Our Data Sources
17, Mostyn Square, Cardiff has a single entry in the Land Registry from May 2008 and no records in the EPC database.
We combine this sold price information with public data of neighbouring properties to estimate the 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 17, Mostyn Square, Cardiff would be worth £666,192, with a potential rental value of £2,035 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £590,056, with a rental value of £1,802 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Plot Size
17, Mostyn Square, Cardiff occupies a 289 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 4th largest.
Sold Prices
17, Mostyn Square, Cardiff last changed hands on 30th May 2008, selling for £340,000. The transaction was logged as a freehold house by HM Land Registry.
That is its only recorded sale since 1995.
The market for similar properties has risen by 118.5% since May 2008.
- Sold May 2008£340,000
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 25 sales of comparable properties within 620 metres of 17, Mostyn Square, Cardiff since 2008.
Most recently, 9, St. Asaph Close, Cardiff, CF14 4LD, a freehold house, sold at £613,000 on the 6th November 2025.
Read more about house prices in CF14.
- Sold Nov 2025£613,000 | 4 Bed House9, St. Asaph Close, Cardiff, CF14 4LD9, St. Asaph Close, Cardiff, CF14 4LD
- Sold Oct 2023£535,000 | 4 Bed House25, Heol Mynydd Bychan, Cardiff, CF14 4NL25, Heol Mynydd Bychan, Cardiff, CF14 4NL
- Sold Jan 2023£577,500 | 4 Bed House85, Beulah Road, Cardiff, CF14 6LW85, Beulah Road, Cardiff, CF14 6LW
- Sold Jan 2022£640,000 | 5 Bed House51, Beulah Road, Cardiff, CF14 6LU51, Beulah Road, Cardiff, CF14 6LU
- Sold Nov 2021£678,500 | 4 Bed House73, Beulah Road, Cardiff, CF14 6LW73, Beulah Road, Cardiff, CF14 6LW
Nearby is defined as the radius comprising the nearest 2,000 addresses.
More reading links
Explore Nearby Properties
The surrounding properties have an average estimated value of £372,124, ranging from £147,369 to £604,367.
- 15 Mostyn Square
4 Bed House | 14 m | Est. Value: £372,540
- 19 Mostyn Square
3 Bed House | 18 m | Est. Value: £347,771
- 11 Mostyn Square
3 Bed House | 19 m | Est. Value: £341,366
- 27 Mostyn Square
4 Bed House | 22 m | Est. Value: £563,958
- 21 Mostyn Square
3 Bed House | 24 m | Est. Value: £349,433
Location Comparison
Our analysis of the public data ranks 17, Mostyn Square, Cardiff as the largest and the most expensive of the 41 addresses on Mostyn Square, Llanishen, Cardiff, CF14.
Against the CF14 postcode district average, it is £263k more 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 available in this area.
Risk of Flooding
Environment Agency data suggests this area has a Very Low risk of flooding.
