AL7 postcode area guide — Welwyn Hatfield

Where is AL7?

Broadband & internet speeds in AL7

Excellent coverage

Broadband availability in the AL7 postcode district (Welwyn Hatfield) is Excellent — gigabit-capable full fibre is widely available. Across the 851 postcodes Ofcom measures in AL7, superfast broadband (30 Mbit/s or faster) reaches 97.5% of premises and gigabit-capable lines are available to 90%.

Around 0% of premises in AL7 fall below the Universal Service Obligation (a minimum of 10 Mbit/s download and 1 Mbit/s upload), so the overwhelming majority of homes and businesses here can already order a decent fixed line. For a business that depends on its connection, the figures that matter most are gigabit and full-fibre availability — the symmetric, low-contention services we quote leased lines and FTTP against.

Sample postcodes in AL7

Run a speed test to see what you're actually getting, or check your exact postcode.

Mobile signal around Welwyn Hatfield

Ofcom's coverage model for the wider Welwyn Hatfield district (52,289 premises):

Signal varies street by street — use the mobile coverage checker to compare EE, O2, Three and Vodafone at an exact postcode.

Crime in AL7

Police recorded 362 incidents within about a mile of the centre of AL7 in May 2026 (latest published street-level data). The breakdown:

Raw counts favour busy town centres — a high street with shops and nightlife records more incidents than a residential cul-de-sac. Source: police.uk open data (point sample around the district centroid).

House prices in AL7

Based on 319 sales registered with HM Land Registry in the last 12 months, the median sold price in AL7 is £385,000, down 1.3% on the previous year (£390,000).

Latest recorded sales in AL7

Contains HM Land Registry data © Crown copyright and database right 2026, licensed under the Open Government Licence v3.0.

Who lives here? Welwyn Hatfield demographics

Census 2021 figures for the wider Welwyn Hatfield district (119,834 residents, 46,209 households):

Source: ONS Census 2021 (district level — the finest openly licensed cut we republish). © Crown copyright, OGL v3.0.

Schools in and around AL7

Source: DfE Get Information about Schools (England & Wales). Check Ofsted report cards for inspection detail — headline one-word grades were retired in 2024.

Food hygiene ratings in AL7

124 rated food businesses operate in AL7. 81 hold the top rating of 5, 20 are rated 4, and none are currently rated 2 or below.

Among the 5-rated: Aldi, Annabel School, Aspens Services Ltd@Waterside Academy, Attimore Barn Pre-School, Attimore Hall.

Source: Food Standards Agency, food hygiene ratings (FHRS) open data.

Energy performance (EPC) in AL7

From a sample of 158 Energy Performance Certificates across 9 AL7 postcodes, the most common rating is band B (average band C). 80% of sampled homes are rated C or better.

Source: MHCLG Energy Performance of Buildings Data (England & Wales), sampled at postcode level and refreshed monthly. Individual certificates are on each postcode’s page.

Phone area codes for Welwyn Hatfield

Landlines around AL7 typically use:

Had a call from an unknown number? Use our free UK phone number checker to see who called.

What's it like living in AL7?

Postcodes in AL7

Neighbouring districts

All St Albans (AL) postcode districts ›

Frequently asked questions

Sources: HM Land Registry Price Paid Data, police.uk street-level crime, Ofcom Connected Nations, ONS Census 2021, DfE Get Information about Schools, Food Standards Agency FHRS — all © Crown copyright, licensed under the Open Government Licence v3.0. Figures are area aggregates; individual addresses vary. Energy performance (EPC) data will be added when our Open Data Communities registration is approved.