20 Chapel Street, Upper Brynamman, Ammanford, SA18 1AD
About 20 Chapel Street
20 Chapel Street is a mid-terrace house in Upper Brynamman, Ammanford, Ammanford (SA18 1AD). It has a recorded floor area of 80 m² (around 861 sq ft), construction records dating it to before 1900 and council tax band A. The latest certificate (September 2025) shows a C (score 80), near the top of the C band. When first surveyed in September 2015 the rating was E, 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 Average and main heating went from Poor to Very Good; while roof efficiency dropped from Good to Average and window efficiency dropped from Good to Average. The recommended improvements would push it to B (score 88). Main heating runs on electricity.
Across 2000–2016, sale prices on this property compounded at 10% per year. Today's modelled estimate of £144,000 sits 69.4% above the 2016 sale of £85,000. Its energy rating outperforms most of the postcode (better than 85% of similar EPCs). Last sold in September 2016, so it's been off the market for around 10 years.
Know exactly what you're buying at 20 Chapel Street
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
20 Chapel Street's carbon output is low for the local stock.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Fuel source changed
Hot water system upgraded
Hot water system changed
Changed to a more efficient fuel source
Low energy lighting percentage decreased
Heat pump installed, significantly improving energy efficiency
Changed to a more efficient fuel source
Hot water system upgraded
Wall insulation improved
Roof insulation improved
More low energy lighting installed
Mechanical ventilation installed
Solar PV panels (60 kWp) installed
Planning history
20 Chapel Street has no planning applications on record.
Notable planning nearby
3applications of note in the surrounding area
We flagged 1 thing worth checking at 20 Chapel 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
30-day money-back guarantee
Sales history & valuation
20 Chapel Street has more than quadrupled in price since its earliest registered sale in 2000.
£144,000
Modelled from EPC, postcode comparables and a sale-price growth of 10.0% per year over 16 years.
£85,000
Growth on file: 10.0% per year over 16 years.
Sales timeline
27 September 2016Most recent
£85,000
+54.5%over 12 years28 April 2004
£55,000
+205.6%over 3 years1 June 2000
£18,000
Median price across the last 5 sales in SA18 1AD: £104,000 (2025–2021).
Nearby sales in SA18 1AD
13 Chapel Street, Upper Brynamman, Ammanford, SA18 1AD
Sold May 2025
£184,0007 Chapel Street, Upper Brynamman, Ammanford, SA18 1AD
Sold Aug 2024
£104,00012 Chapel Street, Upper Brynamman, Ammanford, SA18 1AD
Sold May 2024
£110,00011 Chapel Street, Upper Brynamman, Ammanford, SA18 1AD
Sold Jun 2021
£159,9509 Chapel Street, Upper Brynamman, Ammanford, SA18 1AD
Sold Sept 2020
£61,000
Everything we know about 20 Chapel 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 Chapel Street homes
20 Chapel Street outperforms the street on epc rating by a wide margin.
Price per m²
£1,063
Street avg £1,250
Floor Area
80 m²
Street avg 82 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
0.5 t/year
Street avg 5.9 t/year
Similar properties nearby
1 Clos Cerrig, Cwmgors
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1 Arcade Terrace, Garnant
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1 Brook Cottages, Garnant
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1 Banwen Place, Lower Brynamman
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1 Amman Cottages, Lower Brynamman
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1 Clos David Morgan, Garnant
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1 Arfryn, Upper Brynamman
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1 Brynceunant, Upper Brynamman
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The neighbourhood at a glance
Crime
5/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Quarry Road — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.