20 Y Llwyni, Llangyfelach, Swansea, SA6 6BL
About 20 Y Llwyni
20 Y Llwyni is a semi-detached house in Llangyfelach, Swansea, Swansea (SA6 6BL). It has a recorded floor area of 59 m² (around 635 sq ft), construction records dating it to 1991-1995 and council tax band B. The latest certificate (May 2026) shows a C (score 71). The rating has held steady at C across 2 certificates since April 2014. Between certificates, window efficiency dropped from Average to Poor. The recommended improvements would push it to B (score 86). This certificate was lodged in the last six months, so the rating reflects current condition.
Across 1996–2021, sale prices on this property compounded at 5.7% per year. Today's modelled estimate of £178,000 is 42.4% above the 2021 sale price. On a £-per-square-foot basis, the last sale (£197/sq ft) was about 33% above the typical sold price in the postcode. Last sale on file: £125,000 in October 2021. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Energy performance
20 Y Llwyni's carbon output is low for the local stock.
EPC Rating
Certificate validity
Valid until 11 May 2036
Property Improvements
Changes detected from historical EPC data
More low energy lighting installed
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Planning history
20 Y Llwyni has no planning applications on record.
But the area is active
5 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
20 Y Llwyni has more than quadrupled in price since its earliest registered sale in 1996.
£178,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.7% per year over 26 years.
£125,000
Growth on file: 5.7% per year over 26 years.
Sales timeline
13 October 2021Most recent
£125,000
+317.4%over 25 years26 January 1996
£29,950
Median price across the last 5 sales in SA6 6BL: £166,500 (2026–2022).
Nearby sales in SA6 6BL
3 Y Llwyni, Llangyfelach, Swansea, SA6 6BL
Sold Jan 2026
£150,00044 Y Llwyni, Llangyfelach, Swansea, SA6 6BL
Sold Jun 2025
£166,5005 Y Llwyni, Llangyfelach, Swansea, SA6 6BL
Sold Nov 2024
£235,00018 Y Llwyni, Llangyfelach, Swansea, SA6 6BL
Sold Jun 2022
£140,00036 Y Llwyni, Llangyfelach, Swansea, SA6 6BL
Sold Jun 2022
£244,000
Versus other Y Llwyni homes
CO₂ Emissions for 20 Y Llwyni runs comfortably ahead of the street norm.
Price per m²
£2,119
Street avg £2,150
Floor Area
59 m²
Street avg 57 m²
Habitable Rooms
3 rooms
Street avg 3 rooms
CO₂ Emissions
1.5 t/year
Street avg 2.2 t/year
Similar properties nearby
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The neighbourhood at a glance
Crime
210/mo
Falling year-on-year across the wider district.
Nearest stop
0.1 km
The Close — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







