20 Westbury Street, Swansea, SA1 4JN
About 20 Westbury Street
20 Westbury Street is a semi-detached house in Swansea (SA1 4JN). It has a recorded floor area of 93 m² (around 1001 sq ft), construction records dating it to 1900-1929 and council tax band C. The latest certificate (December 2022) shows an E (score 52), well below the UK norm with real room to improve. The rating has held steady at E across 3 certificates since March 2013. Between certificates, roof efficiency went from Very Poor to Average and lighting went from Poor to Good; while window efficiency dropped from Good to Average. The recommended improvements would lift it to B (score 81), a 3-band jump.
It hasn't traded since March 2003, a hold of 23 years that's notably long for the area. Across 2001–2003, sale prices on this property compounded at 11.6% per year. Today's modelled estimate of £193,000 sits 221.7% above the 2003 sale of £60,000. On a £-per-square-foot basis, the last sale (£60/sq ft) was about 32.6% below the postcode norm. At 93 m² it's 24.7% smaller than the typical home in the postcode (124 m² median across 38 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 74% of similar EPCs).
Everything you need to know about 20 Westbury 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
Roof insulation improved
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919 and has been extended more than once, we believe a Level 3 building survey should be considered.
From £820 · Includes VAT
Planning history
20 Westbury Street has no planning applications on record.
But the area is active
44 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
20 Westbury Street's estimated value is more than triple its earliest registered sale price (2001).
£193,000
Modelled from EPC, postcode comparables and a sale-price growth of 11.6% per year over 2 years.
£60,000
Growth on file: 11.6% per year over 2 years.
Sales timeline
30 March 2003Most recent
£60,000
+20.0%over 1 year29 July 2001
£49,995
Median price across the last 5 sales in SA1 4JN: £190,000 (2025–2023).
Nearby sales in SA1 4JN
Versus other Westbury Street homes
On floor area, 20 Westbury Street runs well behind the street norm.
Price per m²
£645
Street avg £1,102
Floor Area
93 m²
Street avg 127 m²
Habitable Rooms
5 rooms
Street avg 6 rooms
CO₂ Emissions
5.3 t/year
Street avg 5.5 t/year
Everything you need to know about 20 Westbury 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
The data behind every report
Similar properties nearby
The neighbourhood at a glance
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
St James Church — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.