12 Glan Y Mor, Llansteffan, Carmarthen, SA33 5LL
About 12 Glan Y Mor
12 Glan Y Mor is a semi-detached house in Llansteffan, Carmarthen, Carmarthen (SA33 5LL). It has a recorded floor area of 96 m² (around 1033 sq ft), construction records dating it to 1950-1966 and council tax band C. The latest certificate (January 2016) shows an E (score 48), well below the UK norm with real room to improve. When first surveyed in December 2015 the rating was G, the property has climbed 2 bands since. Between certificates, roof efficiency went from Very Poor to Poor, hot-water efficiency went from Very Poor to Average and main heating went from Poor to Average. The recommended improvements would lift it to C (score 78), a 2-band jump. Main heating runs on oil. The latest certificate is from January 2016, so improvements made since then won't be reflected.
Untraded for 19 years, with the last transfer in July 2007. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Across 2002–2007, sale prices on this property compounded at 8.5% per year. Today's modelled estimate of £224,000 sits 72.3% above the 2007 sale of £130,000. On a £-per-square-foot basis, the last sale (£126/sq ft) was about 25.3% below the postcode norm.
Know exactly what you're buying at 12 Glan Y Mor
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
12 Glan Y Mor's carbon output runs well above what efficient homes in the postcode produce.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 13 Jan 2026
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Hot water system upgraded
Roof insulation improved
Planning history
12 Glan Y Mor has no planning applications on record.
Notable planning nearby
4applications of note in the surrounding area
We flagged 1 thing worth checking at 12 Glan Y Mor
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
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Sales history & valuation
The latest sale landed at the peak of the pre-credit-crunch market — a high-water reference point.
£224,000
Modelled from EPC, postcode comparables and a sale-price growth of 8.5% per year over 5 years.
£130,000
Growth on file: 8.5% per year over 5 years.
Sales timeline
1 July 2007Most recent
£130,000
+54.0%over 5 years18 March 2002
£84,399
Median price across the last 5 sales in SA33 5LL: £190,000 (2024–2015).
Nearby sales in SA33 5LL
16 Glan Y Mor, Llansteffan, Carmarthen, SA33 5LL
Sold Jun 2024
£262,00020 Glan Y Mor, Llansteffan, Carmarthen, SA33 5LL
Sold Sept 2022
£200,0007 Glan Y Mor, Llansteffan, Carmarthen, SA33 5LL
Sold Nov 2020
£190,00018 Glan Y Mor, Llansteffan, Carmarthen, SA33 5LL
Sold Sept 2015
£130,00013 Glan Y Mor, Llansteffan, Carmarthen, SA33 5LL
Sold Aug 2014
£170,000
Everything we know about 12 Glan Y Mor, 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 Glan Y Mor homes
12 Glan Y Mor outperforms the street on years held by a wide margin.
Price per m²
£1,354
Street avg £1,858
Floor Area
96 m²
Street avg 97 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
6.6 t/year
Street avg 6.4 t/year
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1 Coedmor Avenue, Llangain
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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
Llanstephan Bridge — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.