5 Mary Street, Treherbert, Treorchy, CF42 5AE
About 5 Mary Street
5 Mary Street is a three-bedroom end-of-terrace house in Treherbert, Treorchy, Treorchy (CF42 5AE). It has a recorded floor area of 67 m² (around 721 sq ft), construction records dating it to before 1900 and council tax band A. The latest certificate (January 2016) shows a D (score 58), a step below the typical UK home. The recommended improvements would lift it to B (score 86), a 2-band jump. The latest certificate is from January 2016, so improvements made since then won't be reflected.
Across 2006–2014, sale prices on this property compounded at -10.1% per year. Today's modelled estimate of £116,000 sits 329.6% above the 2014 sale of £27,000. On a £-per-square-foot basis, the last sale (£37/sq ft) was about 47.5% below the postcode norm. Last sold in May 2014, so it's been off the market for around 12 years. Across the public record there are 4 sales, relatively high churn for a single property.
Know exactly what you're buying at 5 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
- Bedrooms3
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 20 Jan 2026
EPC Rating
Planning history
5 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 5 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
5 Mary Street saw 4 transfers in just over a decade — high turnover for the postcode.
£116,000
Modelled from EPC, postcode comparables and a sale-price growth of -10.1% per year over 7 years.
£27,000
Growth on file: -10.1% per year over 7 years.
Sales timeline
26 May 2014Most recent
£27,000
-28.9%over 4 years29 April 2010
£38,000
-39.7%over 2 years20 September 2007
£63,000
+5.0%over 10 months30 November 2006
£60,000
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 5 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
5 Mary Street is notably below the street on epc rating.
Price per m²
£403
Street avg £1,115
Floor Area
67 m²
Street avg 70 m²
Habitable Rooms
4 rooms
Street avg 4 rooms
CO₂ Emissions
4.9 t/year
Street avg 3.7 t/year
Similar properties nearby
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1 Blaen Y Cwm Terrace, Treherbert
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1 Brook Street, Blaenrhondda
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1 Cwrt Yr Ysgol, Treherbert
CF42 5PX
1 Chapel Street, Blaenrhondda
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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.