21 Caernarvon Way, Rumney, Cardiff, CF3 1RW
About 21 Caernarvon Way
21 Caernarvon Way is a semi-detached house in Rumney, Cardiff, Cardiff (CF3 1RW). It has a recorded floor area of 88 m² (around 947 sq ft), construction records dating it to 1967-1975 and council tax band C. The latest certificate (April 2015) shows an E (score 42), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 74), a 2-band jump. The latest certificate is from April 2015, so improvements made since then won't be reflected.
Untraded for 30 years, with the last transfer in March 1996. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £198,000 sits 360.5% above the 1996 sale of £43,000. On a £-per-square-foot basis, the last sale (£45/sq ft) was about 56% below the postcode norm.
Energy performance
21 Caernarvon Way sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 07 Apr 2025
EPC Rating
Certificate validity
Expired on 7 April 2025
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Planning history
21 Caernarvon Way has no planning applications on record.
A planning report still maps activity across the surrounding area and reads this property's extension & conversion potential.
Sales history & valuation
21 Caernarvon Way's modelled value sits at over four times its earliest registered sale price (1996).
£198,000
Modelled from EPC, postcode comparables.
£43,000
Recorded with HM Land Registry.
Sales timeline
15 March 1996Most recent
£43,000
Median price across the last 5 sales in CF3 1RW: £177,000 (2026–2022).
Nearby sales in CF3 1RW
23 Caernarvon Way, Rumney, Cardiff, CF3 1RW
Sold Jan 2026
£247,50085 Caernarvon Way, Rumney, Cardiff, CF3 1RW
Sold Apr 2025
£115,00089 Caernarvon Way, Rumney, Cardiff, CF3 1RW
Sold Jun 2023
£177,00039 Caernarvon Way, Rumney, Cardiff, CF3 1RW
Sold Oct 2022
£93,00069 Caernarvon Way, Rumney, Cardiff, CF3 1RW
Sold Jul 2020
£181,500
Versus other Caernarvon Way homes
On years held, 21 Caernarvon Way stands well clear of the street.
Price per m²
£489
Street avg £1,231
Floor Area
88 m²
Street avg 95 m²
Habitable Rooms
5 rooms
Street avg 6 rooms
CO₂ Emissions
6.6 t/year
Street avg 3.6 t/year
Similar properties nearby
The neighbourhood at a glance
Crime
242/mo
Falling year-on-year across the wider district.
Nearest stop
0.1 km
Trowbridge Road — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







