20 Gelliderw, Pontardawe, Swansea, SA8 4NB
About 20 Gelliderw
20 Gelliderw is a three-bedroom semi-detached house in Pontardawe, Swansea, Swansea (SA8 4NB). It has a recorded floor area of 87 m² (around 933 sq ft), construction records dating it to 1950-1966 and council tax band B. The latest certificate (February 2012) shows a D (score 62), on the cusp of jumping into the C band. When first surveyed in December 2010 the rating was F, the property has climbed 2 bands since. Between certificates, roof efficiency went from Very Poor to Average, window efficiency went from Average to Good and hot-water efficiency went from Poor to Good. The recommended improvements would push it to C (score 71). The latest certificate is from February 2012, so improvements made since then won't be reflected. Other recorded features include outbuildings. Our model identifies extension potential, subject to local planning policy.
At 87 m² the property is well over the postcode median (62 m² across 39 EPCs), placing it in the larger end of the local stock. It lags the bulk of the postcode on energy efficiency (less efficient than 77% of similar EPCs). Most recent transfer: January 2021 at £120,000. Across the public record there are 5 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. Across 2007–2021, sale prices on this property compounded at 3.6% per year. Today's modelled estimate of £173,000 is 44.2% above the 2021 sale price. On a £-per-square-foot basis, the last sale (£129/sq ft) was about 50.8% above the typical sold price in the postcode.
What this property has
Inside
- Bedrooms3
- Bathrooms1
- Dining roomYes
Outside
- Private gardenYes
- DrivewayYes
- OutbuildingsYes
Building
- RefurbishedYes
- Extension potentialPossible
Energy performance
20 Gelliderw's EPC is over a decade old — improvements since won't be reflected.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 20 Feb 2022
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls changed
Hot water system upgraded
Window efficiency improved
Roof insulation improved
More low energy lighting installed
Get a survey for this property
Level 3 Building Survey
Because the property has permanent outbuildings, we believe a Level 3 building survey should be considered.
From £820 · Includes VAT
Planning history
20 Gelliderw has no planning applications on record.
But the area is active
2 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
20 Gelliderw has changed hands more often than typical for the area.
£173,000
Modelled from EPC, postcode comparables and a sale-price growth of 3.6% per year over 14 years.
£120,000
Growth on file: 3.6% per year over 14 years.
Sales timeline
15 January 2021Most recent
£120,000
+16.5%over 2 years13 September 2018
£103,000
+28.7%over 6 years25 April 2012
£80,000
-15.8%over 4 years11 March 2008
£95,000
+28.4%over 12 months12 March 2007
£74,000
Median price across the last 5 sales in SA8 4NB: £145,000 (2025–2023).
Nearby sales in SA8 4NB
33 Gelliderw, Pontardawe, Swansea, SA8 4NB
Sold Jul 2025
£145,0008 Gelliderw, Pontardawe, Swansea, SA8 4NB
Sold Oct 2024
£150,00018 Gelliderw, Pontardawe, Swansea, SA8 4NB
Sold Jun 2024
£150,00037 Gelliderw, Pontardawe, Swansea, SA8 4NB
Sold Jan 2024
£83,00019 Gelliderw, Pontardawe, Swansea, SA8 4NB
Sold Jun 2023
£102,000
Versus other Gelliderw homes
20 Gelliderw outperforms the street on years held by a wide margin.
Price per m²
£1,384
Street avg £1,326
Floor Area
87 m²
Street avg 81 m²
Habitable Rooms
5 rooms
Street avg 4 rooms
CO₂ Emissions
4.1 t/year
Street avg 3.4 t/year
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The neighbourhood at a glance
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Cefn Llan Stores — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







