18b, Gwilym Road, Cwmllynfell, Swansea, SA9 2GH
About 18b
18b is a semi-detached house in Cwmllynfell, Swansea, Swansea (SA9 2GH). It has a recorded floor area of 63 m² (around 678 sq ft), construction records dating it to 1900-1929 and council tax band A. The latest certificate (May 2025) shows an E (score 51), well below the UK norm with real room to improve. The rating has held steady at E across 3 certificates since March 2023. Between certificates, hot-water efficiency went from Very Poor to Average and main heating went from Very Poor to Average; while wall efficiency dropped from Poor to Very Poor and window efficiency dropped from Good to Average. The recommended improvements would push it to D (score 66). Main heating runs on electricity. At 63 m² this is the 3rd smallest of 22 units on EPC record in the building, where floor areas span 58–171 m². The building's EPC ratings span G to D across 22 units on file.
At 63 m² it sits well below the postcode median (95 m² across 21 EPCs), making it one of the more compact homes locally.
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Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
18b's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Upgraded to gas central heating
Hot water system upgraded
Heating system changed
Hot water system changed
Planning history
18b has no planning applications on record.
The full report still covers planning activity across the surrounding area.
Sales history & valuation
18b has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£119,000
Modelled from EPC, postcode comparables.
No sales recorded with HM Land Registry
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
Median price across the last 5 sales in SA9 2GH: £240,000 (2024–2022).
Nearby sales in SA9 2GH
19 Gwilym Road, Cwmllynfell, Swansea, SA9 2GH
Sold Dec 2024
£270,00033 Gwilym Road, Cwmllynfell, Swansea, SA9 2GH
Sold Oct 2024
£278,00022 Gwilym Road, Cwmllynfell, Swansea, SA9 2GH
Sold Nov 2022
£10,00017 Gwilym Road, Cwmllynfell, Swansea, SA9 2GH
Sold Feb 2022
£240,00025 Gwilym Road, Cwmllynfell, Swansea, SA9 2GH
Sold Feb 2022
£99,995
Everything we know about 18b, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
- Am I paying too much?
- Is something wrong with it?
- Is the agent's story true?
- Will it hold its value?

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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
Cwmllynfell Chapel — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.