1 Derwen Fawr, Llandybie, Ammanford, SA18 2UY
About 1 Derwen Fawr
1 Derwen Fawr is a detached house in Llandybie, Ammanford, Ammanford (SA18 2UY). It has a recorded floor area of 77 m² (around 829 sq ft), construction records dating it to 1967-1975 and council tax band D. The latest certificate (November 2022) returns a B (score 83), comfortably above the UK average. When first surveyed in March 2012 the rating was D, the property has climbed 2 bands since. Between certificates, lighting went from Average to Good; while wall efficiency dropped from Good to Poor. The recommended improvements would push it to A (score 93).
On energy efficiency it sits in the top 10% of properties in this postcode.
Know exactly what you're buying at 1 Derwen Fawr
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
1 Derwen Fawr ranks among the most efficient homes in the postcode for energy use.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Roof insulation improved
Solar PV panels (40 kWp) installed
Planning history
1 Derwen Fawr has no planning applications on record.
Notable planning nearby
3applications of note in the surrounding area
We flagged 1 thing worth checking at 1 Derwen Fawr
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
30-day money-back guarantee
Sales history & valuation
1 Derwen Fawr has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£229,000
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 SA18 2UY: £206,000 (2024–2019).
Nearby sales in SA18 2UY
36 Derwen Fawr, Llandybie, Ammanford, SA18 2UY
Sold Nov 2024
£238,00010 Derwen Fawr, Llandybie, Ammanford, SA18 2UY
Sold Nov 2023
£205,0009 Derwen Fawr, Llandybie, Ammanford, SA18 2UY
Sold Aug 2023
£250,00017 Derwen Fawr, Llandybie, Ammanford, SA18 2UY
Sold Mar 2021
£206,00035 Derwen Fawr, Llandybie, Ammanford, SA18 2UY
Sold May 2019
£150,000
Everything we know about 1 Derwen Fawr, 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 Derwen Fawr homes
1 Derwen Fawr outperforms the street on epc rating by a wide margin.
EPC Rating
83 (B)
Street avg 63 (D)
Floor Area
77 m²
Street avg 94 m²
CO₂ Emissions
2.0 t/year
Street avg 4.3 t/year
Habitable Rooms
4 rooms
Street avg 5 rooms
Similar properties nearby
The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
5/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Glynhir Road — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.