12 Heol Callwen, Penycae, Swansea, SA9 1GR
About 12 Heol Callwen
12 Heol Callwen is a semi-detached house in Penycae, Swansea, Swansea (SA9 1GR). It has a recorded floor area of 55 m² (around 589 sq ft), construction records dating it to 1967-1975 and council tax band B. The latest certificate (February 2011) shows an E (score 54), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 71), a 2-band jump. Main heating runs on oil. The latest certificate is from February 2011, so improvements made since then won't be reflected.
At 55 m² it sits well below the postcode median (82 m² across 9 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 78% of similar EPCs). One historical planning record sits against the property in 2015.
Know exactly what you're buying at 12 Heol Callwen
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
Launch offer · save £5
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
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This certificate is over 10 years old and is no longer valid.Expired 08 Feb 2021
EPC Rating
Planning history
- Mar 2015OutbuildingFullIn report
Erection of hay, tractor and tool storage shed
- Agent
- AEDES
- Documents
- 23 docs on file
- Reference
- 15/11781/FUL
We flagged 1 thing worth checking at 12 Heol Callwen
Independent checks surfaced things a buyer would want to understand before offering. The report explains each one in full, with the underlying data and what to ask.
- Larger development activity nearby
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Sales history & valuation
12 Heol Callwen has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£146,000
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.
Median price across the last 5 sales in SA9 1GR: £150,000 (2022–2016).
Nearby sales in SA9 1GR
3 Heol Callwen, Penycae, Swansea, SA9 1GR
Sold Nov 2022
£165,0008 Heol Callwen, Penycae, Swansea, SA9 1GR
Sold Sept 2022
£160,0007 Heol Callwen, Penycae, Swansea, SA9 1GR
Sold May 2018
£150,000Ty Carreg, Heol Callwen, Penycae, Swansea, SA9 1GR
Sold Jun 2017
£1,0004 Heol Callwen, Penycae, Swansea, SA9 1GR
Sold Jan 2016
£100,000
Everything we know about 12 Heol Callwen, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Larger development activity nearby

Versus other Heol Callwen homes
Floor Area for 12 Heol Callwen lags the street by a wide margin.
EPC Rating
54 (E)
Street avg 57 (D)
Floor Area
55 m²
Street avg 91 m²
CO₂ Emissions
4.5 t/year
Street avg 5.9 t/year
Habitable Rooms
3 rooms
Street avg 5 rooms
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The neighbourhood at a glance
Crime
6/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Field Study Centre — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.