15 Bonllwyn, Ammanford, SA18 2EF
About 15 Bonllwyn
15 Bonllwyn is a semi-detached house in Ammanford (SA18 2EF). It has a recorded floor area of 92 m² (around 990 sq ft), construction records dating it to 1900-1929 and council tax band B. The latest certificate (February 2025) shows a D (score 57), a step below the typical UK home. The rating has held steady at D across 2 certificates since August 2012. Between certificates, hot-water efficiency dropped from Very Good to Good. The recommended improvements would lift it to B (score 83), a 2-band jump.
Know exactly what you're buying at 15 Bonllwyn
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
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Planning history
15 Bonllwyn has no planning applications on record.
Notable planning nearby
3applications of note in the surrounding area
We flagged 1 thing worth checking at 15 Bonllwyn
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
15 Bonllwyn has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£136,000
Modelled from EPC, postcode comparables.
No sales recorded with HM Land Registry
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
Median price across the last 5 sales in SA18 2EF: £138,000 (2025–2023).
Everything we know about 15 Bonllwyn, 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 Bonllwyn homes
EPC Rating
57 (D)
Street avg 56 (D)
Floor Area
92 m²
Street avg 109 m²
CO₂ Emissions
4.5 t/year
Street avg 5.6 t/year
Habitable Rooms
5 rooms
Street avg 5 rooms
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
5/mo
Steady year-on-year across the wider district.
Nearest stop
0.0 km
Blaenau — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.