3Y Avg Price
£343,542
6 sales
Properties
27
Sales / Year
2.2
5-year average
Avg £/sq ft
£246
£2,644/m²
Rank in SA18
20th
of 243 streets
Last Sale
£375,000
May 2026
Price History
Every recorded sale on this street, coloured by property type.
Last 10 Sales
46 total recorded
Y GARTH Heol Ddu
Detached
£375,000
May 2026
TY CARREG Heol Ddu
Detached
£175,625
Mar 2026
PANTYBRYN Heol Ddu
Detached
£175,625
Mar 2026
Y GARTH Heol Ddu
Detached
£350,000
May 2025
LLAIN ALAW Heol Ddu
Detached
£410,000
Jan 2025
MELLIONS Heol Ddu
Detached
£575,000
Sept 2024
MELLIONS Heol Ddu
Detached
£600,000
Mar 2023
CWMCLEDDAU COTTAGE Heol Ddu
Detached
£365,000
Nov 2022
HOLLY COTTAGE Heol Ddu
Detached
£450,000
Mar 2022
FFYNNON DDU Heol Ddu
Detached
£330,000
Dec 2021
Street Rankings — SA18
Streets ranked by 3-year average sale price. Showing positions 16–25 of 243.
| # | Street | 3Y Avg |
|---|---|---|
| 16 | Ffordd Y Deri | £363,500 |
| 17 | Parc Bwtrimawr | £355,833 |
| 18 | Llys Tirnant | £351,667 |
| 19 | Bryncethin Road | £351,250 |
| 20 | Heol Ddu | £343,542 |
| 21 | Maes Yr Helyg | £340,000 |
| 22 | Rhosfa Road | £333,333 |
| 23 | Wernddu Road | £332,625 |
| 24 | Pontamman Road | £330,000 |
| 25 | Golwg Y Mynydd | £325,000 |
Property Mix
Type
Tenure
EPC Ratings
20 of 27 properties have an EPC record
Avg floor area: 1,701 sq ft (158 m²)
District Context — SA18
SA18 covers the Ammanford and Betws areas in Carmarthenshire, south Wales, situated in the western valleys of the region. It is a rural and semi-rural locality with a character rooted in former mining heritage, now offering quieter residential appeal.
Average Property Price - SA18
£217,090
17
National percentile
12 month avg at 31 Aug 2026
Average Net Household Income - SA18
£32,696
17
National percentile
2023 census data
10-Year Annualised Price Growth - SA18
5.1%
94
National percentile
Estimate at 31 Aug 2026
10-Year Annualised Rent Growth - SA
3.9%
49
National percentile
Estimate at 31 Aug 2026