17 Heol Y Castell, Ely, Cardiff, CF5 5LR
About 17 Heol Y Castell
17 Heol Y Castell is a semi-detached house in Ely, Cardiff, Cardiff (CF5 5LR). It has a recorded floor area of 43 m² (around 463 sq ft), construction records dating it to 1950-1966 and council tax band A. At 43 m² this is the 8th smallest of 34 units on EPC record in the building, where floor areas span 36–363 m². The building's EPC ratings span F to C, with this unit at the top. The latest certificate (February 2026) shows a C (score 75), near the top of the C band. The rating has held steady at C across 3 certificates since February 2011. Between certificates, roof efficiency went from Average to Good and lighting went from Poor to Good; while window efficiency dropped from Average to Poor and hot-water efficiency dropped from Very Good to Good. This certificate was lodged in the last six months, so the rating reflects current condition.
At 43 m² it sits well below the postcode median (67 m² across 33 EPCs), making it one of the more compact homes locally.
Everything you need to know about 17 Heol Y Castell
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Energy performance
17 Heol Y Castell's carbon output is low for the local stock.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Hot water efficiency decreased
More low energy lighting installed
Heating controls upgraded for better temperature management
Roof insulation improved
More low energy lighting installed
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Planning history
17 Heol Y Castell 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
17 Heol Y Castell has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£112,000
Modelled from EPC, postcode comparables.
No sales recorded with HM Land Registry
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
Median price across the last 5 sales in CF5 5LR: £115,000 (2023–2014).
Nearby sales in CF5 5LR
61 Heol Y Castell, Ely, Cardiff, CF5 5LR
Sold Mar 2023
£240,00045 Heol Y Castell, Ely, Cardiff, CF5 5LR
Sold Jan 2019
£115,00055 Heol Y Castell, Ely, Cardiff, CF5 5LR
Sold May 2017
£106,50049 Heol Y Castell, Ely, Cardiff, CF5 5LR
Sold Mar 2017
£107,50053 Heol Y Castell, Ely, Cardiff, CF5 5LR
Sold Jul 2014
£133,000
Versus other Heol Y Castell homes
On co₂ emissions, 17 Heol Y Castell stands well clear of the street.
EPC Rating
75 (C)
Street avg 73 (C)
Floor Area
43 m²
Street avg 42 m²
CO₂ Emissions
1.2 t/year
Street avg 1.5 t/year
Habitable Rooms
2 rooms
Street avg 2 rooms
Everything you need to know about 17 Heol Y Castell
The true value, the hidden risks and the full sale history, in one report.
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Similar properties nearby
The neighbourhood at a glance
Crime
6/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Heol-y-Gaer — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.