SG1 postcode area guide — North Hertfordshire

Where is SG1?

Broadband & internet speeds in SG1

Excellent coverage

Broadband availability in the SG1 postcode district (North Hertfordshire) is Excellent — gigabit-capable full fibre is widely available. Across the 1,186 postcodes Ofcom measures in SG1, superfast broadband (30 Mbit/s or faster) reaches 97.9% of premises and gigabit-capable lines are available to 82.7%.

Around 0% of premises in SG1 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 SG1

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

Mobile signal around North Hertfordshire

Ofcom's coverage model for the wider North Hertfordshire district (63,507 premises):

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

Crime in SG1

Police recorded 403 incidents within about a mile of the centre of SG1 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 SG1

Based on 437 sales registered with HM Land Registry in the last 12 months, the median sold price in SG1 is £350,000, up 2.3% on the previous year (£342,000).

Latest recorded sales in SG1

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

Who lives here? North Hertfordshire demographics

Census 2021 figures for the wider North Hertfordshire district (133,210 residents, 56,733 households):

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

Schools in and around SG1

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 SG1

386 rated food businesses operate in SG1. 270 hold the top rating of 5, 32 are rated 4, and 7 are rated 2 or below.

Among the 5-rated: 0Stevenage Fire And Ambulance Station, Abbington House, ACS Snacks, Airbus Defence & Space, Staff Restaurant, ALDI Stores Ltd.

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

Energy performance (EPC) in SG1

From a sample of 163 Energy Performance Certificates across 9 SG1 postcodes, the most common rating is band D (average band D). 45% 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 North Hertfordshire

Landlines around SG1 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 SG1?

Postcodes in SG1

Neighbouring districts

All Stevenage (SG) 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.