21, William Street
21, William Street
Description & Estimates







The public record describes 21, William Street, Treorchy as a mid-century apartment with 333 ft2 of internal area.
In this area, apartments of this size normally have 2 bedrooms.
21, William Street, Treorchy has an estimated sale value of £37,910 and an estimated rental value of £274 per month, assuming reasonable condition and based on the information available.
William Street, Treherbert, Treorchy, CF42 lies within the CF42 postal district.
Our Data Sources
21, William Street, Treorchy has no records in the the Land Registry and a single entry in the EPC database dated October 2025.
We combine this information with public data of neighbouring properties to estimate the property attributes and values.
The local information is scored as 1 out of 5 and is considered of low accuracy.
Price Range & Condition
In very good condition, we estimate 21, William Street, Treorchy would be worth £39,806, with a potential rental value of £288 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £35,256, with a rental value of £255 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Recent Market Change
The estimated sale value of 21, William Street, Treorchy has risen by £434 (1.1%) over the last year. During the same period, its estimated monthly rental value has moved up by £7 (2.5%). The property's estimated gross yield is currently 8.7%.
Energy Efficiency
21, William Street, Treorchy has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 06 Oct 2025.
The property is connected to mains gas and has fully double glazed windows. It is heated using Boiler and radiators, mains gas.
Properties Sold Nearby
Land Registry records and our Estate Agent network show 3 sales within 950 metres of 21, William Street, Treorchy across the last 2 years.
Most recently, 1, William Street, Treorchy, CF42 5LW, a freehold house, sold at £119,000 on the 27th May 2016.
Read more about house prices in CF42.
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
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Location Comparison
Our analysis of the public data ranks 21, William Street, Treorchy as the 37th largest and the 37th most expensive of the 37 addresses on William Street, Treherbert, Treorchy, CF42.
Against the CF42 postcode district average, it is £114k less expensive than the typical property.
More reading links
Schools Nearby
Public Transport Nearby
Treherbert station is the nearest stop to 21, William Street, Treorchy at 700 metres away.
- 700mTreherbert
- 1.9kmYnyswen
- 3.3kmTreorchy
Available Internet Speeds
Ofcom's latest figures show superfast broadband available in this area.
According to recent data from Ofcom, Superfast broadband is available in the area.
Risk of Flooding
Environment Agency data suggests this area has a very low risk of flooding.

