20 Heol Y Dderwen, Llandysul, SA44 4RW
About 20 Heol Y Dderwen
20 Heol Y Dderwen is a three-bedroom semi-detached house in Llandysul (SA44 4RW). It has a recorded floor area of 93 m² (around 1001 sq ft), construction records dating it to 1930-1949 and council tax band C. The latest certificate (September 2012) shows a C (score 70). The recommended improvements would push it to B (score 85). Main heating runs on oil. The latest certificate is from September 2012, so improvements made since then won't be reflected.
At 93 m² it's 17.7% larger than the typical home in the postcode (79 m² median across 17 EPCs). On energy efficiency it sits in the top 10% of properties in this postcode. Across 1998–2018, sale prices on this property compounded at 4.1% per year. Today's modelled estimate of £176,000 sits 53% above the 2018 sale of £115,000. Sold December 2018 for £115,000. Across the public record there are 4 sales, relatively high churn for a single property. One planning record on file: an extension approved in 2016. Past consents include an extension, meaningful when judging how the property has evolved.
Know exactly what you're buying at 20 Heol Y Dderwen
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
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
20 Heol Y Dderwen ranks among the most efficient homes in the postcode for energy use.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 15 Sept 2022
EPC Rating
Planning history
20 Heol Y Dderwen has an approved rear extension on the planning record.
- Jul 2016ExtensionFullIn report
Extension: Rear of property
GROUND FLOOR AND FIRST FLOOR EXTENSIONS TO REAR
- Documents
- 11 docs on file
- Reference
- W/33981
What's in 20 Heol Y Dderwen, Llandysul, SA44 4RW's planning history?
Refusals, disputes and full decisions on this property and nearby, in the report.
Sales history & valuation
Sale price has at least doubled since 1998.
£176,000
Modelled from EPC, postcode comparables and a sale-price growth of 4.1% per year over 21 years.
£115,000
Growth on file: 4.1% per year over 21 years.
Sales timeline
14 December 2018Most recent
£115,000
+19.2%over 3 years11 June 2015
£96,500
+7.2%over 2 years21 December 2012
£90,000
+80.0%over 14 years30 April 1998
£50,000
Median price across the last 5 sales in SA44 4RW: £187,000 (2025–2022).
Nearby sales in SA44 4RW
7 Heol Y Dderwen, Llandysul, SA44 4RW
Sold Apr 2025
£180,00019 Heol Y Dderwen, Llandysul, SA44 4RW
Sold Sept 2024
£187,00017 Heol Y Dderwen, Llandysul, SA44 4RW
Sold Dec 2023
£205,00016 Heol Y Dderwen, Llandysul, SA44 4RW
Sold Nov 2023
£174,000Brynawel, Heol Y Dderwen, Llandysul, SA44 4RW
Sold Nov 2022
£270,000
Everything we know about 20 Heol Y Dderwen, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
- Am I paying too much?
- Is something wrong with it?
- Is the agent's story true?
- Will it hold its value?

Versus other Heol Y Dderwen homes
EPC Rating for 20 Heol Y Dderwen runs comfortably ahead of the street norm.
Price per m²
£1,237
Street avg £1,994
Floor Area
93 m²
Street avg 81 m²
Habitable Rooms
5 rooms
Street avg 4 rooms
CO₂ Emissions
3.7 t/year
Street avg 5.6 t/year
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1 Clifton Terrace
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The neighbourhood at a glance
Crime
4/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Tan y Bryn — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.