3Y Avg Price
£350,000
3 sales
Properties
22
Sales / Year
1.4
5-year average
Avg £/sq ft
£171
£1,839/m²
Rank in SA15
23rd
of 337 streets
Last Sale
£430,000
Aug 2026
Price History
Every recorded sale on this street, coloured by property type.
Last 10 Sales
32 total recorded
17 Heol Ddu
Detached
£430,000
Aug 2026
CLOSTEG Heol Ddu
Detached
£230,000
Jun 2025
16 Heol Ddu
Detached
£390,000
Feb 2025
GWELFOR Heol Ddu
Detached
£480,000
Feb 2023
15A Heol Ddu
Detached
£557,589
Dec 2022
GRAIGOG Heol Ddu
Detached
£105,000
Nov 2022
21 Heol Ddu
Detached
£400,000
Oct 2022
PENRHIW COTTAGE Heol Ddu
Detached
£150,000
Sept 2018
AEL Y BRYN Heol Ddu
Semi-Detached
£39,950
Dec 2017
TYNEWYDD Heol Ddu
Semi-Detached
£164,950
Mar 2016
Street Rankings — SA15
Streets ranked by 3-year average sale price. Showing positions 19–28 of 337.
| # | Street | 3Y Avg |
|---|---|---|
| 19 | St Margarets Drive | £380,000 |
| 20 | Clos Clement | £373,750 |
| 21 | Cae Delyn Close | £370,000 |
| 22 | Old Road | £362,357 |
| 23 | Heol Ddu | £350,000 |
| 24 | Bwlchygwynt | £340,536 |
| 25 | Roland Avenue | £335,000 |
| 26 | Herberdeg Road | £320,000 |
| 27 | Harries Avenue | £314,250 |
| 28 | Y Llwyn | £305,000 |
Property Mix
Type
Tenure
EPC Ratings
3 of 22 properties have an EPC record
Avg floor area: 1,033 sq ft (96 m²)
District Context — SA15
SA15 covers the Llanelli area and its surrounding villages in Carmarthenshire, south Wales. It is a long-established community with a mixed residential and industrial heritage, offering affordable living with good local amenities and transport links.
Average Property Price - SA15
£195,120
11
National percentile
12 month avg at 31 Jul 2026
Average Net Household Income - SA15
£32,850
18
National percentile
2023 census data
10-Year Annualised Price Growth - SA15
4.1%
82
National percentile
Estimate at 31 Jul 2026
10-Year Annualised Rent Growth - SA
3.9%
49
National percentile
Estimate at 31 Jul 2026