18 Colwyn Road, Rumney, Cardiff, CF3 3JS
About 18 Colwyn Road
18 Colwyn Road is a three-bedroom semi-detached house in Rumney, Cardiff, Cardiff (CF3 3JS). It has a recorded floor area of 138 m² (around 1485 sq ft), construction records dating it to 1967-1975 and council tax band C. The latest certificate (November 2019) shows a D (score 62), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 77). Other recorded features include notable views. Our model identifies extension potential, subject to local planning policy. The home occupies a corner plot.
At 138 m² the property is well over the postcode median (86 m² across 17 EPCs), placing it in the larger end of the local stock. Across 2012–2021, sale prices on this property compounded at 7.2% per year. Today's modelled estimate of £286,000 is 24.3% above the 2021 sale price. Most recent transfer: April 2021 at £230,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
What this property has
Inside
- Bedrooms3
- Bathrooms1
- Open-plan layoutYes
Outside
- Private gardenYes
- Notable viewsYes
- Corner plotYes
Building
- Extension potentialPossible
Energy performance
EPC Rating
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Planning history
18 Colwyn Road 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
The latest sale landed in the post-pandemic price surge — useful context when reading the figure.
£286,000
Modelled from EPC, postcode comparables and a sale-price growth of 7.2% per year over 9 years.
£230,000
Growth on file: 7.2% per year over 9 years.
Sales timeline
15 April 2021Most recent
£230,000
+84.0%over 8 years28 June 2012
£125,000
Median price across the last 5 sales in CF3 3JS: £251,000 (2025–2018).
Nearby sales in CF3 3JS
10 Colwyn Road, Rumney, Cardiff, CF3 3JS
Sold Jun 2025
£251,00011 Colwyn Road, Rumney, Cardiff, CF3 3JS
Sold Dec 2024
£295,00019 Colwyn Road, Rumney, Cardiff, CF3 3JS
Sold Dec 2022
£360,0004 Colwyn Road, Rumney, Cardiff, CF3 3JS
Sold Oct 2021
£165,0008 Colwyn Road, Rumney, Cardiff, CF3 3JS
Sold Nov 2018
£189,450
Versus other Colwyn Road homes
On floor area, 18 Colwyn Road stands well clear of the street.
Price per m²
£1,667
Street avg £2,105
Floor Area
138 m²
Street avg 92 m²
Habitable Rooms
6 rooms
Street avg 5 rooms
CO₂ Emissions
5.7 t/year
Street avg 3.4 t/year
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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
Manorbier Cres — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







