According to data from HM Land Registry, 45, Mostyn Square, Cardiff sits on a plot of 313 m².

We have plot size data on 30 out of 40 other houses in the postcode and 45, Mostyn Square, Cardiff sits on the largest plot.

45, Mostyn Square, Cardiff has an Energy Performance Rating (EPC) of B. This is based on the most recent assessment, dated 30 Oct 2008.

The property is not connected to mains gas and has windows. It is heated using sap05:main-heating.

According to HM Land Registry, 45, Mostyn Square, Cardiff was last sold on 19th May 2009 for £240,000 and was recorded as a freehold house.

The property has only had this single sale since 1995.

Since May 2009, the market for similar properties has risen by 101.7%.

• Sold May 2009£240,000

According to the Land Registry and our network of Estate Agents, there have been 45 sales of properties similar to 45, Mostyn Square, Cardiff within a radius of 580 metres since 2008.

The most recent example is 74, Beulah Road, Cardiff, CF14 6LY, a freehold house which sold for £615,000 on the 22nd December 2025.

Read more about house prices in CF14.

• Sold Dec 2025£615,000 | 4 Bed House74, Beulah Road, Cardiff, CF14 6LY74, Beulah Road, Cardiff, CF14 6LY
• Sold Dec 2025£575,000 | 4 Bed House23, Heol Mynydd Bychan, Cardiff, CF14 4NL23, Heol Mynydd Bychan, Cardiff, CF14 4NL
• Sold Mar 2025£525,000 | 4 Bed House21, Heol Mynydd Bychan, Cardiff, CF14 4NL21, Heol Mynydd Bychan, Cardiff, CF14 4NL
• Sold May 2024£475,000 | 4 Bed House112, Ty Glas Road, Cardiff, CF14 5EG112, Ty Glas Road, Cardiff, CF14 5EG
• Sold Oct 2023£535,000 | 4 Bed House25, Heol Mynydd Bychan, Cardiff, CF14 4NL25, Heol Mynydd Bychan, Cardiff, CF14 4NL
• Sold Jan 2023£14,319,112 | 4 Bed HouseUnit 1A, Parc Ty Glas, Cardiff, CF14 5DUUnit 1A, Parc Ty Glas, Cardiff, CF14 5DU
• Sold Jan 2023£577,500 | 4 Bed House85, Beulah Road, Cardiff, CF14 6LW85, Beulah Road, Cardiff, CF14 6LW
• Sold Nov 2022£575,000 | 4 Bed House21, Thornhill Road, Cardiff, CF14 6PD21, Thornhill Road, Cardiff, CF14 6PD
• Sold Sep 2022£490,000 | 4 Bed House21, Ty Glas Road, Cardiff, CF14 5EB21, Ty Glas Road, Cardiff, CF14 5EB
• Sold Dec 2021£445,000 | 4 Bed House27, Coed Glas Road, Cardiff, CF14 5EJ27, Coed Glas Road, Cardiff, CF14 5EJ
• Sold Nov 2021£495,000 | 4 Bed House23, Heol Iscoed, Cardiff, CF14 6PA23, Heol Iscoed, Cardiff, CF14 6PA
• Sold Apr 2021£395,200 | 4 Bed House76, Ashbourn Way, Cardiff, CF14 5EY76, Ashbourn Way, Cardiff, CF14 5EY
• Sold Apr 2020£275,000 | 4 Bed House15, Thornhill Road, Cardiff, CF14 6PD15, Thornhill Road, Cardiff, CF14 6PD
• Sold Dec 2017£347,500 | 4 Bed House13, Heol Iscoed, Cardiff, CF14 6PA13, Heol Iscoed, Cardiff, CF14 6PA
• Sold Dec 2016£290,000 | 4 Bed House43, Ty Glas Road, Cardiff, CF14 5EB43, Ty Glas Road, Cardiff, CF14 5EB
• Sold Aug 2015£340,000 | 4 Bed House18, Mostyn Square, Cardiff, CF14 5FE18, Mostyn Square, Cardiff, CF14 5FE
• Sold Oct 2012£267,000 | 4 Bed House9, Heol Iscoed, Cardiff, CF14 6PA9, Heol Iscoed, Cardiff, CF14 6PA
• Sold Apr 2010£288,000 | 4 Bed House27, Mostyn Square, Cardiff, CF14 5FE27, Mostyn Square, Cardiff, CF14 5FE
• Sold Jan 2009£232,000 | 4 Bed House2, Mostyn Square, Cardiff, CF14 5FE2, Mostyn Square, Cardiff, CF14 5FE
• Sold Dec 2008£272,995 | 4 Bed House23, Mostyn Square, Cardiff, CF14 5FE23, Mostyn Square, Cardiff, CF14 5FE

Mostyn Square, Llanishen, Cardiff, CF14 has a total of 41 addresses. According to our analysis of all the public data, 45, Mostyn Square, Cardiff is the 5th largest and the 5th most expensive property on the street.

When compared to the postcode district it is £183k more expensive than the average property in CF14.

• Ty Glas

  |

  300 m away
• Birchgrove

  |

  400 m away
• Rhiwbina

  |

  1.1 km away

According to data from the Environment Agency, the flood risk in this area is considered to be Very Low.