11 Mary Street, Treherbert, Treorchy, CF42 5AE
About 11 Mary Street
11 Mary Street is a two-bedroom mid-terrace house in Treherbert, Treorchy, Treorchy (CF42 5AE). It has a recorded floor area of 69 m² (around 743 sq ft), construction records dating it to before 1900 and council tax band A. Tenure is freehold. The latest certificate (February 2023) shows a C (score 69), just inside the C band. When first surveyed in August 2020 the rating was D, the property has climbed 1 band since. Between certificates, roof efficiency went from Very Poor to Good and lighting went from Average to Very Good. The recommended improvements would push it to B (score 89).
Today's modelled estimate of £115,000 sits 117% above the 2020 sale of £53,000. 4 planning records sit against the property, 0 approved, 4 refused. Sold October 2020 for £53,000.
Know exactly what you're buying at 11 Mary 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
What this property has
Inside
- Bedrooms2
Building
- TenureFreehold
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Loft insulation installed or upgraded to 250mm+
More low energy lighting installed
Planning history
A an extension application was refused at 11 Mary Street in 2022.
- Nov 2022ExtensionFullIn report
Rear glazed balcony
- Agent
- Atrium Planning Consultants
- Documents
- 3 docs on file
- Reference
- 22/1092/10
- Nov 2022ExtensionFullIn report
Rear glazed balcony
- Agent
- Atrium Planning Consultants
- Documents
- 3 docs on file
- Reference
- 22/1092/FUL
We flagged 2 things worth checking at 11 Mary 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
- A planning decision worth checking
30-day money-back guarantee
Sales history & valuation
The latest sale landed in the post-pandemic price surge — useful context when reading the figure.
£115,000
Modelled from EPC, postcode comparables.
£53,000
Recorded with HM Land Registry.
Sales timeline
7 October 2020Most recent
£53,000
Median price across the last 5 sales in CF42 5AE: £105,000 (2024–2021).
Nearby sales in CF42 5AE
2 Mary Street, Treherbert, Treorchy, CF42 5AE
Sold Apr 2024
£63,0008 Mary Street, Treherbert, Treorchy, CF42 5AE
Sold Apr 2023
£105,000Eastlea, Mary Street, Treherbert, Treorchy, CF42 5AE
Sold May 2022
£186,0006 Mary Street, Treherbert, Treorchy, CF42 5AE
Sold Nov 2021
£139,9954 Mary Street, Treherbert, Treorchy, CF42 5AE
Sold Jun 2021
£65,000
Everything we know about 11 Mary 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
- A planning decision worth checking

Versus other Mary Street homes
On habitable rooms, 11 Mary Street runs well behind the street norm.
Price per m²
£768
Street avg £1,074
Floor Area
69 m²
Street avg 70 m²
Habitable Rooms
3 rooms
Street avg 4 rooms
CO₂ Emissions
3.6 t/year
Street avg 3.8 t/year
Similar properties nearby
1 Brook Street, Blaenrhondda
CF42 5SG
1 Crichton Street, Treherbert
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1 Coldra Road, Treherbert
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1 David Street, Treherbert
CF42 5LB
1 Brynfedwen Close, Treherbert
CF42 5PB
1 Blaen Y Cwm Terrace, Treherbert
CF42 5ND
1 Abertonllwyd Street, Treherbert
CF42 5PF
1 Blaen Y Cwm Road, Blaencwm
CF42 5DG
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
New Inn — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.