31 Heol Gwys, Upper Cwmtwrch, Swansea, SA9 2XG
About 31 Heol Gwys
31 Heol Gwys is a detached house in Upper Cwmtwrch, Swansea, Swansea (SA9 2XG). It has a recorded floor area of 175 m² (around 1884 sq ft) and construction records dating it to 2012-2021. The latest certificate (January 2026) shows a C (score 73). When first surveyed in September 2017 the rating was F, the property has climbed 3 bands since. Between certificates, wall efficiency went from Very Poor to Good, roof efficiency went from Average to Good and window efficiency went from Poor to Good. Main heating runs on oil. This certificate was lodged in the last six months, so the rating reflects current condition.
At 175 m² the property is well over the postcode median (88 m² across 9 EPCs), placing it in the larger end of the local stock. On energy efficiency it sits in the top 10% of properties in this postcode. Today's modelled estimate of £267,000 sits 84.1% above the 2019 sale of £145,000. On a £-per-square-foot basis, the last sale (£77/sq ft) was about 109% above the typical sold price in the postcode. Last sale on file: £145,000 in July 2019.
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Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
31 Heol Gwys ranks among the most efficient homes in the postcode for energy use.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Hot water system upgraded
High performance glazing installed
Wall insulation upgraded
Roof insulation improved
Floor insulation added or improved
More low energy lighting installed
Planning history
31 Heol Gwys has no planning applications on record.
The full report still covers planning activity across the surrounding area.
Sales history & valuation
31 Heol Gwys valuation sits well clear of the typical sold price in this postcode.
£267,000
Modelled from EPC, postcode comparables.
£145,000
Recorded with HM Land Registry.
Sales timeline
3 July 2019Most recent
£145,000
Median price across the last 5 sales in SA9 2XG: £200,000 (2024–2003).
Nearby sales in SA9 2XG
5 Heol Gwys, Upper Cwmtwrch, Swansea, SA9 2XG
Sold Feb 2024
£275,00015 Heol Gwys, Upper Cwmtwrch, Swansea, SA9 2XG
Sold Jul 2022
£200,000Lower Brynmorgan Bridge, Brynmorgan Villa, Upper Cwmtwrch, Swansea, SA9 2XG
Sold Apr 2021
£385,0008 Heol Gwys, Upper Cwmtwrch, Swansea, SA9 2XG
Sold Nov 2011
£70,00021 Heol Gwys, Upper Cwmtwrch, Swansea, SA9 2XG
Sold Sept 2003
£79,950
Everything we know about 31 Heol Gwys, 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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Versus the street
EPC Rating for 31 Heol Gwys runs comfortably ahead of the street norm.
Price per m²
£829
Street avg £1,141
Floor Area
175 m²
Street avg 92 m²
Habitable Rooms
6 rooms
Street avg 5 rooms
CO₂ Emissions
5.7 t/year
Street avg 8.0 t/year
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The neighbourhood at a glance
Crime
6/mo
Steady year-on-year across the wider district.
Nearest stop
0.0 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.