23 Alltwen Hill, Pontardawe, Swansea, SA8 3AB
About 23 Alltwen Hill
23 Alltwen Hill is a semi-detached house in Pontardawe, Swansea, Swansea (SA8 3AB). It has a recorded floor area of 72 m² (around 775 sq ft), construction records dating it to 1900-1929 and council tax band C. The latest certificate (May 2021) shows a D (score 64), on the cusp of jumping into the C band. When first surveyed in September 2016 the rating was E, the property has climbed 1 band since. Between certificates, roof efficiency went from Average to Good and lighting went from Average to Very Good; while window efficiency dropped from Good to Average. The recommended improvements would lift it to B (score 87), a 2-band jump.
Across 1997–2021, sale prices on this property compounded at 3.5% per year. Today's modelled estimate of £155,000 sits 96.2% above the 2021 sale of £79,000. Most recent transfer: June 2021 at £79,000. Across the public record there are 4 sales, relatively high churn for a single property. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend. At 72 m² it's 22.3% smaller than the typical home in the postcode (93 m² median across 16 EPCs).
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Certificate validity
Valid until 6 May 2031
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
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
23 Alltwen Hill has no planning applications on record.
A planning report still maps activity across the surrounding area and reads this property's extension & conversion potential.
Sales history & valuation
23 Alltwen Hill has more than doubled in price since the earliest registered sale in 1997.
£155,000
Modelled from EPC, postcode comparables and a sale-price growth of 3.5% per year over 24 years.
£79,000
Growth on file: 3.5% per year over 24 years.
Sales timeline
13 June 2021Most recent
£79,000
+14.5%over 1 year11 March 2020
£69,000
-23.3%over 2 years12 February 2018
£89,950
+160.7%over 20 years1 April 1997
£34,500
Median price across the last 5 sales in SA8 3AB: £168,000 (2026–2022).
Nearby sales in SA8 3AB
38 Alltwen Hill, Pontardawe, Swansea, SA8 3AB
Sold Mar 2026
£168,00034 Alltwen Hill, Pontardawe, Swansea, SA8 3AB
Sold Jul 2025
£195,00041 Alltwen Hill, Pontardawe, Swansea, SA8 3AB
Sold Jan 2024
£123,000Mountain View, Alltwen Hill, Pontardawe, Swansea, SA8 3AB
Sold Sept 2023
£267,50017 Alltwen Hill, Pontardawe, Swansea, SA8 3AB
Sold Sept 2022
£115,000
Versus other Alltwen Hill homes
CO₂ Emissions for 23 Alltwen Hill runs comfortably ahead of the street norm.
Price per m²
£1,097
Street avg £1,406
Floor Area
72 m²
Street avg 112 m²
Habitable Rooms
4 rooms
Street avg 5 rooms
CO₂ Emissions
3.4 t/year
Street avg 6.3 t/year
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The neighbourhood at a glance
Crime
66/mo
Falling year-on-year across the wider district.
Nearest stop
0.1 km
Alltwen Hill — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







