Over the past 8 years, there have been 82 property sales recorded in the CF3 6YG postcode area. The highest sale price reached £402,500, while the most recent sale was for a semi-detached house sold in January 2026 for £255,000.

The estimated average property value in CF3 6YG currently stands at £306,309, which is approximately 9.4% lower than the city average - making it a relatively affordable option for buyers.

In terms of size, the average price per square metre is approximately £3,576.

Property prices in CF3 6YG have risen by 3.8% over the past year , with a total increase of 27% over the past five years , and a long-term rise of 56.4% over the past decade .

The most common type of property sold in the area is semi-detached, making up around 55% of transactions , followed by terraced and detached.

Housing in CF3 6YG is mixed, with 100% of homes being , indicating a diverse residential makeup.

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Property Sales

101 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Detached
🛏️ bed
📐 1216 sq ft
Today
£412,986
streetscan.co.uk estimate
16 Sep 2024
£402,500
31 Aug 2018
£324,995
More details

103 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Detached
🛏️ bed
📐 1216 sq ft
Today
£399,636
streetscan.co.uk estimate
29 Jun 2018
£296,995
More details

105 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Terraced
🛏️ bed
📐 635 sq ft
Today
£260,345
streetscan.co.uk estimate
29 Jun 2018
£184,995
More details

107 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Terraced
🛏️ bed
📐 635 sq ft
Today
£260,345
streetscan.co.uk estimate
29 Jun 2018
£184,995
More details

109 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Terraced
🛏️ bed
📐 764 sq ft
Today
£301,706
streetscan.co.uk estimate
10 Sep 2021
£255,000
28 Sep 2018
£216,000
More details

111 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Terraced
🛏️ bed
📐 764 sq ft
Today
£306,786
streetscan.co.uk estimate
29 Jun 2018
£217,995
More details

113 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Terraced
🛏️ bed
📐 635 sq ft
Today
£234,401
streetscan.co.uk estimate
26 Mar 2021
£190,000
19 Nov 2018
£178,995
More details

115 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Terraced
🛏️ bed
📐 635 sq ft
Today
£245,691
streetscan.co.uk estimate
8 Jul 2022
£227,500
29 Jun 2018
£189,995
More details

117 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Terraced
🛏️ bed
📐 764 sq ft
Today
£291,423
streetscan.co.uk estimate
26 Sep 2025
£287,500
31 Mar 2021
£232,000
View +1 more
More details

119 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Terraced
🛏️ bed
📐 635 sq ft
Today
£230,455
streetscan.co.uk estimate
9 Jul 2021
£195,000
28 Sep 2018
£176,500
More details

121 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Terraced
🛏️ bed
📐 635 sq ft
Today
£230,181
streetscan.co.uk estimate
12 Jul 2024
£220,000
1 Apr 2021
£193,000
View +1 more
More details

123 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Terraced
🛏️ bed
📐 764 sq ft
Today
£309,601
streetscan.co.uk estimate
29 Jun 2018
£219,995
More details

125 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1066 sq ft
Today
£353,438
streetscan.co.uk estimate
29 Jun 2018
£254,995
More details

127 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1066 sq ft
Today
£353,438
streetscan.co.uk estimate
29 Jun 2018
£254,995
More details

129 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Detached
🛏️ bed
📐 1216 sq ft
Today
£406,154
streetscan.co.uk estimate
26 Feb 2021
£330,000
31 May 2019
£309,995
More details

131 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Detached
🛏️ bed
📐 1216 sq ft
Today
£394,352
streetscan.co.uk estimate
10 Jun 2019
£300,000
More details

133 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Detached
🛏️ bed
📐 969 sq ft
Today
£363,102
streetscan.co.uk estimate
20 Dec 2018
£278,000
More details

137 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Detached
🛏️ bed
📐 1001 sq ft
Today
£371,291
streetscan.co.uk estimate
26 Oct 2018
£284,995
More details

139 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 635 sq ft
Today
£257,239
streetscan.co.uk estimate
16 Jan 2026
£255,000
28 Oct 2022
£248,000
View +1 more
More details

141 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 635 sq ft
Today
£256,468
streetscan.co.uk estimate
26 Oct 2018
£189,995
More details

143 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Terraced
🛏️ bed
📐 635 sq ft
Today
£268,350
streetscan.co.uk estimate
27 Jan 2022
£233,000
16 Nov 2018
£189,995
More details

145 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Terraced
🛏️ bed
📐 635 sq ft
Today
£243,579
streetscan.co.uk estimate
30 Oct 2018
£178,000
More details

147 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Terraced
🛏️ bed
📐 635 sq ft
Today
£259,993
streetscan.co.uk estimate
29 Oct 2018
£189,995
More details

149 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1066 sq ft
Today
£338,794
streetscan.co.uk estimate
9 Nov 2018
£250,000
More details

151 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1066 sq ft
Today
£335,700
streetscan.co.uk estimate
28 Jul 2022
£312,000
28 Feb 2019
£254,995
More details

153 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Detached
🛏️ bed
📐 1098 sq ft
Today
£398,361
streetscan.co.uk estimate
9 Nov 2018
£304,995
More details

155 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Detached
🛏️ bed
📐 1098 sq ft
Today
£397,347
streetscan.co.uk estimate
29 Oct 2018
£304,995
More details

157 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1066 sq ft
Today
£312,963
streetscan.co.uk estimate
30 Jun 2021
£259,995
More details

159 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1066 sq ft
Today
£312,963
streetscan.co.uk estimate
30 Jun 2021
£259,995
More details

161 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 764 sq ft
Today
£276,851
streetscan.co.uk estimate
30 Jun 2021
£229,995
More details

163 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 764 sq ft
Today
£276,851
streetscan.co.uk estimate
30 Jun 2021
£229,995
More details

165 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1012 sq ft
Today
£286,492
streetscan.co.uk estimate
6 Dec 2019
£219,995
More details

167 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1012 sq ft
Today
£284,776
streetscan.co.uk estimate
27 Mar 2020
£213,995
More details

169 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 764 sq ft
Today
£286,492
streetscan.co.uk estimate
19 Dec 2019
£219,995
More details

171 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 764 sq ft
Today
£307,433
streetscan.co.uk estimate
25 Nov 2022
£300,000
19 Dec 2019
£219,995
More details

173 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1012 sq ft
Today
£280,688
streetscan.co.uk estimate
31 Jul 2020
£214,995
More details

175 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1012 sq ft
Today
£274,047
streetscan.co.uk estimate
26 Apr 2024
£260,000
3 Sep 2020
£214,995
More details

177 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1012 sq ft
Today
£291,641
streetscan.co.uk estimate
26 Mar 2024
£275,000
31 Jul 2020
£214,995
More details

179 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1012 sq ft
Today
£298,072
streetscan.co.uk estimate
24 Jul 2025
£290,000
29 Jun 2020
£214,995
More details

181 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1066 sq ft
Today
£328,295
streetscan.co.uk estimate
14 Feb 2025
£317,500
20 Mar 2020
£250,000
More details

183 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1066 sq ft
Today
£325,111
streetscan.co.uk estimate
23 Oct 2020
£254,995
More details

185 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1012 sq ft
Today
£268,571
streetscan.co.uk estimate
31 Oct 2024
£260,000
26 Apr 2024
£260,000
View +1 more
More details

187 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1012 sq ft
Today
£273,736
streetscan.co.uk estimate
7 Oct 2024
£265,000
31 Jul 2020
£217,995
More details

189 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Detached
🛏️ bed
📐 1216 sq ft
Today
£380,198
streetscan.co.uk estimate
13 Dec 2019
£300,000
More details

191 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1012 sq ft
Today
£281,407
streetscan.co.uk estimate
28 Aug 2020
£217,995
More details

193 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1012 sq ft
Today
£292,932
streetscan.co.uk estimate
18 Jul 2025
£285,000
31 Jul 2020
£217,995
More details

195 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1012 sq ft
Today
£283,888
streetscan.co.uk estimate
20 Dec 2019
£217,995
More details

197 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1012 sq ft
Today
£294,985
streetscan.co.uk estimate
16 Dec 2024
£285,000
20 Dec 2019
£219,995
More details

199 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1066 sq ft
Today
£304,374
streetscan.co.uk estimate
13 May 2023
£289,950
29 May 2020
£254,995
More details

201 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1066 sq ft
Today
£334,600
streetscan.co.uk estimate
26 Jun 2020
£254,995
More details

91 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1066 sq ft
Today
£358,240
streetscan.co.uk estimate
27 Apr 2018
£254,995
More details

93 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Semi-detached
🛏️ bed
📐 1066 sq ft
Today
£316,804
streetscan.co.uk estimate
21 May 2025
£307,000
29 Jun 2018
£250,000
More details

95 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Detached
🛏️ bed
📐 1001 sq ft
Today
£371,655
streetscan.co.uk estimate
30 Nov 2023
£357,500
29 Mar 2019
£265,000
More details

97 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Detached
🛏️ bed
📐 1216 sq ft
Today
£390,840
streetscan.co.uk estimate
26 Oct 2018
£300,000
More details

99 Mortimer Avenue, Old St Mellons, Cardiff, CF3 6YG

🏠 Detached
🛏️ bed
📐 1216 sq ft
Today
£400,689
streetscan.co.uk estimate
25 May 2018
£296,995
More details

Area Insights

Data Sources

Properties at CF3 6YG appear eighty-two times in the Land Registry records, with the latest transaction recorded on 16 Jan 2026. It also has fifty-five Energy Performance Certificates (EPC) entries, the earliest dating back to 19 Nov 2019. We use this data, to estimate the property's characteristics and current market value.

This website uses public sector information from:

These datasets are licensed under the Open Government Licence v3.0.
This website is not affiliated with or endorsed by HM Land Registry or DLUHC.

Disclaimer: StreetScan.co.uk makes all reasonable efforts to ensure the information provided on this website is current and accurate; however, no warranties or representations are made as to its completeness or accuracy. StreetScan.co.uk expressly disclaims any and all liability for any loss, damage, or expense arising directly or indirectly from the use of, or reliance upon, such information.