7 St Mellons Road, Marshfield, Cardiff, CF3 2TX
About 7 St Mellons Road
7 St Mellons Road is a detached house in Marshfield, Cardiff, Cardiff (CF3 2TX). It has a recorded floor area of 303 m² (around 3261 sq ft), construction records dating it to 2007 onwards and council tax band F. The latest certificate (July 2014) shows a C (score 76), near the top of the C band. When first surveyed in June 2009 the rating was E, the property has climbed 2 bands since. Between certificates, wall efficiency went from Good to Very Good, roof efficiency went from Average to Good and window efficiency went from Average to Good. The latest certificate is from July 2014, so improvements made since then won't be reflected.
Untraded for 17 years, with the last transfer in August 2009. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. At 303 m² the property is well over the postcode median (114 m² across 23 EPCs), placing it in the larger end of the local stock. Today's modelled estimate of £645,000 sits 180.4% above the 2009 sale of £230,000. On a £-per-square-foot basis, the last sale (£71/sq ft) was about 70.8% below the postcode norm. One planning record on file: an extension approved in 2009. Past consents include an extension, meaningful when judging how the property has evolved.
Energy performance
7 St Mellons Road's carbon output runs well above what efficient homes in the postcode produce.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 27 Jul 2024
EPC Rating
Property Improvements
Changes detected from historical EPC data
Hot water system upgraded
Windows upgraded, improving insulation
Loft insulation upgraded to recommended levels
Floor insulation added or improved
More low energy lighting installed
Get a survey for this property
Level 3 Building Survey
Because the property is a large detached home over 300m², we believe a Level 3 building survey should be considered.
From £1,155 · Includes VAT
Planning history
7 St Mellons Road has an approved extension on the planning record.
1 application on record at 7 St Mellons Road, Marshfield, Cardiff, CF3 2TX
- Nov 2009ExtensionFullOutcome in report
ERECTION OF SINGLE STOREY EXTENSIONS TO FRONT, SIDE AND REAR OF PROPERTY, RAISING OF ROOF HEIGHT AND INSTALLATION OF DORMER TO REAR
- Documents
- 10 docs on file
- Reference
- 09/0963
Unlock 7 St Mellons Road, Marshfield, Cardiff, CF3 2TX's full planning history
You're seeing the shape of it. The report has the substance.
- Every decision — granted, refused or withdrawn (1 on record)
- All 1 application on this property in full, plus 1 notable nearby
- The 10 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
The latest sale fell during the post-2008 dip, often a low-water mark in price comparisons.
£645,000
Modelled from EPC, postcode comparables.
£230,000
Recorded with HM Land Registry.
Sales timeline
20 August 2009Most recent
£230,000
Median price across the last 5 sales in CF3 2TX: £507,500 (2025–2023).
Nearby sales in CF3 2TX
18 St Mellons Road, Marshfield, Cardiff, CF3 2TX
Sold Jul 2025
£295,00015a, St Mellons Road, Marshfield, Cardiff, CF3 2TX
Sold May 2025
£515,00023 St Mellons Road, Marshfield, Cardiff, CF3 2TX
Sold Nov 2024
£507,50021 St Mellons Road, Marshfield, Cardiff, CF3 2TX
Sold Jan 2024
£495,00025 St Mellons Road, Marshfield, Cardiff, CF3 2TX
Sold Aug 2023
£515,000
Versus other St Mellons Road homes
7 St Mellons Road outperforms the street on floor area by a wide margin.
Price per m²
£759
Street avg £2,666
Floor Area
303 m²
Street avg 134 m²
Habitable Rooms
7 rooms
Street avg 6 rooms
CO₂ Emissions
6.7 t/year
Street avg 4.3 t/year
Similar properties nearby
1 Clos Medwy, St Mellons
CF3 2AD
1 Church Close, Peterstone Wentlooge
CF3 2TP
1 Marshfield Road, Castleton
CF3 2UU
1 Clos Elphan, St Mellons
CF3 2AE
1 Clos Padrig, St Mellons
CF3 2AF
1 Cambrian Crescent, Marshfield
CF3 2TD
1 Cambrian Grove, Marshfield
CF3 2US
1 Groes Fawr Close, Marshfield
CF3 2AH
The neighbourhood at a glance
Reported crime in the wider district is trending notably upward year-on-year.
Crime
3/mo
Rising year-on-year across the wider district.
Nearest stop
0.3 km
Oakfields — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







