20 Mountain Road, Upper Brynamman, Ammanford, SA18 1AE
About 20 Mountain Road
20 Mountain Road is a detached house in Upper Brynamman, Ammanford, Ammanford (SA18 1AE). It has a recorded floor area of 85 m² (around 915 sq ft), construction records dating it to before 1900 and council tax band B. The latest certificate (May 2021) shows an E (score 53), well below the UK norm with real room to improve. When first surveyed in January 2021 the rating was F, the property has climbed 1 band since. Between certificates, roof efficiency went from Average to Very Good. The recommended improvements would lift it to B (score 83), a 3-band jump. Main heating runs on oil.
Held since July 2003 — that's 23 years off the open market, well above the local norm. Across 2002–2003, sale prices on this property compounded at 57.6% per year. Today's modelled estimate of £161,000 sits 122.1% above the 2003 sale of £72,500. On a £-per-square-foot basis, the last sale (£79/sq ft) was about 24.8% below the postcode norm.
Know exactly what you're buying at 20 Mountain Road
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
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Loft insulation upgraded to recommended levels
Planning history
20 Mountain Road has no planning applications on record.
Notable planning nearby
3applications of note in the surrounding area
We flagged 2 things worth checking at 20 Mountain Road
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
- Recent ownership pattern worth a look
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Sales history & valuation
20 Mountain Road's estimated value is more than triple its earliest registered sale price (2002).
£161,000
Modelled from EPC, postcode comparables and a sale-price growth of 57.6% per year over 1 year.
£72,500
Growth on file: 57.6% per year over 1 year.
Sales timeline
17 July 2003Most recent
£72,500
+57.6%over 8 months11 November 2002
£46,000
Median price across the last 5 sales in SA18 1AE: £115,000 (2025–2023).
Nearby sales in SA18 1AE
46 Mountain Road, Upper Brynamman, Ammanford, SA18 1AE
Sold Apr 2025
£208,50021 Mountain Road, Upper Brynamman, Ammanford, SA18 1AE
Sold Jul 2024
£115,00024 Mountain Road, Upper Brynamman, Ammanford, SA18 1AE
Sold Mar 2024
£99,00049 Mountain Road, Upper Brynamman, Ammanford, SA18 1AE
Sold Oct 2023
£273,00019 Mountain Road, Upper Brynamman, Ammanford, SA18 1AE
Sold Sept 2023
£99,500
Everything we know about 20 Mountain Road, 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
- Recent ownership pattern worth a look

Versus other Mountain Road homes
Years Held for 20 Mountain Road runs comfortably ahead of the street norm.
Price per m²
£853
Street avg £1,261
Floor Area
85 m²
Street avg 93 m²
Habitable Rooms
6 rooms
Street avg 5 rooms
CO₂ Emissions
5.0 t/year
Street avg 6.9 t/year
Similar properties nearby
1 Bishop Road, Garnant
SA18 1NA
1 Brynceunant, Upper Brynamman
SA18 1AH
1 Clos David Morgan, Garnant
SA18 1AZ
1 Amman Cottages, Lower Brynamman
SA18 1SL
1 Chapel Street, Upper Brynamman
SA18 1AD
1 Banwen Place, Lower Brynamman
SA18 1SP
1 Arcade Terrace, Garnant
SA18 1LG
1 Clos Cerrig, Cwmgors
SA18 1AX
The neighbourhood at a glance
Crime
5/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
New Road — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.