21 Maes Y Ffynnon, Bonvilston, Cardiff, CF5 6TT
About 21 Maes Y Ffynnon
21 Maes Y Ffynnon is a three-bedroom mid-terrace house in Bonvilston, Cardiff, Cardiff (CF5 6TT). It has a recorded floor area of 104 m² (around 1116 sq ft), construction records dating it to 1930-1949 and council tax band E. The latest certificate (October 2010) shows a D (score 64), on the cusp of jumping into the C band. Earlier certificates rated it C (November 2008); the latest reading is one band lower. The recommended improvements would push it to C (score 69). The latest certificate is from October 2010, so improvements made since then won't be reflected.
It hasn't traded since November 2010, a hold of 16 years that's notably long for the area. Across the public record there are 4 sales, relatively high churn for a single property. Across 1999–2010, sale prices on this property compounded at 8.4% per year. Today's modelled estimate of £317,000 sits 62.6% above the 2010 sale of £195,000. On a £-per-square-foot basis, the last sale (£175/sq ft) was about 19.7% below the postcode norm. One planning record on file: an extension approved in 2011. Past consents include an extension, meaningful when judging how the property has evolved.
What this property has
Inside
- Bedrooms3
Energy performance
21 Maes Y Ffynnon's EPC is over a decade old — improvements since won't be reflected.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 14 Oct 2020
EPC Rating
Certificate validity
Expired on 14 October 2020
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Planning history
21 Maes Y Ffynnon has an approved single-storey rear extension on the planning record.
1 application on record at 21 Maes Y Ffynnon, Bonvilston, Cardiff, CF5 6TT
- May 2011ExtensionFullOutcome in report
Extension: Single storey · Rear of property
Single storey rear extension
- Documents
- 6 docs on file
- Reference
- 2011/00260/FUL
Unlock 21 Maes Y Ffynnon, Bonvilston, Cardiff, CF5 6TT's full planning history
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- Every decision — granted, refused or withdrawn (1 on record)
- All 1 application on this property in full, plus 1 notable nearby
- The 6 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
21 Maes Y Ffynnon has more than doubled in price since the earliest registered sale in 1999.
£317,000
Modelled from EPC, postcode comparables and a sale-price growth of 8.4% per year over 11 years.
£195,000
Growth on file: 8.4% per year over 11 years.
Sales timeline
19 November 2010Most recent
£195,000
+14.7%over 3 years13 September 2007
£170,000
+9.0%18 June 2007
£156,000
+95.0%over 7 years28 October 1999
£80,000
Median price across the last 5 sales in CF5 6TT: £335,000 (2025–2023).
Nearby sales in CF5 6TT
5 Maes Y Ffynnon, Bonvilston, Cardiff, CF5 6TT
Sold Jul 2025
£335,0001 Maes Y Ffynnon, Bonvilston, Cardiff, CF5 6TT
Sold Sept 2024
£350,00019 Maes Y Ffynnon, Bonvilston, Cardiff, CF5 6TT
Sold Jul 2024
£260,00010 Maes Y Ffynnon, Bonvilston, Cardiff, CF5 6TT
Sold Jul 2024
£320,00011 Maes Y Ffynnon, Bonvilston, Cardiff, CF5 6TT
Sold Aug 2023
£405,000
Versus other Maes Y Ffynnon homes
Years Held for 21 Maes Y Ffynnon runs comfortably ahead of the street norm.
Price per m²
£1,880
Street avg £2,850
Floor Area
104 m²
Street avg 102 m²
Habitable Rooms
5 rooms
Street avg 6 rooms
CO₂ Emissions
4.2 t/year
Street avg 4.3 t/year
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The neighbourhood at a glance
Crime
426/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Maes-y-Ffynon — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







