18 Heol Tredeg, Upper Cwmtwrch, Swansea, SA9 2XD
About 18 Heol Tredeg
18 Heol Tredeg is a mid-terrace house in Upper Cwmtwrch, Swansea, Swansea (SA9 2XD). It has a recorded floor area of 54 m² (around 581 sq ft), construction records dating it to before 1900 and council tax band A. The latest certificate (September 2024) shows a G (score 10), near the bottom of the EPC scale. The recommended improvements would lift it to D (score 62), a 3-band jump. Main heating runs on dual fuel.
At 54 m² it sits well below the postcode median (102 m² across 17 EPCs), making it one of the more compact homes locally. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £121,000 sits 51.2% above the 2025 sale of £80,000. On a £-per-square-foot basis, the last sale (£138/sq ft) was about 31.5% above the typical sold price in the postcode. A recent sale: £80,000 in January 2025.
Know exactly what you're buying at 18 Heol Tredeg
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
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Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
18 Heol Tredeg sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
EPC Rating
Planning history
18 Heol Tredeg has no planning applications on record.
The full report still covers planning activity across the surrounding area.
Sales history & valuation
18 Heol Tredeg valuation sits well clear of the typical sold price in this postcode.
£121,000
Modelled from EPC, postcode comparables.
£80,000
Recorded with HM Land Registry.
Sales timeline
15 January 2025Most recent
£80,000
Median price across the last 5 sales in SA9 2XD: £177,500 (2024–2022).
Nearby sales in SA9 2XD
15 Heol Tredeg, Upper Cwmtwrch, Swansea, SA9 2XD
Sold Oct 2024
£198,00012 Heol Tredeg, Upper Cwmtwrch, Swansea, SA9 2XD
Sold Apr 2024
£407,00010 Heol Tredeg, Upper Cwmtwrch, Swansea, SA9 2XD
Sold Oct 2023
£177,50011 Heol Tredeg, Upper Cwmtwrch, Swansea, SA9 2XD
Sold Mar 2022
£162,0006 Heol Tredeg, Upper Cwmtwrch, Swansea, SA9 2XD
Sold Mar 2022
£160,000
Everything we know about 18 Heol Tredeg, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
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- Will it hold its value?

Versus other Heol Tredeg homes
18 Heol Tredeg is notably below the street on years held.
Price per m²
£1,481
Street avg £1,467
Floor Area
54 m²
Street avg 106 m²
Habitable Rooms
3 rooms
Street avg 5 rooms
CO₂ Emissions
11.0 t/year
Street avg 8.3 t/year
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1 Brodawel, Glyncynwal Road, Upper Cwmtwrch
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The neighbourhood at a glance
Crime
6/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
New Tredegar Arms — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.