10b, Caswell Street, Swansea, SA1 4HT
About 10b
10b is a two-bedroom semi-detached house in Swansea (SA1 4HT). It has a recorded floor area of 47 m² (around 506 sq ft), construction records dating it to 1900-1929 and council tax band B. The latest certificate (November 2023) shows a D (score 63), on the cusp of jumping into the C band. When first surveyed in July 2012 the rating was E, the property has climbed 1 band since. The recommended improvements would lift it to B (score 86), a 2-band jump.
It hasn't traded since August 2007, a hold of 19 years that's notably long for the area. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. At 47 m² it sits well below the postcode median (73 m² across 13 EPCs), making it one of the more compact homes locally. Across 1998–2007, sale prices on this property compounded at 14.3% per year. Today's modelled estimate of £148,000 is 19.4% above the 2007 sale price. On a £-per-square-foot basis, the last sale (£245/sq ft) was about 167.5% above the typical sold price in the postcode.
What this property has
Inside
- Bedrooms2
- Dining roomYes
Outside
- Private gardenYes
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Certificate validity
Valid until 22 November 2033
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Roof insulation improved
Heating controls upgraded for better temperature management
Window efficiency 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
10b 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 grown by over 3x since 1998.
£148,000
Modelled from EPC, postcode comparables and a sale-price growth of 14.3% per year over 9 years.
£124,000
Growth on file: 14.3% per year over 9 years.
Sales timeline
23 August 2007Most recent
£124,000
+134.0%over 4 years26 September 2002
£53,000
+45.2%over 4 years9 July 1998
£36,500
Median price across the last 5 sales in SA1 4HT: £160,000 (2026–2018).
Nearby sales in SA1 4HT
Versus other Caswell Street homes
On price per m², 10b stands well clear of the street.
Price per m²
£2,638
Street avg £1,217
Floor Area
47 m²
Street avg 76 m²
Habitable Rooms
4 rooms
Street avg 4 rooms
CO₂ Emissions
2.4 t/year
Street avg 3.1 t/year
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The neighbourhood at a glance
Crime
580/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
St George Hotel 2 — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







