM11, likely due to newer residential development or more recent cable investment waves. The 11.4% mid-speed postcodes still deliver superfast service and are not underserved by modern standards. Buyers and renters should expect gigabit as a likely outcome when searching for properties in this postcode area, though individual addresses warrant verification.
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
CM12 splits into 2 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 |
|---|---|---|---|---|
| CM12 0 | 265 | 100% | 0% | 88% |
| CM12 9 | 224 | 97% | 0% | 87% |
All CM12 0 postcodes (265)
All CM12 9 postcodes (224)
Best deals
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Living in Basildon
CM12 is better connected than nearby CM11, likely due to newer residential development or more recent cable investment. The 11.4% mid-speed postcodes still deliver superfast service and are not underserved.
Remote worker score
55/100
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
CM12 broadband FAQs
Is CM12 fully cable-connected?
Nearly: 87.2% of postcodes are gigabit-ready via cable. The remaining 12.6% access superfast at 30 Mbps and above via fibre or copper.
Are there any very slow postcodes?
No. Only 0.2% fall below 10 Mbps, making this a well-served district.
How does CM12 compare to CM11?
CM12 has slightly higher gigabit reach and fewer mid-speed postcodes. Both Basildon areas offer good overall service.
Will my speed choice impact moving costs?
Not directly. Use the Checker to compare gigabit and superfast offerings for your specific postcode and address.
Neighbouring districts
Check your exact postcode
Every postcode in CM12 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