23 Canopus Close, St Mellons, Cardiff, CF3 1NR
About 23 Canopus Close
23 Canopus Close is a semi-detached house in St. Mellons, Cardiff, Cardiff (CF3 1NR). It has a recorded floor area of 69 m² (around 743 sq ft), construction records dating it to 1976-1982 and council tax band D. The latest certificate (September 2023) shows a C (score 72). The rating has held steady at C across 2 certificates since September 2009. Between certificates, lighting went from Good to Very Good; while wall efficiency dropped from Good to Average and hot-water efficiency dropped from Very Good to Good. The recommended improvements would push it to B (score 90).
Across 2004–2014, sale prices on this property compounded at 1.6% per year. Today's modelled estimate of £252,000 sits 80% above the 2014 sale of £140,000. On a £-per-square-foot basis, the last sale (£188/sq ft) was about 26.8% above the typical sold price in the postcode. Last sold in March 2014, so it's been off the market for around 12 years.
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Hot water efficiency decreased
More low energy lighting installed
Get a survey for this property
Level 2 HomeBuyer Report
We've checked 10 risk factors against the available data for this property and believe a Level 2 HomeBuyer Report could be a suitable option for you.
From £545 · Includes VAT
Planning history
23 Canopus Close 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
23 Canopus Close changed hands twice within eighteen months — unusual for the area.
£252,000
Modelled from EPC, postcode comparables and a sale-price growth of 1.6% per year over 10 years.
£140,000
Growth on file: 1.6% per year over 10 years.
Sales timeline
7 March 2014Most recent
£140,000
2 November 2012
£140,000
+16.7%over 8 years5 May 2004
£120,000
Median price across the last 5 sales in CF3 1NR: £215,000 (2024–2021).
Nearby sales in CF3 1NR
13 Canopus Close, St Mellons, Cardiff, CF3 1NR
Sold Apr 2024
£290,0008 Canopus Close, St Mellons, Cardiff, CF3 1NR
Sold Mar 2023
£233,00024 Canopus Close, St Mellons, Cardiff, CF3 1NR
Sold Jan 2023
£169,00026 Canopus Close, St Mellons, Cardiff, CF3 1NR
Sold Nov 2021
£166,00025 Canopus Close, St Mellons, Cardiff, CF3 1NR
Sold Sept 2021
£215,000
Versus other Canopus Close homes
Habitable Rooms for 23 Canopus Close runs comfortably ahead of the street norm.
Price per m²
£2,029
Street avg £2,249
Floor Area
69 m²
Street avg 70 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
2.2 t/year
Street avg 2.4 t/year
Similar properties nearby
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
0.2 km
Ty Coch Court — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







