Areas/Postcode districts/CF23
Postcode district
CF23
13,037 domestic properties carry a CF23 postcode, all within Cardiff.
13,037properties matched to a UPRN
48%rated D or below on their current EPC
Cmost common current energy band
1local authority
Energy performance
Where the stock sits today
CF23's current EPC mix, read directly from the certificates.
A 1%
B 6%
C 46%
D 38%
E 9%
F 1%
G 0%
Distance from standard
67.4→80.7
Average current efficiency score against average potential score, on the certificate's own SAP scale. The gap is what a certificate's own recommendations are already aimed at closing — a reading of the certificates as issued, not a projection.
Properties matched
13,037
Matched to a UPRN in the current release, out of a national total of 19,274,677.
Flood, heritage & conservation
Constraints on the ground
Three separate checks, kept separate on purpose — a property can sit in more than one at once.
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945properties in flood zone 2 or 3
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919properties in a designated conservation area
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13,036properties within roughly 2.2km of a listed building
A proximity signal, not a listed-status check — this counts nearby listed buildings, not properties confirmed to be listed themselves.
Deprivation & fuel poverty
Neighbourhood context, Wales-wide
The Welsh Index of Multiple Deprivation ranks every small area in Wales nationally, from 1 (most deprived) to 10 (least) — not directly comparable to England's own index, which uses different domains and weights.
9.0%households in fuel poverty (WHCS 2017-18 estimate)
13%of homes are social rented (Census 2021)
This is Cardiff's own local-authority figure, inherited — the source data (2017-18) has no finer grain than a whole council area, so every property in Cardiff reads the same number.
CF23 doesn't have its own articles, but we've written an article covering Cardiff.Read about Cardiff →
This is the aggregate picture. Every property behind it has its own record.
Certificate history, exact flood zone, planning constraints, deprivation and tenure — matched to the UPRN and searchable one property at a time inside CrierData.
Search properties in CF23 →UPRN 100023...EPC D → C
UPRN 100023...Flood zone 1
UPRN 100023...Conservation area
UPRN 100023...EPC E → D
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Other CF postcode districts
35 published