21 Thomas Street, Llandeilo, SA19 6LB
About 21 Thomas Street
21 Thomas Street is a four-bedroom end-of-terrace house in Llandeilo (SA19 6LB). It has a recorded floor area of 146 m² (around 1572 sq ft), construction records dating it to 1900-1929 and council tax band D. The latest certificate (March 2022) shows a D (score 63), on the cusp of jumping into the C band. When first surveyed in October 2008 the rating was F, the property has climbed 2 bands since. Between certificates, wall efficiency went from Very Poor to Poor, hot-water efficiency went from Very Poor to Good and lighting went from Very Poor to Very Good; while roof efficiency dropped from Good to Average. The recommended improvements would push it to C (score 77).
At 146 m² the property is well over the postcode median (103 m² across 11 EPCs), placing it in the larger end of the local stock. Across 2009–2023, sale prices on this property compounded at 2% per year. On a £-per-square-foot basis, the last sale (£183/sq ft) was about 18.8% above the typical sold price in the postcode. Sold October 2023 for £288,000.
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Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
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Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
What this property has
Inside
- Bedrooms4
Energy performance
21 Thomas Street's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Hot water system upgraded
Wall insulation improved
More low energy lighting installed
Planning history
21 Thomas Street has no planning applications on record.
Notable planning nearby
4applications of note in the surrounding area
We flagged 1 thing worth checking at 21 Thomas 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
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Sales history & valuation
21 Thomas Street valuation sits well clear of the typical sold price in this postcode.
£303,000
Modelled from EPC, postcode comparables and a sale-price growth of 2.0% per year over 14 years.
£288,000
Growth on file: 2.0% per year over 14 years.
Sales timeline
30 October 2023Most recent
£288,000
+34.0%over 14 years21 May 2009
£215,000
Median price across the last 5 sales in SA19 6LB: £190,000 (2024–2021).
Nearby sales in SA19 6LB
Everything we know about 21 Thomas 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 Thomas Street homes
On habitable rooms, 21 Thomas Street runs well behind the street norm.
Price per m²
£1,973
Street avg £2,306
Floor Area
146 m²
Street avg 110 m²
Habitable Rooms
3 rooms
Street avg 6 rooms
CO₂ Emissions
7.7 t/year
Street avg 7.4 t/year
Similar properties nearby
1 Latimer Road
SA19 6HS
1 Greenfield Place
SA19 6DN
1 George Hill
SA19 6AU
1 Johns Villas
SA19 6DP
1 Brynawel Terrace
SA19 6DA
1 Carmarthen Street
SA19 6AE
1 Clarendon Road
SA19 6LF
1 Heol Myrddin, Ffairfach
SA19 6PD
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
Llandeilo Rail Station — railway station.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.