Are you a property professional?Get qualified leads from motivated homeowners.
Get startedAre you a property professional?Get qualified leads from motivated homeowners.
Get started21 Caswell Street is a semi-detached house in Llanelli (SA15 1BS). It has a recorded floor area of 63 m² (around 678 sq ft), construction records dating it to 1900-1929 and council tax band C. The latest certificate (January 2015) shows a D (score 58), a step below the typical UK home. The rating has held steady at D across 2 certificates since May 2013. Between certificates, roof efficiency went from Average to Good; while lighting dropped from Very Good to Average. The recommended improvements would lift it to B (score 88), a 2-band jump. The latest certificate is from January 2015, so improvements made since then won't be reflected.
Sale prices here have outpaced England HPI: 3% per year against 0% for the wider region. Today's modelled estimate of £139,000 sits 90.4% above the 2015 sale of £73,000. On a £-per-square-foot basis, the last sale (£108/sq ft) was about 37.1% above the typical sold price in the postcode. At 63 m² it sits well below the postcode median (105 m² across 21 EPCs), making it one of the more compact homes locally. 11 years since the last transfer (June 2015).
Recommended upgrades on file would lift this property by multiple EPC bands.
This certificate is over 10 years old and is no longer valid.Expired 15 Jan 2025
21 Caswell Street valuation sits well clear of the typical sold price in this postcode.
£139,000
Modelled from EPC, postcode comparables and a sale-price growth of 3.0% per year over 8 years.
£73,000
Growth on file: 3.0% per year over 8 years.
Everything we know about this property, compiled into one in-depth, downloadable report.
Detailed AI analysis
21 Caswell Street is notably below the street on floor area.
Price per m²
£1,159
Street avg £973
Floor Area
63 m²
Street avg 113 m²
Habitable Rooms
3 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
Loft insulation upgraded to recommended levels
Low energy lighting percentage decreased
Are we missing something? Tell us about home improvements to help adjust your valuation.
5 June 2015Most recent
£73,000
+28.1%over 8 years19 January 2007
£57,000
Median price across the last 5 sales in SA15 1BS: £80,000 (2025–2018).
An AI-written breakdown of everything that matters
Detailed EPC data
Full energy ratings, history and recommendations
Related properties
Comparable homes and street-level pricing
Full planning history
Every application and decision on record
Ad-free · Instant access · Secure Stripe checkout · One-off payment
Street avg 6 rooms
CO₂ Emissions
3.9 t/year
Street avg 6.2 t/year