21 Eider Close, St Mellons, Cardiff, CF3 0DF
About 21 Eider Close
21 Eider Close is a two-bedroom semi-detached house in St. Mellons, Cardiff, Cardiff (CF3 0DF). It has a recorded floor area of 46 m² (around 495 sq ft), construction records dating it to 1983-1990 and council tax band B. At 46 m² this is the 4th smallest of 14 units on EPC record in the building, where floor areas span 37–108 m². The building's EPC ratings span E to C, with this unit at the top. The latest certificate (August 2016) shows a C (score 72). When first surveyed in September 2011 the rating was D, the property has climbed 1 band since. Between certificates, wall efficiency went from Average to Good; while lighting dropped from Average to Poor.
Sold November 2019 for £118,000. Across the public record there are 4 sales, relatively high churn for a single property. Across 1997–2019, sale prices on this property compounded at 7.6% per year. Today's modelled estimate of £145,000 is 22.9% above the 2019 sale price. On a £-per-square-foot basis, the last sale (£238/sq ft) was about 33.6% above the typical sold price in the postcode.
What this property has
Inside
- Bedrooms2
- Bathrooms1
- Open-plan layoutYes
Outside
- Private gardenRear
- ParkingOff road
Building
- RefurbishedYes
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Wall insulation improved
Low energy lighting percentage decreased
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Planning history
21 Eider Close 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
Price for 21 Eider Close has grown more than fourfold since the 1997 starting point.
£145,000
Modelled from EPC, postcode comparables and a sale-price growth of 7.6% per year over 23 years.
£118,000
Growth on file: 7.6% per year over 23 years.
Sales timeline
29 November 2019Most recent
£118,000
+43.9%over 4 years19 October 2015
£82,000
+105.0%over 13 years21 May 2002
£40,000
+81.8%over 5 years14 February 1997
£22,000
Median price across the last 5 sales in CF3 0DF: £185,000 (2024–2022).
Nearby sales in CF3 0DF
13 Eider Close, St Mellons, Cardiff, CF3 0DF
Sold Aug 2024
£237,00032 Eider Close, St Mellons, Cardiff, CF3 0DF
Sold Jun 2024
£169,00016 Eider Close, St Mellons, Cardiff, CF3 0DF
Sold Jul 2023
£96,0004 Eider Close, St Mellons, Cardiff, CF3 0DF
Sold Jul 2022
£285,00015 Eider Close, St Mellons, Cardiff, CF3 0DF
Sold Jun 2022
£185,000
Versus other Eider Close homes
21 Eider Close is notably below the street on floor area.
EPC Rating
72 (C)
Street avg 74 (C)
Floor Area
46 m²
Street avg 48 m²
CO₂ Emissions
1.6 t/year
Street avg 1.6 t/year
Habitable Rooms
2 rooms
Street avg 2 rooms
Similar properties nearby
1 Caraway Close, St Mellons
CF3 0NF
1 Caradoc Close, St Mellons
CF3 0LQ
1 Ashdown Close, St Mellons
CF3 0ER
1 Aster Close, St Mellons
CF3 0JB
1 Chartley Close, St Mellons
CF3 0SD
1 Aspen Close, St Mellons
CF3 0BT
1 Cathcob Close, St Mellons
CF3 0AH
1 Aston Place, St Mellons
CF3 0PH
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
Llaneirwg Way — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







