Our Data Sources
12, Allt Ioan, Carmarthen has 41 entries in the Land Registry , most recently in September 2010 and a single entry in the EPC database dated February 2026.
We combine this information with that of neighbouring properties to estimate the property attributes and values.
The local information is scored as 5 out of 5 and is considered of high accuracy.
Price Range & Condition
In very good condition, we estimate 12, Allt Ioan, Carmarthen would be worth £249,525, with a potential rental value of £1,280 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £221,008, with a rental value of £1,133 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Plot Size
12, Allt Ioan, Carmarthen occupies a 279 m2 plot as recorded by HM Land Registry.
Of the 43 other houses in this postcode, 39 have recorded plot sizes, and this one ranks as the 16th largest.
Energy Efficiency
12, Allt Ioan, Carmarthen has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 26 Feb 2026.
The property is connected to mains gas and has fully double glazed windows. It is heated using Boiler and radiators, mains gas.
Sold Prices
12, Allt Ioan, Carmarthen last changed hands on 22nd September 2010, selling for £150,000. The transaction was logged as a freehold house by HM Land Registry.
In total it has sold 4 times since 1995.
The market for similar properties has risen by 48.1% since September 2010.
- Sold Sep 2010£150,000
- Sold Jun 2010£150,000
- Sold May 2000£65,000
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 148 sales of comparable properties within 1.3 kilometres of 12, Allt Ioan, Carmarthen across the last 2 years.
Most recently, 48, Allt Ioan, Carmarthen, SA31 3SB, a freehold house, sold at £230,000 on the 30th April 2026.
Read more about house prices in SA31.
- Sold Apr 2026£230,000 | 3 Bed House48, Allt Ioan, Carmarthen, SA31 3SB48, Allt Ioan, Carmarthen, SA31 3SB
- Sold Jan 2026£207,500 | 3 Bed House1, Parc Yr Odyn, Carmarthen, SA31 3SE1, Parc Yr Odyn, Carmarthen, SA31 3SE
- Sold Nov 2025£222,000 | 3 Bed House51, Allt Ioan, Carmarthen, SA31 3SB51, Allt Ioan, Carmarthen, SA31 3SB
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
More reading links
Location Comparison
Our analysis of the public data ranks 12, Allt Ioan, Carmarthen as the 30th largest and the 29th most expensive of the 43 addresses on Allt Ioan, Johnstown, Carmarthen, SA31.
Against the SA31 postcode district average, it is £8k less expensive than the typical property.
More reading links
Schools Nearby
Public Transport Nearby
- Carmarthen|2.4 km away
- Ferryside|9.4 km away
- Kidwelly|13.1 km away
Available Internet Speeds
Ofcom's latest figures show superfast broadband available in this area.
According to recent data from Ofcom, Superfast Broadband is available in the area.
Risk of Flooding
Environment Agency data suggests this area has a Very Low risk of flooding.
