18 Cardiff Street, Treorchy, CF42 6BG
About 18 Cardiff Street
18 Cardiff Street is a three-bedroom mid-terrace house in Treorchy (CF42 6BG). It has a recorded floor area of 98 m² (around 1055 sq ft), construction records dating it to 1900-1929 and council tax band B. The latest certificate (September 2024) shows a D (score 62), on the cusp of jumping into the C band. When first surveyed in July 2009 the rating was E, the property has climbed 1 band since. Between certificates, roof efficiency went from Average to Good. The recommended improvements would lift it to B (score 86), a 2-band jump.
It changed hands recently, sold July 2025 for £133,500. At 98 m² it's 21% larger than the typical home in the postcode (81 m² median across 27 EPCs). Across 2003–2025, sale prices on this property compounded at 4.8% per year. Today's modelled estimate of £153,000 is 14.6% above the 2025 sale price. On a £-per-square-foot basis, the last sale (£127/sq ft) was about 51% above the typical sold price in the postcode.
Know exactly what you're buying at 18 Cardiff Street
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
What this property has
Inside
- Bedrooms3
- Bathrooms1
Energy performance
18 Cardiff Street's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Roof insulation improved
Planning history
18 Cardiff Street has no planning applications on record.
The full report still covers planning activity across the surrounding area.
Sales history & valuation
18 Cardiff Street has more than doubled in price since the earliest registered sale in 2003.
£153,000
Modelled from EPC, postcode comparables and a sale-price growth of 4.8% per year over 22 years.
£133,500
Growth on file: 4.8% per year over 22 years.
Sales timeline
31 July 2025Most recent
£133,500
+93.5%over 14 years26 August 2010
£69,000
+46.8%over 7 years7 March 2003
£47,000
Median price across the last 5 sales in CF42 6BG: £110,000 (2022–2017).
Nearby sales in CF42 6BG
Everything we know about 18 Cardiff Street, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
- Am I paying too much?
- Is something wrong with it?
- Is the agent's story true?
- Will it hold its value?
Versus other Cardiff Street homes
18 Cardiff Street is notably below the street on years held.
Price per m²
£1,362
Street avg £1,165
Floor Area
98 m²
Street avg 82 m²
Habitable Rooms
4 rooms
Street avg 4 rooms
CO₂ Emissions
6.0 t/year
Street avg 4.8 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
Cardiff Arms — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.