21 Catherine Street, Swansea, SA1 4JT
About 21 Catherine Street
21 Catherine Street is a two-bedroom mid-terrace house in Swansea (SA1 4JT). It has a recorded floor area of 88 m² (around 947 sq ft), construction records dating it to 1900-1929 and council tax band C. The latest certificate (July 2021) shows a D (score 68), on the cusp of jumping into the C band. When first surveyed in June 2009 the rating was E, the property has climbed 1 band since. Between certificates, roof efficiency went from Poor to Good, window efficiency went from Poor to Average and hot-water efficiency went from Average to Good; while wall efficiency dropped from Average to Very Poor. The recommended improvements would lift it to B (score 87), a 2-band jump.
Across 2002–2015, sale prices on this property compounded at 5.5% per year. Today's modelled estimate of £169,000 sits 50.9% above the 2015 sale of £112,000. On a £-per-square-foot basis, the last sale (£118/sq ft) was about 21.3% above the typical sold price in the postcode. 11 years since the last transfer (November 2015).
What this property has
Inside
- Bedrooms2
- Bathrooms1
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls changed
Hot water efficiency improved
Windows upgraded, improving insulation
Roof insulation improved
More low energy lighting installed
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919, we believe a Level 3 building survey should be considered.
From £820 · Includes VAT
Planning history
21 Catherine 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
Sale price has at least doubled since 2002.
£169,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.5% per year over 13 years.
£112,000
Growth on file: 5.5% per year over 13 years.
Sales timeline
13 November 2015Most recent
£112,000
+8.7%over 5 years18 December 2009
£103,000
+87.3%over 7 years8 September 2002
£55,000
Median price across the last 5 sales in SA1 4JT: £155,000 (2025–2022).
Nearby sales in SA1 4JT
Versus other Catherine Street homes
Price per m²
£1,273
Street avg £1,483
Floor Area
88 m²
Street avg 85 m²
Habitable Rooms
5 rooms
Street avg 4 rooms
CO₂ Emissions
3.0 t/year
Street avg 3.6 t/year
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The neighbourhood at a glance
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
St Helens Road — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







