19 Heol Y Twyn, Pontlliw, Swansea, SA4 9EU
About 19 Heol Y Twyn
19 Heol Y Twyn is a semi-detached house in Pontlliw, Swansea, Swansea (SA4 9EU). It has a recorded floor area of 68 m² (around 732 sq ft), construction records dating it to 1967-1975 and council tax band C. The latest certificate (January 2021) shows an E (score 51), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since February 2011. Between certificates, roof efficiency went from Very Poor to Poor, window efficiency went from Average to Good and main heating went from Average to Good; while lighting dropped from Very Good to Good. The recommended improvements would lift it to B (score 86), a 3-band jump.
It lags the bulk of the postcode on energy efficiency (less efficient than 86% of similar EPCs). Across 1995–2022, sale prices on this property compounded at 5.2% per year. Today's modelled estimate of £165,000 is 13.8% above the 2022 sale price. On a £-per-square-foot basis, the last sale (£198/sq ft) was about 52.9% above the typical sold price in the postcode. Sold September 2022 for £145,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Certificate validity
Valid until 14 January 2031
Property Improvements
Changes detected from historical EPC data
Window efficiency improved
Roof insulation improved
Low energy lighting percentage decreased
Get a survey for this property
Level 2 HomeBuyer Report
We've checked 10 risk factors against the available data for this property and believe a Level 2 HomeBuyer Report could be a suitable option for you.
From £495 · Includes VAT
Planning history
19 Heol Y Twyn has no planning applications on record.
But the area is active
1 notable application nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
19 Heol Y Twyn has more than tripled in price since its earliest registered sale in 1995.
£165,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.2% per year over 27 years.
£145,000
Growth on file: 5.2% per year over 27 years.
Sales timeline
1 September 2022Most recent
£145,000
+297.3%over 27 years11 April 1995
£36,500
Median price across the last 5 sales in SA4 9EU: £164,000 (2026–2024).
Nearby sales in SA4 9EU
24 Heol Y Twyn, Pontlliw, Swansea, SA4 9EU
Sold Jan 2026
£165,00021 Heol Y Twyn, Pontlliw, Swansea, SA4 9EU
Sold Apr 2025
£128,00018 Heol Y Twyn, Pontlliw, Swansea, SA4 9EU
Sold Dec 2024
£165,00122 Heol Y Twyn, Pontlliw, Swansea, SA4 9EU
Sold Apr 2024
£164,00038 Heol Y Twyn, Pontlliw, Swansea, SA4 9EU
Sold Mar 2024
£136,000
Versus other Heol Y Twyn homes
On co₂ emissions, 19 Heol Y Twyn runs well behind the street norm.
Price per m²
£2,132
Street avg £1,740
Floor Area
68 m²
Street avg 71 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
4.5 t/year
Street avg 3.2 t/year
Similar properties nearby
1 Dillwyn Road, Penllergaer
SA4 9BT
1 Bryn Bach, Tircoed Forest Village, Penllergaer
SA4 9RX
1 Bron Afon, Tircoed Forest Village, Penllergaer
SA4 9QY
1 Clordir Road, Pontlliw
SA4 9EY
1 Clos Glanlliw, Pontlliw
SA4 9DW
1 Clos Llarwydden, Penllergaer
SA4 9ZP
1 Dryslwyn Close, Penllergaer
SA4 9AW
1 Cherry Crescent, Penllergaer
SA4 9FF
The neighbourhood at a glance
Crime
160/mo
Falling year-on-year across the wider district.
Nearest stop
0.1 km
Post Office — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







