Property market
The five-year median is £2,850,000 from 3 recorded sales in SN3 4TN. This is a recorded-sale statistic, not a current valuation.
The latest UK House Price Index average for Swindon is £265,666 in June 2026, up 4.4% year on year.
SN3 4TN
South Marston · Swindon · England
Updated September 2026
Compare this postcodeLocation overview
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- Post town
- Swindon
- Ward
- South Marston
- Local authority
- Swindon
- Constituency
- Swindon North
- Postcode district
- SN3
- Postcode sector
- SN3 4
Nearby postcodes
Complete postcode fields and official codes
- Postcode
- SN3 4TN
- Status
- Current
- Introduced
- 1 July 1995
- Terminated
- Not published
- Postcode area
- SN
- Postcode district
- SN3
- Postcode sector
- SN3 4
- Latitude
- 51.597478
- Longitude
- -1.731729
- British National Grid easting
- 418,678
- British National Grid northing
- 188,771
Statistical and administrative geographies
- Country
- England · E92000001
- Region
- South West · E12000009
- Local authority district
- Swindon · E06000030
- Electoral ward
- South Marston · E05016299
- Parish or community
- E04012669
- Westminster constituency
- Swindon North · E14001536
- Output area
- E00078253
- Lower layer super output area
- Swindon 008A · E01015473
- Middle layer super output area
- Swindon 008 · E02003219
Postcode source versions
- Ordnance Survey: Code-Point Open Version 2026-08 · Current postcode units in Great Britain · OGL-3.0
- Office for National Statistics: ONS Postcode Directory Version 2026-08 · United Kingdom; Northern Ireland excluded pending rights review; Crown Dependencies outside product scope · OGL-3.0 with third-party rights
- Ordnance Survey: Boundary-Line Version 2026-05 · Local-authority boundaries in Great Britain · OS OpenData Licence
Explore SN3
Property
5 recorded
sales at this postcode
| Address | Date | Price |
|---|---|---|
| Site 10b, Phase 1, Viscount Way, South Marston Industrial Estate, Swindon, SN3 4TN | 7 March 2025 | £6,722,500 |
| Stirling House, Viscount Way, South Marston Industrial Estate, Swindon, SN3 4TN | 22 May 2023 | £2,850,000 |
| Stirling House, Viscount Way, South Marston Industrial Estate, Swindon, SN3 4TN | 1 April 2022 | £1,625,000 |
Schools
Within 3.1 miles of this postcode
- Open schools
- 41
- Primary
- 28
- Secondary
- 4
- 1.1 km
South Marston Church of England Primary School
Academy converter
- 1.6 km
Maranatha Christian School
Other independent school
- 1.8 km
Grange Infants' School
Academy converter
Recorded crime
Within 1 mile of this postcode
- Published events
- 115
- Months covered
- 12
- Latest month
- June 2026
Most recorded categories in this period
- Violence and sexual offences 52
- Anti social behaviour 14
- Other theft 10
- Vehicle crime 9
- Public order 8
Census 2021
Population and age profile
- Postcode residents
- Not supplied
- Postcode households
- Not supplied
- Residents per household
- Not available
- SN3 4 residents
- 13,036
Age bands in SN3 4
Wider postcode sector- Age 0 to 14
- 15.2%
- Age 15 to 24
- 10%
- Age 25 to 44
- 23.5%
- Age 45 to 64
- 29%
- Age 65 and over
- 22.3%
1,972 residents
1,299 residents
3,054 residents
3,774 residents
2,898 residents
Small counts are adjusted for privacy, so totals can differ slightly between Census tables.
Census Day: 21 March 2021. Sources: ONS/Nomis P001-P004 and ONS CT21_0228. Age table version 2024-04-08.
Fixed broadband coverage
Ofcom's predicted availability across all residential and commercial premises in this postcode in January 2026.
- Superfast, 30 Mbit/s+
- 71.4%
- Ultrafast, 100 Mbit/s+
- 71.4%
- Ultrafast, 300 Mbit/s+
- 71.4%
- Gigabit-capable
- 71.4%
- Unable to receive decent fixed or FWA broadband
- 0%
- Next Generation Access
- 71.4%
- Decent broadband available from fixed wireless
- 0%
Predicted coverage, not measured speeds. Check availability for your address with a provider. Postcode-level full-fibre figures are not published in this release.
Source: Ofcom Connected Nations Spring 2026, version 2026-01-v2. Contains Ofcom data licensed under the Open Government Licence v3.0.
GP practices
6
within 5 km
MERCHISTON SURGERY
HIGHWORTH ROAD, STRATTON ST MARGARET, SWINDON, SN3 4BF
ODS code J83001
1.6 km
HAWTHORN MEDICAL CENTRE
MAY CLOSE, CRICKLADE ROAD, SWINDON, SN2 1UU
ODS code J83027
4.0 km
WESTROP MEDICAL PRACTICE
NEWBURGH PLACE, HIGHWORTH, SWINDON, SN6 7DN
ODS code J83002
4.2 km
ABBEY MEADS MEDICAL PRACT
ABBEYMEADS VILLAGE CENTRE, ELSTREE WAY, SWINDON, SN25 4YZ
ODS code J83035
4.3 km
ELDENE SURGERY
COLINGSMEAD, ELDENE, SWINDON, SN3 3TQ
ODS code J83047
4.6 km
KINGSWOOD SURGERY
KINGSWOOD AVENUE, PARK NORTH, SWINDON, SN3 2RJ
ODS code J83038
4.8 km
Main GP practices only; branch surgeries are excluded. Distances are straight-line. Contact the practice to check registration, services, opening hours and appointments.
Source acquired on 2026-09-05. Contains information from NHS England, licenced under the current version of the Open Government Licence.
Nearby transport
- 0.2 miles
Sunleys
BCT · South Marston
- 0.2 miles
Sunleys
BCT · South Marston
- 0.2 miles
Lancaster Place
BCT · Sth Marston Ind Est
- 0.2 miles
Lancaster Place
BCT · Sth Marston Ind Est
- 0.2 miles
Viscount Way
BCT · Sth Marston Ind Est
Relative deprivation
English Indices of Deprivation 2025 for Swindon 008A, the published LSOA linked to this postcode. Decile 1 contains the most deprived 10% of English LSOAs and decile 10 the least deprived 10%.
Overall IMD decile
7 of 10
Overall England rank
23,393 of 33,755
- Income
- 7 of 10
- Employment
- 7 of 10
- Education and skills
- 6 of 10
- Health and disability
- 8 of 10
- Crime
- 10 of 10
- Housing and services
- 2 of 10
- Living environment
- 9 of 10
These are relative area statistics, not measures of an individual household, affluence or absolute change. They cannot be compared with indices for other UK nations. Source: English Indices of Deprivation 2025, version 2025-v2.
Flood risk
Environment Agency long-term indicators for the area around addresses in this postcode. They are not an assessment of any individual property and do not show current or forecast flooding.
- High risk addresses
- 0
- Medium risk addresses
- 0
- Low risk addresses
- 0
- Groundwater flood alert area
- Unlikely
Source: Environment Agency flood-risk postcode search tool data, version 2026-06-18. Check the long-term risk for an individual area. © Environment Agency copyright and/or database right 2025. All rights reserved.
Evidence in context
Schools
41 open schools are in scope, including 28 primary and 4 secondary schools. South Marston Church of England Primary School is the nearest published school at 0.7 miles.
Counts describe active establishment records. They do not assess admissions, catchments or quality.
Recorded crime
115 published events cover 12 months, averaging 9.583 events per published month. The largest recorded category is Violence and sexual offences with 52 events.
The source publishes anonymised street-level events. These figures are not a measure of safety for an individual address.