18 Duncan Close, St Mellons, Cardiff, CF3 1NP
About 18 Duncan Close
18 Duncan Close is a two-bedroom semi-detached house in St. Mellons, Cardiff, Cardiff (CF3 1NP). It has a recorded floor area of 68 m² (around 732 sq ft), construction records dating it to 1983-1990 and council tax band D. The latest certificate (August 2012) shows a D (score 63), on the cusp of jumping into the C band. The recommended improvements would lift it to B (score 86), a 2-band jump. The latest certificate is from August 2012, so improvements made since then won't be reflected. Other recorded features include a conservatory.
Across 1996–2014, sale prices on this property compounded at 6.4% per year. Today's modelled estimate of £236,000 sits 62.2% above the 2014 sale of £145,500. It lags the bulk of the postcode on energy efficiency (less efficient than 82% of similar EPCs). Last sold in February 2014, so it's been off the market for around 12 years.
What this property has
Inside
- Bedrooms2
- Bathrooms1
- ConservatoryYes
Outside
- Private gardenRear
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 27 Aug 2022
EPC Rating
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Planning history
18 Duncan 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
18 Duncan Close has more than doubled in price since the earliest registered sale in 1996.
£236,000
Modelled from EPC, postcode comparables and a sale-price growth of 6.4% per year over 17 years.
£145,500
Growth on file: 6.4% per year over 17 years.
Sales timeline
28 February 2014Most recent
£145,500
+193.9%over 17 years22 November 1996
£49,500
Median price across the last 5 sales in CF3 1NP: £245,000 (2025–2024).
Nearby sales in CF3 1NP
1 Duncan Close, St Mellons, Cardiff, CF3 1NP
Sold Oct 2025
£240,0002 Duncan Close, St Mellons, Cardiff, CF3 1NP
Sold Aug 2025
£250,00023 Duncan Close, St Mellons, Cardiff, CF3 1NP
Sold Aug 2025
£245,00010 Duncan Close, St Mellons, Cardiff, CF3 1NP
Sold Jul 2025
£265,00019 Duncan Close, St Mellons, Cardiff, CF3 1NP
Sold Sept 2024
£212,500
Versus other Duncan Close homes
On years held, 18 Duncan Close stands well clear of the street.
Price per m²
£2,140
Street avg £2,867
Floor Area
68 m²
Street avg 65 m²
Habitable Rooms
5 rooms
Street avg 4 rooms
CO₂ Emissions
2.9 t/year
Street avg 2.2 t/year
Similar properties nearby
1 Canopus Close, St Mellons
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1 Duncan Close, St Mellons
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1 Meadvale Court, Meadvale Road
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1 Abergele Road, Rumney
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1 Llanina Grove, Rumney
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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
0.1 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.







