12 Carmarthen Street, Llandeilo, SA19 6AE
About 12 Carmarthen Street
12 Carmarthen Street is a one-bedroom semi-detached house in Llandeilo (SA19 6AE). It has a recorded floor area of 74 m² (around 797 sq ft), construction records dating it to before 1900 and council tax band A. At 74 m² this is the 10th smallest of 18 units on EPC record in the building, where floor areas span 28–244 m². The building's EPC ratings span E to C across 18 units on file. Other recorded features include a basement. The latest certificate (April 2015) shows a D (score 66), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 75). The latest certificate is from April 2015, so improvements made since then won't be reflected.
Today's modelled estimate of £103,000 sits 119.1% above the 2017 sale of £47,000. On a £-per-square-foot basis, the last sale (£59/sq ft) was about 51.8% below the postcode norm. Last sold in September 2017, so it's been off the market for around 9 years. 1 bedrooms is on the smaller side for this postcode, where 3 is the typical count.
Know exactly what you're buying at 12 Carmarthen Street
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
What this property has
Inside
- Bedrooms1
- Bathrooms1
- Open-plan layoutYes
- Dining roomYes
- BasementYes
- FireplaceYes
Building
- Heating systemgas_fired
Energy performance
12 Carmarthen Street's EPC is over a decade old — improvements since won't be reflected.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 19 Apr 2025
EPC Rating
Planning history
12 Carmarthen Street has no planning applications on record.
Notable planning nearby
4applications of note in the surrounding area
We flagged 1 thing worth checking at 12 Carmarthen Street
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
£103,000
Modelled from EPC, postcode comparables.
£47,000
Recorded with HM Land Registry.
Sales timeline
21 September 2017Most recent
£47,000
Median price across the last 5 sales in SA19 6AE: £166,000 (2025–2021).
Nearby sales in SA19 6AE
1 Carmarthen Street, Llandeilo, SA19 6AE
Sold Apr 2025
£230,00013 Carmarthen Street, Llandeilo, SA19 6AE
Sold Dec 2023
£166,0003a, Carmarthen Street, Llandeilo, SA19 6AE
Sold Dec 2023
£250,0007a, Carmarthen Street, Llandeilo, SA19 6AE
Sold Jan 2021
£140,00016 Carmarthen Street, Llandeilo, SA19 6AE
Sold Jan 2021
£240,000
Everything we know about 12 Carmarthen Street, 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 Carmarthen Street homes
12 Carmarthen Street is notably below the street on price per m².
Price per m²
£635
Street avg £2,133
Floor Area
74 m²
Street avg 67 m²
Habitable Rooms
3 rooms
Street avg 4 rooms
CO₂ Emissions
3.4 t/year
Street avg 3.1 t/year
Similar properties nearby
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1 Clarendon Road
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1 Carmarthen Street
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
King Street — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.