8 Mary Street, Treherbert, Treorchy, CF42 5AE
About 8 Mary Street
8 Mary Street is a two-bedroom mid-terrace house in Treherbert, Treorchy, Treorchy (CF42 5AE). It has a recorded floor area of 72 m² (around 775 sq ft), construction records dating it to before 1900 and council tax band A. The latest certificate (June 2022) shows a D (score 64), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since February 2011. Between certificates, roof efficiency went from Poor to Average and window efficiency went from Very Poor to Good; while wall efficiency dropped from Average to Poor and hot-water efficiency dropped from Very Good to Good. The recommended improvements would lift it to B (score 88), a 2-band jump.
Across 2011–2023, sale prices on this property compounded at 11.4% per year. Today's modelled estimate of £125,000 is 19% above the 2023 sale price. On a £-per-square-foot basis, the last sale (£135/sq ft) was about 89.9% above the typical sold price in the postcode. Sold April 2023 for £105,000.
Know exactly what you're buying at 8 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
- Bathrooms2
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Hot water efficiency decreased
Single glazing replaced with double or better glazing
Roof insulation improved
Low energy lighting percentage decreased
Planning history
8 Mary Street has no planning applications on record.
Notable planning nearby
6applications of note in the surrounding area
We flagged 1 thing worth checking at 8 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
30-day money-back guarantee
Sales history & valuation
Sale price has grown by over 3x since 2011.
£125,000
Modelled from EPC, postcode comparables and a sale-price growth of 11.4% per year over 12 years.
£105,000
Growth on file: 11.4% per year over 12 years.
Sales timeline
19 April 2023Most recent
£105,000
+250.0%over 11 years5 September 2011
£30,000
Median price across the last 5 sales in CF42 5AE: £65,000 (2024–2020).
Nearby sales in CF42 5AE
2 Mary Street, Treherbert, Treorchy, CF42 5AE
Sold Apr 2024
£63,000Eastlea, 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
£65,00011 Mary Street, Treherbert, Treorchy, CF42 5AE
Sold Oct 2020
£53,000
Everything we know about 8 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

Versus other Mary Street homes
On years held, 8 Mary Street runs well behind the street norm.
Price per m²
£1,458
Street avg £997
Floor Area
72 m²
Street avg 70 m²
Habitable Rooms
4 rooms
Street avg 4 rooms
CO₂ Emissions
3.8 t/year
Street avg 3.8 t/year
Similar properties nearby
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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.