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Get started20 Caswell Street is a three-bedroom semi-detached house in Llanelli (SA15 1BS). It has a recorded floor area of 153 m² (around 1647 sq ft), construction records dating it to 1900-1929 and council tax band C. The latest certificate (September 2019) shows a D (score 61), on the cusp of jumping into the C band. The rating has held steady at D across 3 certificates since October 2008. Between certificates, wall efficiency went from Very Poor to Poor, window efficiency went from Average to Good and lighting went from Very Poor to Good. The recommended improvements would lift it to B (score 82), a 2-band jump. Other recorded features include a basement.
Sale prices here have outpaced England HPI: 7.2% per year against 0% for the wider region. Today's modelled estimate of £168,000 sits 110% above the 2020 sale of £80,000. On a £-per-square-foot basis, the last sale (£49/sq ft) was about 42.7% below the postcode norm. At 153 m² the property is well over the postcode median (105 m² across 21 EPCs), placing it in the larger end of the local stock. Most recent transfer: February 2020 at £80,000.
20 Caswell Street's carbon output runs well above what efficient homes in the postcode produce.
20 Caswell Street has more than tripled in price since its earliest registered sale in 2001.
£168,000
Modelled from EPC, postcode comparables and a sale-price growth of 7.2% per year over 19 years.
£80,000
Growth on file: 7.2% per year over 19 years.
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On floor area, 20 Caswell Street stands well clear of the street.
Price per m²
£523
Street avg £1,009
Floor Area
153 m²
Street avg 109 m²
Habitable Rooms
5 rooms
Rail-style transport is unusually close for this postcode.
Crime
4/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Tyisha Road — bus stop.
Changes detected from historical EPC data
Heating controls changed
Heating controls upgraded for better temperature management
Window efficiency improved
Wall insulation improved
More low energy lighting installed
Are we missing something? Tell us about home improvements to help adjust your valuation.
14 February 2020Most recent
£80,000
+272.1%over 18 years30 March 2001
£21,500
Median price across the last 5 sales in SA15 1BS: £119,000 (2025–2017).
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Street avg 5 rooms
CO₂ Emissions
7.3 t/year
Street avg 6.0 t/year
SA15 1LP