Our Data Sources
3, Mostyn Square, Cardiff has 3 entries in the Land Registry , most recently in November 2025 and a single entry in the EPC database dated August 2025.
We combine this information with that of neighbouring properties to estimate the property attributes and values.
The local information is scored as 5 out of 5 and is considered of high accuracy.
Price Range & Condition
In very good condition, we estimate 3, Mostyn Square, Cardiff would be worth £387,439, with a potential rental value of £1,891 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £343,160, with a rental value of £1,675 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Plot Size
3, Mostyn Square, Cardiff occupies a 129 m2 plot as recorded by HM Land Registry.
Of the 40 other houses in this postcode, 30 have recorded plot sizes, and this one ranks as the 24th largest.
Energy Efficiency
3, Mostyn Square, Cardiff has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 11 Aug 2025.
The property is connected to mains gas and has fully double glazed windows. It is heated using Boiler and radiators, mains gas.
Sold Prices
3, Mostyn Square, Cardiff last changed hands on 28th November 2025, selling for £338,000. The transaction was logged as a freehold house by HM Land Registry.
In total it has sold 3 times since 1995.
The market for similar properties has risen by 17.2% since November 2025.
- Sold Nov 2025£338,000
- Sold Feb 2020£274,000
- Sold Aug 2008£214,995
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 187 sales of comparable properties within 630 metres of 3, Mostyn Square, Cardiff across the last 2 years.
Most recently, 35, Mostyn Square, Cardiff, CF14 5FE, a freehold house, sold at £390,000 on the 10th December 2025.
Read more about house prices in CF14.
- Sold Dec 2025£390,000 | 4 Bed House35, Mostyn Square, Cardiff, CF14 5FE35, Mostyn Square, Cardiff, CF14 5FE
- Sold Nov 2025£335,000 | 4 Bed House205, Tatham Road, Cardiff, CF14 5FF205, Tatham Road, Cardiff, CF14 5FF
- Sold Aug 2022£360,000 | 4 Bed House15, Mostyn Square, Cardiff, CF14 5FE15, Mostyn Square, Cardiff, CF14 5FE
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
More reading links
Location Comparison
Our analysis of the public data ranks 3, Mostyn Square, Cardiff as the 18th largest and the 22nd most expensive of the 41 addresses on Mostyn Square, Llanishen, Cardiff, CF14.
Against the CF14 postcode district average, it is £3k less expensive than the typical property.
More reading links
Schools Nearby
Public Transport Nearby
- Ty Glas|300 m away
- Birchgrove|400 m away
- Rhiwbina|1.1 km away
Available Internet Speeds
Ofcom's latest figures show ultrafast broadband available in this area.
According to recent data from Ofcom, Ultrafast Broadband is available in the area.
Risk of Flooding
Environment Agency data suggests this area has a Very Low risk of flooding.
