35 Glantwrch, Ystalyfera, Swansea, SA9 2JN
About 35 Glantwrch
35 Glantwrch is a semi-detached house in Ystalyfera, Swansea, Swansea (SA9 2JN). It has a recorded floor area of 75 m² (around 807 sq ft), construction records dating it to 1950-1966 and council tax band A. The latest certificate (December 2020) shows an F (score 31), near the bottom of the EPC scale. When first surveyed in July 2020 the rating was G, the property has climbed 1 band since. Between certificates, wall efficiency went from Poor to Average, roof efficiency went from Poor to Very Good and window efficiency went from Very Poor to Average; while main heating dropped from Poor to Very Poor. The recommended improvements would lift it to D (score 55), a 2-band jump. Main heating runs on to be used only when there is no heating/hot.
On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Across 2020–2022, sale prices on this property compounded at 82.4% per year. Today's modelled estimate of £148,000 is 17.5% above the 2022 sale price. On a £-per-square-foot basis, the last sale (£156/sq ft) was about 68.7% above the typical sold price in the postcode. Sold January 2022 for £126,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Know exactly what you're buying at 35 Glantwrch
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
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Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
35 Glantwrch sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating system changed
Changed to a more efficient fuel source
Hot water system changed
Single glazing replaced with double or better glazing
Cavity wall insulation installed
Loft insulation upgraded to recommended levels
Planning history
35 Glantwrch has no planning applications on record.
The full report still covers planning activity across the surrounding area.
We flagged 1 thing worth checking at 35 Glantwrch
Independent checks surfaced things a buyer would want to understand before offering. The report explains each one in full, with the underlying data and what to ask.
- Recent ownership pattern worth a look
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Sales history & valuation
35 Glantwrch has more than doubled in price since the earliest registered sale in 2020.
£148,000
Modelled from EPC, postcode comparables and a sale-price growth of 82.4% per year over 1 year.
£126,000
Growth on file: 82.4% per year over 1 year.
Sales timeline
21 January 2022Most recent
£126,000
+127.0%over 1 year10 September 2020
£55,510
Median price across the last 5 sales in SA9 2JN: £123,000 (2024–2021).
Nearby sales in SA9 2JN
67 Glantwrch, Ystalyfera, Swansea, SA9 2JN
Sold Oct 2024
£84,50071 Glantwrch, Ystalyfera, Swansea, SA9 2JN
Sold Jun 2024
£162,00063 Glantwrch, Ystalyfera, Swansea, SA9 2JN
Sold Aug 2023
£123,00029 Glantwrch, Ystalyfera, Swansea, SA9 2JN
Sold Mar 2022
£110,0001 Glantwrch, Ystalyfera, Swansea, SA9 2JN
Sold Dec 2021
£142,250
Everything we know about 35 Glantwrch, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Recent ownership pattern worth a look

Versus other Glantwrch homes
On price per m², 35 Glantwrch stands well clear of the street.
Price per m²
£1,680
Street avg £1,196
Floor Area
75 m²
Street avg 78 m²
Habitable Rooms
3 rooms
Street avg 4 rooms
CO₂ Emissions
6.0 t/year
Street avg 3.6 t/year
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The neighbourhood at a glance
Crime
6/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Capital Buildings — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.