SG3 postcode area guide — East Hertfordshire
House prices, crime, broadband speeds, mobile signal, schools and demographics for the SG3 postcode district in East Hertfordshire — every official dataset on one page.
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Where is SG3?
Broadband & internet speeds in SG3
Strong coverage
Superfast (30Mb+)
95.7%
Ultrafast (300Mb+)
59.5%
Gigabit-capable
59.5%
Below USO (10Mb)
0.3%
Broadband availability in the SG3 postcode district (East Hertfordshire) is Strong — superfast is near-universal and gigabit is rolling out. Across the 201 postcodes Ofcom measures in SG3, superfast broadband (30 Mbit/s or faster) reaches 95.7% of premises and gigabit-capable lines are available to 59.5%.
Around 0.3% of premises in SG3 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 SG3
| Postcode | Superfast | Gigabit |
|---|---|---|
| SG3 6AA | 100% | 70% |
| SG3 6AB | 100% | 100% |
| SG3 6AD | 100% | 100% |
| SG3 6AE | 100% | 100% |
| SG3 6AF | 100% | 0% |
| SG3 6AG | 100% | 0% |
| SG3 6AH | 100% | 95.2% |
| SG3 6AJ | 100% | 100% |
| SG3 6AL | 100% | 100% |
| SG3 6AN | 100% | 89.5% |
Run a speed test to see what you're actually getting, or check your exact postcode.
Mobile signal around East Hertfordshire
Ofcom's coverage model for the wider East Hertfordshire district (71,670 premises):
4G indoors — all networks
87.2%
4G outdoors — all networks
98.8%
5G outdoors — all networks
27.7%
Voice indoors — all networks
90.2%
Signal varies street by street — use the mobile coverage checker to compare EE, O2, Three and Vodafone at an exact postcode.
Crime in SG3
Police recorded 24 incidents within about a mile of the centre of SG3 in May 2026 (latest published street-level data). The breakdown:
| Category | Incidents | Share |
|---|---|---|
| Violence & sexual offences | 11 | 45.8% |
| Anti-social behaviour | 5 | 20.8% |
| Public order | 3 | 12.5% |
| Vehicle crime | 3 | 12.5% |
| Burglary | 1 | 4.2% |
| Criminal damage & arson | 1 | 4.2% |
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 SG3
Based on 84 sales registered with HM Land Registry in the last 12 months, the median sold price in SG3 is £452,000, down 3.8% on the previous year (£470,000).
Detached
£800,000
21 sales
Semi-detached
£500,000
19 sales
Terraced
£395,000
23 sales
Flat / maisonette
£255,000
19 sales
Latest recorded sales in SG3
| Date | Price | Type | Street | Postcode |
|---|---|---|---|---|
| 15 May 2026 | £575,000 | Semi-detached | Brookbridge Lane | SG3 6SZ |
| 14 May 2026 | £280,000 | Flat | Constance Place | SG3 6EE |
| 14 May 2026 | £130,000 | Flat | Haygarth | SG3 6HE |
| 8 May 2026 | £485,000 | Semi-detached | Pondcroft Road | SG3 6DB |
| 8 May 2026 | £460,000 | Semi-detached | Nutcroft | SG3 6TG |
| 30 Apr 2026 | £342,500 | Terraced | Peters Way | SG3 6HP |
| 27 Apr 2026 | £615,000 | Detached | Wolves Mere | SG3 6JW |
| 24 Apr 2026 | £2,000 | Other | Carvers Croft | SG3 6LX |
| 2 Apr 2026 | £525,000 | Detached | Sayer Way | SG3 6BN |
| 31 Mar 2026 | £263,000 | Terraced | Orchard Way | SG3 6BU |
Contains HM Land Registry data © Crown copyright and database right 2026, licensed under the Open Government Licence v3.0.
Who lives here? East Hertfordshire demographics
Census 2021 figures for the wider East Hertfordshire district (150,155 residents, 62,023 households):
| Age profile | |
|---|---|
| Under 15 | 19.3% |
| 15–29 | 21.1% |
| 30–44 | 20.5% |
| 45–64 | 20.9% |
| 65+ | 18.2% |
| Housing tenure | |
|---|---|
| Owner-occupied | 69.4% |
| Private rented | 16.1% |
| Social rented | 11.4% |
Source: ONS Census 2021 (district level — the finest openly licensed cut we republish). © Crown copyright, OGL v3.0.
Schools in and around SG3
| School | Phase | Ages | Pupils | Postcode |
|---|---|---|---|---|
| Knebworth Primary and Nursery School | Primary | 3–11 | 390 | SG3 6AA |
| St Michael's Woolmer Green CofE VA Primary School | Primary | 4–11 | 186 | SG3 6JP |
| All Saints Church of England Voluntary Aided Primary School, Datchworth | Primary | 4–11 | 120 | SG3 6RE |
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 SG3
44 rated food businesses operate in SG3. 34 hold the top rating of 5, 5 are rated 4, and 1 are rated 2 or below.
Among the 5-rated: All Saints Church Of England School, Co-op, Coasters, Coltsfoot Country Retreat, Datchworth Sports Club.
Source: Food Standards Agency, food hygiene ratings (FHRS) open data.
Energy performance (EPC) in SG3
From a sample of 148 Energy Performance Certificates across 12 SG3 postcodes, the most common rating is band D (average band D). 45% of sampled homes are rated C or better.
Band B
16%
Band C
28%
Band D
43%
Band E
12%
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 East Hertfordshire
Landlines around SG3 typically use:
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What's it like living in SG3?
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Moving to SG3? Sort your connectivity first
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Postcodes in SG3
Neighbouring districts
All Stevenage (SG) postcode districts ›
Frequently asked questions
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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.