9 Cwmsaerbren Street, Treherbert, Treorchy, CF42 5HY
About 9 Cwmsaerbren Street
9 Cwmsaerbren Street is a mid-terrace house in Treherbert, Treorchy, Treorchy (CF42 5HY). It has a recorded floor area of 107 m² (around 1152 sq ft), construction records dating it to 1900-1929 and council tax band A. The latest certificate (July 2019) shows an E (score 54), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 80), a 2-band jump.
It hasn't traded since January 1997, a hold of 29 years that's notably long for the area. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £130,000 sits 409.8% above the 1997 sale of £25,500. On a £-per-square-foot basis, the last sale (£22/sq ft) was about 63.8% below the postcode norm. 2 planning records sit against the property, 2 approved, 0 refused. Past consents include an extension, meaningful when judging how the property has evolved. At 107 m² it's 28.9% larger than the typical home in the postcode (83 m² median across 18 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 72% of similar EPCs).
Know exactly what you're buying at 9 Cwmsaerbren 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
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
9 Cwmsaerbren Street's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Planning history
9 Cwmsaerbren Street has 2 separate extension applications on the council record.
- Jul 2012ExtensionFullIn report
Extension: Rear of property
Extension to rear and new steel stairs for rear access
- Agent
- RCT - Private Sector Housing Unit
- Documents
- 7 docs on file
- Reference
- 12/0722/10
- Jul 2012ExtensionFullIn report
Extension: Rear of property
Extension to rear and new steel stairs for rear access
- Documents
- 8 docs on file
- Reference
- 12/0722/FUL
We flagged 1 thing worth checking at 9 Cwmsaerbren 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.
- Signs of HMO activity in the area
30-day money-back guarantee
Sales history & valuation
9 Cwmsaerbren Street's modelled value sits at over four times its earliest registered sale price (1997).
£130,000
Modelled from EPC, postcode comparables.
£25,500
Recorded with HM Land Registry.
Sales timeline
10 January 1997Most recent
£25,500
Median price across the last 5 sales in CF42 5HY: £85,000 (2025–2017).
Nearby sales in CF42 5HY
1 Cwmsaerbren Street, Treherbert, Treorchy, CF42 5HY
Sold Feb 2025
£86,0003 Cwmsaerbren Street, Treherbert, Treorchy, CF42 5HY
Sold Nov 2022
£120,00017 Cwmsaerbren Street, Treherbert, Treorchy, CF42 5HY
Sold Nov 2020
£85,0008 Cwmsaerbren Street, Treherbert, Treorchy, CF42 5HY
Sold Mar 2019
£84,50024 Cwmsaerbren Street, Treherbert, Treorchy, CF42 5HY
Sold Dec 2017
£61,000
Everything we know about 9 Cwmsaerbren 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
- Signs of HMO activity in the area

Versus other Cwmsaerbren Street homes
9 Cwmsaerbren Street is notably below the street on price per m².
Price per m²
£238
Street avg £842
Floor Area
107 m²
Street avg 86 m²
Habitable Rooms
4 rooms
Street avg 5 rooms
CO₂ Emissions
8.0 t/year
Street avg 5.1 t/year
Similar properties nearby
1 Charles Street, Treherbert
CF42 5HF
1 Cwmsaerbren Street, Treherbert
CF42 5HY
1 Ael Y Bryn, Treherbert
CF42 5HD
1 Bute Street, Treherbert
CF42 5NP
1 Collins Close, Treherbert
CF42 5NH
1 Delwyn Terrace, Blaencwm
CF42 5ED
1 Clyngwyn Terrace, Blaenrhondda
CF42 5SH
1 Alma Street, Treherbert
CF42 5LY
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
Treherbert Rail Station — railway station.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.