17 Clos Derwen, Cardiff, CF23 5HJ
About 17 Clos Derwen
17 Clos Derwen is a four-bedroom detached house in Cardiff (CF23 5HJ). It has a recorded floor area of 127 m² (around 1367 sq ft), construction records dating it to 1996-2002 and council tax band G. The latest certificate (April 2012) shows a D (score 64), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 79). The latest certificate is from April 2012, so improvements made since then won't be reflected.
Across 2000–2012, sale prices on this property compounded at 4.8% per year. Today's modelled estimate of £579,000 sits 60.8% above the 2012 sale of £360,000. On a £-per-square-foot basis, the last sale (£263/sq ft) was about 22.6% above the typical sold price in the postcode. Last changed hands 14 years ago, in December 2012.
What this property has
Inside
- Bedrooms4
Energy performance
17 Clos Derwen'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This certificate is over 10 years old and is no longer valid.Expired 12 Apr 2022
EPC Rating
Certificate validity
Expired on 12 April 2022
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Planning history
17 Clos Derwen has no planning applications on record.
But the area is active
1 notable application nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
17 Clos Derwen valuation sits well clear of the typical sold price in this postcode.
£579,000
Modelled from EPC, postcode comparables and a sale-price growth of 4.8% per year over 13 years.
£360,000
Growth on file: 4.8% per year over 13 years.
Sales timeline
14 December 2012Most recent
£360,000
+82.8%over 12 years4 February 2000
£196,950
Median price across the last 5 sales in CF23 5HJ: £425,000 (2025–2021).
Versus other Clos Derwen homes
17 Clos Derwen is notably below the street on epc rating.
Price per m²
£2,835
Street avg £3,120
Floor Area
127 m²
Street avg 116 m²
Habitable Rooms
7 rooms
Street avg 6 rooms
CO₂ Emissions
4.7 t/year
Street avg 3.5 t/year
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The neighbourhood at a glance
Crime
169/mo
Falling year-on-year across the wider district.
Nearest stop
0.2 km
Brandreth Rd — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







