23 King William Street, Swindon, SN1 3LB
About 23 King William Street
23 King William Street is a three-bedroom end-of-terrace house in Swindon (SN1 3LB). It has a recorded floor area of 152 m² (around 1636 sq ft), construction records dating it to 1900-1929 and council tax band D. The latest certificate (October 2016) shows a D (score 64), on the cusp of jumping into the C band. The recommended improvements would lift it to B (score 84), a 2-band jump. Other recorded features include a basement and a loft.
At 152 m² the property is well over the postcode median (82 m² across 19 EPCs), placing it in the larger end of the local stock. Across 2006–2023, sale prices on this property compounded at 3.2% per year. On a £-per-square-foot basis, the last sale (£199/sq ft) was about 58% above the typical sold price in the postcode. Sold August 2023 for £325,000.
What this property has
Inside
- Bedrooms3
- Bathrooms1
- LoftYes
- BasementYes
Outside
- Private gardenYes
- ParkingYes
Everything you need to know about 23 King William Street
The true value, the hidden risks and the full sale history, in one report.
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Energy performance
23 King William Street's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919 and has solid (non-cavity) walls, we believe a Level 3 building survey should be considered.
From £955 · Includes VAT
Planning history
23 King William Street has no planning applications on record.
But the area is active
31 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
Latest sale on 23 King William Street was the highest on Land Registry record across the postcode.
£320,000
Modelled from EPC, postcode comparables and a sale-price growth of 3.2% per year over 17 years.
£325,000
Growth on file: 3.2% per year over 17 years.
Sales timeline
28 August 2023Most recent
£325,000
+18.2%over 6 years9 July 2017
£275,000
+44.7%over 10 years14 November 2006
£190,000
Median price across the last 5 sales in SN1 3LB: £217,000 (2025–2019).
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
£270,00018 King William Street, Swindon, SN1 3LB
Sold Nov 2022
£265,00011 King William Street, Swindon, SN1 3LB
Sold Nov 2021
£215,00025 King William Street, Swindon, SN1 3LB
Sold Aug 2019
£162,500
Versus other King William Street homes
23 King William Street outperforms the street on floor area by a wide margin.
Price per m²
£2,138
Street avg £1,976
Floor Area
152 m²
Street avg 86 m²
Habitable Rooms
7 rooms
Street avg 4 rooms
CO₂ Emissions
6.3 t/year
Street avg 4.2 t/year
Everything you need to know about 23 King William Street
The true value, the hidden risks and the full sale history, in one report.
Pick your report · every report is £14.99
One time fee only - money back guarantee

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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






