Heddwyn, Brynmawr Lane, Ammanford, SA18 2BY
About Heddwyn
Heddwyn is a detached house in Ammanford (SA18 2BY). It has a recorded floor area of 125 m² (around 1341 sq ft), construction records dating it to 1930-1949 and council tax band F. The latest certificate (April 2009) shows an E (score 41), well below the UK norm with real room to improve. The recommended improvements would push it to D (score 65). The latest certificate is from April 2009, so improvements made since then won't be reflected.
Held since November 2010 — that's 16 years off the open market, well above the local norm. Today's modelled estimate of £308,000 sits 66.5% above the 2010 sale of £185,000. On a £-per-square-foot basis, the last sale (£138/sq ft) was about 36.4% below the postcode norm.
Know exactly what you're buying at Heddwyn
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
Heddwyn'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This certificate is over 10 years old and is no longer valid.Expired 14 Apr 2019
EPC Rating
Planning history
Heddwyn has no planning applications on record.
Notable planning nearby
3applications of note in the surrounding area
We flagged 1 thing worth checking at Heddwyn
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
Heddwyn valuation sits well clear of the typical sold price in this postcode.
£308,000
Modelled from EPC, postcode comparables.
£185,000
Recorded with HM Land Registry.
Sales timeline
29 November 2010Most recent
£185,000
Median price across the last 5 sales in SA18 2BY: £175,000 (2025–2002).
Everything we know about Heddwyn, 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 Brynmawr Lane homes
Price per m² for Heddwyn lags the street by a wide margin.
Price per m²
£1,485
Street avg £2,499
Floor Area
125 m²
Street avg 116 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
9.2 t/year
Street avg 5.3 t/year
Similar properties nearby
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
0.1 km
Town Hall — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.