8 William Street, Ystradgynlais, Swansea, SA9 1AT
About 8 William Street
8 William Street is a mid-terrace house in Ystradgynlais, Swansea, Swansea (SA9 1AT). It has a recorded floor area of 80 m² (around 861 sq ft), construction records dating it to 1900-1929 and council tax band B. The latest certificate (May 2024) shows a C (score 69), just inside the C band. The recommended improvements would push it to B (score 89).
On energy efficiency it sits in the top 10% of properties in this postcode.
Know exactly what you're buying at 8 William 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
8 William Street ranks among the most efficient homes in the postcode for energy use.
EPC Rating
Planning history
8 William Street has no planning applications on record.
Notable planning nearby
2applications of note in the surrounding area
We flagged 1 thing worth checking at 8 William 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
8 William Street has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£158,000
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 SA9 1AT: £127,000 (2025–2019).
Nearby sales in SA9 1AT
2 William Street, Ystradgynlais, Swansea, SA9 1AT
Sold Jul 2025
£209,95020 William Street, Ystradgynlais, Swansea, SA9 1AT
Sold Dec 2023
£125,00015 William Street, Ystradgynlais, Swansea, SA9 1AT
Sold Mar 2021
£127,000Ty Gardd, William Street, Ystradgynlais, Swansea, SA9 1AT
Sold Nov 2019
£235,0003 William Street, Ystradgynlais, Swansea, SA9 1AT
Sold Apr 2019
£85,000
Everything we know about 8 William 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 William Street homes
EPC Rating for 8 William Street runs comfortably ahead of the street norm.
EPC Rating
69 (C)
Street avg 56 (D)
Floor Area
80 m²
Street avg 88 m²
CO₂ Emissions
3.4 t/year
Street avg 5.0 t/year
Habitable Rooms
5 rooms
Street avg 4 rooms
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The neighbourhood at a glance
Crime
6/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Glanrhyd Hospital — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.