AL4 broadband and area guide
Ofcom coverage, connection speeds, house prices and local data for 778 postcodes across 3 sectors in St Albans.
Gigabit
87%
Superfast
94%
Postcodes
778
AL4 in Hertsmere holds 778 postcodes with very high gigabit penetration at 88.1%, yet 2.1% below 10 Mbps suggest pockets of poor service.
Broadband speeds in AL4
Share of AL4 premises by the fastest download speed available, averaged across all 778 postcodes in the district.
AL4 shows a puzzling infrastructure pattern. Gigabit speeds are standard, reaching 88.1% of postcodes. Superfast coverage spans 94.4%, and below-universal service obligation areas are minimal at 0.3%. Yet within this well-provisioned market, 2.1% of postcodes fall below 10 Mbps. This anomaly likely represents scattered postcodes where older copper infrastructure persists, creating slow speeds within and near the modern gigabit footprint. The speed distribution reflects this paradox: 88.1% at gigabit, 6.4% in the 30 to 300 Mbps tier, and 2.1% below 10 Mbps. AL4 is well-connected overall, but the presence of sub-10Mbps postcodes within a broadly gigabit-enabled area suggests infrastructure investment has been selective, skipping certain streets or premises.
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
AL4 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 |
|---|---|---|---|---|
| AL4 0 | 284 | 96% | TBC | 92% |
| AL4 8 | 208 | 90% | TBC | 76% |
| AL4 9 | 286 | 96% | TBC | 92% |
All AL4 0 postcodes (284)
All AL4 8 postcodes (208)
All AL4 9 postcodes (286)
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Living in St Albans
AL4 is well-connected overall, but the presence of sub-10Mbps postcodes within a broadly gigabit-enabled area suggests infrastructure investment has been selective, skipping certain streets or premises.
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
AL4 broadband FAQs
Can most AL4 postcodes access gigabit?
88.1% qualify for gigabit speeds.
Why are some AL4 postcodes below 10 Mbps?
The data does not explain the cause, only that 2.1% sit there.
What's the superfast coverage in AL4?
94.4% of postcodes, leaving a small underserved minority.
How can I confirm my AL4 address will get fast broadband?
Request a check from your provider. Odds favour gigabit, but the 2% below-10Mbps postcodes prove variance exists.
Neighbouring districts
Check your exact postcode
Every postcode in AL4 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