Nant Loyw, Nantyglyn Road, Glanamman, Ammanford, SA18 2YT
About Nant Loyw
Nant Loyw is a four-bedroom detached house in Glanamman, Ammanford, Ammanford (SA18 2YT). It has a recorded floor area of 240 m² (around 2583 sq ft), construction records dating it to 1996-2002 and council tax band F. The latest certificate (February 2025) shows a C (score 74). When first surveyed in December 2009 the rating was D, the property has climbed 1 band since. Between certificates, roof efficiency went from Very Poor to Average, window efficiency went from Average to Good and lighting went from Poor to Very Good. The recommended improvements would push it to B (score 81).
Held since August 2006 — that's 20 years off the open market, well above the local norm. At 240 m² the property is well over the postcode median (130 m² across 12 EPCs), placing it in the larger end of the local stock. On energy efficiency it sits in the top 10% of properties in this postcode. Today's modelled estimate of £448,000 sits 79.2% above the 2006 sale of £250,000. One planning record on file: an extension approved in 2013. Past consents include an extension and a garage conversion, meaningful when judging how the property has evolved.
Know exactly what you're buying at Nant Loyw
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
- Bedrooms4
Energy performance
Nant Loyw ranks among the most efficient homes in the postcode for energy use.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Window efficiency improved
Roof insulation improved
Floor insulation added or improved
More low energy lighting installed
Planning history
- Jun 2013Garage ConversionFullIn report
CHANGE OF USE OF DOMESTIC GARAGE TO HABITABLE ROOM WITH NEW LINK EXTENSION
Extension- Documents
- 7 docs on file
- Reference
- E/28159
We flagged 1 thing worth checking at Nant Loyw
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
Nant Loyw valuation sits well clear of the typical sold price in this postcode.
£448,000
Modelled from EPC, postcode comparables.
£250,000
Recorded with HM Land Registry.
Sales timeline
22 August 2006Most recent
£250,000
Median price across the last 5 sales in SA18 2YT: £285,000 (2023–2018).
Nearby sales in SA18 2YT
4 Nantyglyn Road, Glanamman, Ammanford, SA18 2YT
Sold Nov 2023
£202,500Maes Y Wennol, Nantyglyn Road, Glanamman, Ammanford, SA18 2YT
Sold Jan 2020
£749,999Swn Y Nant, Nantyglyn Road, Glanamman, Ammanford, SA18 2YT
Sold Jul 2019
£285,0008 Nantyglyn Road, Glanamman, Ammanford, SA18 2YT
Sold Jan 2019
£310,0002 Nantyglyn Road, Glanamman, Ammanford, SA18 2YT
Sold May 2018
£90,000
Everything we know about Nant Loyw, 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 Nantyglyn Road homes
Nant Loyw outperforms the street on epc rating by a wide margin.
Price per m²
£1,042
Street avg £1,370
Floor Area
240 m²
Street avg 175 m²
Habitable Rooms
9 rooms
Street avg 7 rooms
CO₂ Emissions
6.3 t/year
Street avg 8.0 t/year
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The neighbourhood at a glance
Crime
5/mo
Steady year-on-year across the wider district.
Nearest stop
0.4 km
Amman Road Turn — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.