6 King William Street, Swindon, SN1 3LB
About 6 King William Street
6 King William Street is a two-bedroom mid-terrace house in Swindon (SN1 3LB). It has a recorded floor area of 65 m² (around 700 sq ft), construction records dating it to 1900-1929 and council tax band B. The latest certificate (December 2020) shows a D (score 68), on the cusp of jumping into the C band. When first surveyed in March 2014 the rating was F, the property has climbed 2 bands since. Between certificates, window efficiency went from Average to Good, hot-water efficiency went from Very Poor to Good and main heating went from Very Poor to Good; while roof efficiency dropped from Good to Average. The recommended improvements would lift it to B (score 86), a 2-band jump.
Today's modelled estimate of £205,000 sits 57.7% above the 2014 sale of £130,000. On a £-per-square-foot basis, the last sale (£186/sq ft) was about 47.7% above the typical sold price in the postcode. Last sold in May 2014, so it's been off the market for around 12 years. 2 planning records sit against the property, 1 approved, 1 refused. At 65 m² it's 21.7% smaller than the typical home in the postcode (83 m² median across 19 EPCs).
What this property has
Inside
- Bedrooms2
- Bathrooms1
Everything you need to know about 6 King William Street
The true value, the hidden risks and the full sale history, in one report.
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Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Upgraded to gas central heating
Connected to mains gas supply
Heating controls upgraded for better temperature management
Hot water system upgraded
Window efficiency improved
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919, has been extended more than once, and has solid (non-cavity) walls, we believe a Level 3 building survey should be considered.
From £885 · Includes VAT
Planning history
2 applications on record at 6 King William Street, Swindon, SN1 3LB
- Mar 2015New BuildFullOutcome in report
Erection of 3no. garages with 1no. flat above.
- Documents
- 18 docs on file
- Reference
- S/14/2179
- More recent applications — locked
- OutbuildingDec 2016Decision
Unlock 6 King William Street, Swindon, SN1 3LB's full planning history
You're seeing the shape of it. The report has the substance.
- Every decision — granted, refused or withdrawn (2 on record)
- All 2 applications on this property in full, plus 31 notable nearby
- The 35 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
6 King William Street valuation sits well clear of the typical sold price in this postcode.
£205,000
Modelled from EPC, postcode comparables.
£130,000
Recorded with HM Land Registry.
Sales timeline
27 May 2014Most recent
£130,000
Median price across the last 5 sales in SN1 3LB: £265,000 (2025–2021).
Nearby sales in SN1 3LB
1 King William Street, Swindon, SN1 3LB
Sold Sept 2025
£217,00026 King William Street, Swindon, SN1 3LB
Sold Oct 2023
£270,00023 King William Street, Swindon, SN1 3LB
Sold Aug 2023
£325,00018 King William Street, Swindon, SN1 3LB
Sold Nov 2022
£265,00011 King William Street, Swindon, SN1 3LB
Sold Nov 2021
£215,000
Versus other King William Street homes
6 King William Street is notably below the street on floor area.
Price per m²
£2,000
Street avg £1,984
Floor Area
65 m²
Street avg 90 m²
Habitable Rooms
4 rooms
Street avg 5 rooms
CO₂ Emissions
2.8 t/year
Street avg 4.4 t/year
Everything you need to know about 6 King William Street
The true value, the hidden risks and the full sale history, in one report.
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Similar properties nearby
The neighbourhood at a glance
Reported crime in the wider district is trending notably upward year-on-year.
Crime
7/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
Avenue Road — bus stop.
Closest school
0.0 km
King William Street Church of England Primary School. 28 schools nearby.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode

Daytime· 07:00 – 23:00
52.0dB

Night-time· 23:00 – 07:00
41.6dB






