12 Dewi Terrace, Mayhill, Swansea, SA1 6RN
About 12 Dewi Terrace
12 Dewi Terrace is a semi-detached house in Mayhill, Swansea, Swansea (SA1 6RN). It has a recorded floor area of 70 m² (around 753 sq ft), construction records dating it to 1930-1949 and council tax band A. The latest certificate (March 2013) shows a D (score 67), on the cusp of jumping into the C band. When first surveyed in August 2009 the rating was E, the property has climbed 1 band since. Between certificates, wall efficiency went from Poor to Good, roof efficiency went from Average to Good and window efficiency went from Average to Good; while lighting dropped from Very Good to Very Poor. The recommended improvements would lift it to B (score 88), a 2-band jump. The latest certificate is from March 2013, so improvements made since then won't be reflected.
At 70 m² it's 22.1% larger than the typical home in the postcode (57 m² median across 11 EPCs).
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 18 Mar 2023
EPC Rating
Certificate validity
Expired on 18 March 2023
Property Improvements
Changes detected from historical EPC data
Window efficiency improved
Wall insulation improved
Roof insulation improved
Low energy lighting percentage decreased
Heating controls upgraded for better temperature management
Hot water system upgraded
Low energy lighting percentage decreased
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Planning history
12 Dewi Terrace has no planning applications on record.
But the area is active
61 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
12 Dewi Terrace has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£118,000
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.
Versus other Dewi Terrace homes
Floor Area for 12 Dewi Terrace runs comfortably ahead of the street norm.
EPC Rating
67 (D)
Street avg 65 (D)
Floor Area
70 m²
Street avg 59 m²
CO₂ Emissions
2.7 t/year
Street avg 2.7 t/year
Habitable Rooms
3 rooms
Street avg 4 rooms
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The neighbourhood at a glance
Crime
580/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Dewi Terrace — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







