SG3 Postcode Data
Property data for the SG3 postcode district covering East Hertfordshire. Sold prices, crime statistics, energy performance, and demographic insights, all from HM Land Registry, Police UK, and the EPC Register.
Quick answer
The average sale price in SG3 is £398,991 (median £285,000), based on 147 HM Land Registry transactions. Police UK recorded 24 crimes within a 1-mile radius in 2026-05.
Headline pricing in SG3 is above the UK national average (England & Wales average ~£290k as of 2025). Stock is dominated by detached properties (53 of the last 147 sales).
Avg sale price
£398,991
147 sales
Median price
£285,000
Crime incidents
24
2026-05
Avg EPC score
n/a
127 certs
Recent sold prices
Latest 30 property sales in the SG3 area, sourced from HM Land Registry Price Paid Data.
detached
£642,306
53 sales
flat-maisonette
£183,820
50 sales
terraced
£263,088
28 sales
semi-detached
£503,250
16 sales
| Date | Address | Type | Price |
|---|---|---|---|
| Sept 2025 | 89, KERR CLOSE, KNEBWORTH | flat-maisonette | £190,000 |
| Sept 2025 | 3, SWANGLEYS LANE, KNEBWORTH | detached | £575,000 |
| Aug 2025 | 56, KERR CLOSE, KNEBWORTH | terraced | £360,000 |
| Jul 2025 | 9, SWANGLEYS LANE, KNEBWORTH | detached | £1,265,000 |
| Jul 2025 | 41, KERR CLOSE, KNEBWORTH | flat-maisonette | £190,000 |
| Jun 2025 | 23, KERR CLOSE, KNEBWORTH | flat-maisonette | £210,000 |
| May 2025 | 83, KERR CLOSE, KNEBWORTH | flat-maisonette | £225,000 |
| May 2025 | 61, KERR CLOSE, KNEBWORTH | flat-maisonette | £220,250 |
| Oct 2024 | 1, OLD LANE, KNEBWORTH | semi-detached | £920,000 |
| Oct 2024 | 25, KERR CLOSE, KNEBWORTH | flat-maisonette | £252,500 |
| Aug 2024 | 47, KERR CLOSE, KNEBWORTH | flat-maisonette | £240,000 |
| Jul 2024 | 35, KERR CLOSE, KNEBWORTH | flat-maisonette | £250,000 |
| Apr 2024 | 19, WATTON ROAD, KNEBWORTH | detached | £717,000 |
| Feb 2024 | 18, KERR CLOSE, KNEBWORTH | semi-detached | £342,500 |
| Feb 2024 | 43, KERR CLOSE, KNEBWORTH | flat-maisonette | £205,000 |
Crime in SG3
24 reported crimes within a 1-mile radius of the postcode centroid in 2026-05, from Police UK data.
Violent Crime
11
Anti Social Behaviour
5
Public Order
3
Vehicle Crime
3
Burglary
1
Energy performance
Aggregate EPC stats from 127 recently-certified properties in the SG3 area.
Sample size
127
Rating distribution
A
0
B
2
C
49
D
62
E
11
F
1
G
2
Area information
- Local authority
- East Hertfordshire, North Hertfordshire, Welwyn Hatfield
- Country
- England
- Wards
- Aston, Datchworth & Walkern, Hertford Rural, Knebworth
- Constituency
- North East Hertfordshire
- Latitude
- 51.8603
- Longitude
- -0.1825
More for SG3
Typical property
What the typical SG3 property looks like
Area summary, buyer notes, researched facts
Sold prices tool
Full transaction history for SG3
HM Land Registry from 1995
Corporate freeholders
Companies registered in SG3
Live Companies House data + PSCs
EPC checker
Look up any SG3 address
Energy ratings + improvement options
Crime checker
Local breakdown for SG3
Police UK monthly data
Want a full property report?
Get an AI-powered report for any specific SG3 address. Valuation, flood risk, planning history, schools and more.
Get a Property ReportData sources & methodology
Sold prices: HM Land Registry Price Paid Data, the official UK government records updated monthly. Sample uses the 30 most recent registered transactions in the postcode area.
Crime: Police UK street-level crime data, covering a 1-mile radius from the SG3 postcode centroid for the most recent month available (typically 2 months behind). For Scottish postcodes we use Police Scotland recorded-crime counts published by the Scottish Government (2024-25), reported by council area.
EPC: opendatacommunities.org, the official Energy Performance Certificate register for England and Wales. Aggregate stats from up to 30 most recent certificates in the postcode. For Scottish postcodes we use Scottish EPC Register lodgements, aggregated to a council-level band distribution (Q2 2025 to Q1 2026). For Northern Ireland we use the NISRA Census 2021 EPC-band classification of every household, aggregated by council (Census 2021).
Area data: postcodes.io, open data from the Office for National Statistics.