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Get started21 William Street is a three-bedroom mid-terrace house in Brynna, Pontyclun, Pontyclun (CF72 9QJ). It has a recorded floor area of 88 m² (around 947 sq ft), construction records dating it to 1900-1929 and council tax band B. The latest certificate (March 2015) shows an E (score 45), well below the UK norm with real room to improve. The recommended improvements would lift it to B (score 82), a 3-band jump. The latest certificate is from March 2015, so improvements made since then won't be reflected.
Sale prices here have outpaced England HPI: 6.5% per year against 0% for the wider region. Today's modelled estimate of £185,000 sits 50.4% above the 2017 sale of £123,000. On a £-per-square-foot basis, the last sale (£130/sq ft) was about 30.3% above the typical sold price in the postcode. 9 years since the last transfer (October 2017). Across the public record there are 4 sales, relatively high churn for a single property. It lags the bulk of the postcode on energy efficiency (less efficient than 72% of similar EPCs).
21 William Street's carbon output runs well above what efficient homes in the postcode produce.
This certificate is over 10 years old and is no longer valid.Expired 22 Mar 2025
Sale price has grown by over 3x since 1998.
£185,000
Modelled from EPC, postcode comparables and a sale-price growth of 6.5% per year over 19 years.
£123,000
Growth on file: 6.5% per year over 19 years.
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On habitable rooms, 21 William Street stands well clear of the street.
Price per m²
£1,398
Street avg £1,204
Floor Area
88 m²
Street avg 99 m²
Habitable Rooms
6 rooms
Street avg 5 rooms
Crime
4/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Eagle Hotel — bus stop.
6 October 2017Most recent
£123,000
+36.7%over 12 months12 October 2016
£90,000
+1.1%over 11 years8 September 2005
£89,000
+137.3%over 6 years22 December 1998
£37,500
Median price across the last 5 sales in CF72 9QJ: £151,000 (2023–2019).
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CO₂ Emissions
6.2 t/year
Street avg 4.8 t/year
CF72 9ZG