21 Clare Street, Cardiff, CF11 6BD
About 21 Clare Street
21 Clare Street is a mid-terrace house in Cardiff (CF11 6BD). It has a recorded floor area of 165 m² (around 1776 sq ft), construction records dating it to 1900-1929 and council tax band F. The latest certificate (February 2025) shows a D (score 61), on the cusp of jumping into the C band. The rating has held steady at D across 3 certificates since December 2012. Between certificates, roof efficiency went from Very Poor to Average and lighting went from Good to Very Good. The recommended improvements would lift it to B (score 82), a 2-band jump.
At 165 m² the property is well over the postcode median (54 m² across 20 EPCs), placing it in the larger end of the local stock. One planning record on file: an extension approved in 2019. Past consents include an extension, meaningful when judging how the property has evolved.
Everything you need to know about 21 Clare Street
The true value, the hidden risks and the full sale history, in one report.
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Energy performance
21 Clare Street's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Certificate validity
Valid until 22 February 2035
Property Improvements
Changes detected from historical EPC data
Roof insulation improved
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919 and has been extended more than once, we believe a Level 3 building survey should be considered.
From £955 · Includes VAT
Planning history
1 application on record at 21 Clare Street, Cardiff, CF11 6BD
- May 2019ExtensionFullOutcome in report
Extension: Rear of property
GROUND AND FIRST FLOOR EXTENSIONS WITH REAR / SIDE DORMER PLUS INTERNAL ALTERATIONS TO EXISTING SUI GENERIS HOUSE IN MULTIPLE OCCUPATION
- Documents
- 14 docs on file
- Reference
- 19/00471/DCH
Unlock 21 Clare Street, Cardiff, CF11 6BD's full planning history
You're seeing the shape of it. The report has the substance.
- Every decision — granted, refused or withdrawn (1 on record)
- All 1 application on this property in full, plus 10 notable nearby
- The 14 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
21 Clare Street has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£350,000
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 CF11 6BD: £85,000 (2025–2018).
Nearby sales in CF11 6BD
23 Clare Street, Cardiff, CF11 6BD
Sold Sept 2025
£455,000Flat 3, 39 Clare Street, Cardiff, CF11 6BD
Sold Apr 2018
£65,000Flat 2, 39 Clare Street, Cardiff, CF11 6BD
Sold Apr 2018
£85,000Flat 1, 39 Clare Street, Cardiff, CF11 6BD
Sold Apr 2018
£85,000Flat 4, 39 Clare Street, Cardiff, CF11 6BD
Sold Apr 2018
£65,000
Versus other Clare Street homes
21 Clare Street outperforms the street on epc rating by a wide margin.
EPC Rating
61 (D)
Street avg 52 (E)
Floor Area
165 m²
Street avg 137 m²
CO₂ Emissions
6.8 t/year
Street avg 6.7 t/year
Habitable Rooms
10 rooms
Street avg 6 rooms
Everything you need to know about 21 Clare Street
The true value, the hidden risks and the full sale history, in one report.
Pick your report · from £14.99
One time fee only - money back guarantee
The data behind every report
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The neighbourhood at a glance
Crime
362/mo
Steady year-on-year across the wider district.
Nearest stop
0.0 km
Clare Street — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.