4 Heol Callwen, Penycae, Swansea, SA9 1GR
About 4 Heol Callwen
4 Heol Callwen is a three-bedroom mid-terrace house in Penycae, Swansea, Swansea (SA9 1GR). It has a recorded floor area of 80 m² (around 861 sq ft), construction records dating it to 1967-1975 and council tax band B. The latest certificate (October 2025) shows a C (score 74). The recommended improvements would push it to B (score 82). Main heating runs on electricity.
On energy efficiency it sits in the top 10% of properties in this postcode. Across 2002–2016, sale prices on this property compounded at 5.5% per year. Today's modelled estimate of £154,000 sits 54% above the 2016 sale of £100,000. On the market in January 2016 and unlisted since — roughly 10 years. Across the public record there are 4 sales, relatively high churn for a single property. One historical planning record sits against the property in 2015.
Know exactly what you're buying at 4 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
What this property has
Inside
- Bedrooms3
Energy performance
4 Heol Callwen ranks among the most efficient homes in the postcode for energy use.
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 4 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
4 Heol Callwen has more than doubled in price since the earliest registered sale in 2002.
£154,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.5% per year over 14 years.
£100,000
Growth on file: 5.5% per year over 14 years.
Sales timeline
15 January 2016Most recent
£100,000
+6.4%over 10 years7 March 2005
£94,000
+51.6%over 1 year28 August 2003
£62,000
+29.2%over 1 year22 May 2002
£48,000
Median price across the last 5 sales in SA9 1GR: £160,000 (2022–2013).
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
£1,000Ty Gwyn, Heol Callwen, Penycae, Swansea, SA9 1GR
Sold Jun 2013
£210,000
Everything we know about 4 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
EPC Rating for 4 Heol Callwen runs comfortably ahead of the street norm.
Price per m²
£1,250
Street avg £1,394
Floor Area
80 m²
Street avg 88 m²
Habitable Rooms
4 rooms
Street avg 4 rooms
CO₂ Emissions
0.7 t/year
Street avg 6.3 t/year
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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.