17 Cefn Helyg, Sketty, Swansea, SA2 9GY
About 17 Cefn Helyg
17 Cefn Helyg is a four-bedroom detached house in Sketty, Swansea, Swansea (SA2 9GY). It has a recorded floor area of 121 m² (around 1302 sq ft), construction records dating it to 1967-1975 and council tax band F. The latest certificate (January 2015) shows an E (score 46), well below the UK norm with real room to improve. The recommended improvements would lift it to A (score 99), a 4-band jump. The latest certificate is from January 2015, so improvements made since then won't be reflected. Other recorded features include a conservatory. The home occupies a cul-de-sac position.
On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. 3 planning records sit against the property, 2 approved, 0 refused. Past consents include an extension and a garage conversion, meaningful when judging how the property has evolved. Across 1997–2018, sale prices on this property compounded at 5.5% per year. Today's modelled estimate of £352,000 is 35.9% above the 2018 sale price. Sold September 2018 for £259,000.
What this property has
Inside
- Bedrooms4
- Bathrooms1
- Dining roomYes
- CloakroomYes
- EnsuiteYes
- ConservatoryYes
Outside
- Private gardenRear
- GarageSingle
- Cul-de-sacYes
Building
- Central heatingYes
Energy performance
17 Cefn Helyg sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 14 Jan 2025
EPC Rating
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Planning history
17 Cefn Helyg has an approved single-storey side extension on the planning record.
3 applications on record at 17 Cefn Helyg, Sketty, Swansea, SA2 9GY
- Jan 2004ExtensionFullOutcome in report
Extension: Single storey · Side of property
First floor side extension
- Reference
- 2003/2523
- More recent applications — locked
- Garage ConversionSept 2019Decision
- Garage ConversionAug 2019Decision
Unlock 17 Cefn Helyg, Sketty, Swansea, SA2 9GY's full planning history
You're seeing the shape of it. The report has the substance.
- Every decision — granted, refused or withdrawn (3 on record)
- All 3 applications on this property in full, plus 2 notable nearby
- The 12 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
17 Cefn Helyg has more than tripled in price since its earliest registered sale in 1997.
£352,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.5% per year over 21 years.
£259,000
Growth on file: 5.5% per year over 21 years.
Sales timeline
18 September 2018Most recent
£259,000
+17.7%over 6 years11 October 2011
£220,000
+165.1%over 14 years29 May 1997
£83,000
Median price across the last 5 sales in SA2 9GY: £310,000 (2025–2018).
Nearby sales in SA2 9GY
Versus other Cefn Helyg homes
17 Cefn Helyg is notably below the street on epc rating.
Price per m²
£2,140
Street avg £2,552
Floor Area
121 m²
Street avg 101 m²
Habitable Rooms
7 rooms
Street avg 6 rooms
CO₂ Emissions
7.6 t/year
Street avg 3.9 t/year
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The neighbourhood at a glance
Reported crime in the wider district is trending notably upward year-on-year.
Crime
6/mo
Rising year-on-year across the wider district.
Nearest stop
0.2 km
Llwyn Mawr Road — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







