19 Gwili Terrace, Mayhill, Swansea, SA1 6TW
About 19 Gwili Terrace
19 Gwili Terrace is an end-of-terrace house in Mayhill, Swansea, Swansea (SA1 6TW). It has a recorded floor area of 90 m² (around 969 sq ft), construction records dating it to 1930-1949 and council tax band A. The latest certificate (May 2019) shows a C (score 70). When first surveyed in August 2014 the rating was D, the property has climbed 1 band since. Between certificates, hot-water efficiency went from Average to Good and lighting went from Very Poor to Very Good; while wall efficiency dropped from Good to Average. The recommended improvements would push it to B (score 84).
Today's modelled estimate of £136,000 sits 63.9% above the 2019 sale of £83,000. At 90 m² it's 25% larger than the typical home in the postcode (72 m² median across 27 EPCs). Last sale on file: £83,000 in September 2019.
Energy performance
EPC Rating
Certificate validity
Valid until 27 May 2029
Property Improvements
Changes detected from historical EPC data
Hot water efficiency improved
More low energy lighting installed
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Planning history
19 Gwili 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
19 Gwili Terrace valuation sits well clear of the typical sold price in this postcode.
£136,000
Modelled from EPC, postcode comparables.
£83,000
Recorded with HM Land Registry.
Sales timeline
22 September 2019Most recent
£83,000
Median price across the last 5 sales in SA1 6TW: £120,000 (2025–2021).
Nearby sales in SA1 6TW
29 Gwili Terrace, Mayhill, Swansea, SA1 6TW
Sold Aug 2025
£135,00030 Gwili Terrace, Mayhill, Swansea, SA1 6TW
Sold Apr 2025
£125,00025 Gwili Terrace, Mayhill, Swansea, SA1 6TW
Sold Nov 2024
£120,0002 Gwili Terrace, Mayhill, Swansea, SA1 6TW
Sold Mar 2021
£105,00031 Gwili Terrace, Mayhill, Swansea, SA1 6TW
Sold Mar 2021
£98,000
Versus other Gwili Terrace homes
Floor Area for 19 Gwili Terrace runs comfortably ahead of the street norm.
Price per m²
£922
Street avg £1,101
Floor Area
90 m²
Street avg 76 m²
Habitable Rooms
5 rooms
Street avg 4 rooms
CO₂ Emissions
2.8 t/year
Street avg 3.5 t/year
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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
Gors Avenue — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







