Areas/Postcode districts/LL21
Postcode district
LL21
1,924 domestic properties carry a LL21 postcode. Postcode districts don't line up with council boundaries — LL21 spans Denbighshire, Conwy and Gwynedd, and this page counts all of them honestly rather than filing it under one authority.
Denbighshire 76%
Conwy 22%
Gwynedd 3%
1,924properties matched to a UPRN
77%rated D or below on their current EPC
Dmost common current energy band
3local authorities represented here
Energy performance
Where the stock sits today
LL21's current EPC mix, read directly from the certificates. Denbighshire and the other authorities here have different profiles — the figures below are this district's blended total across all of them, not any single authority's own number.
A 1%
B 5%
C 17%
D 27%
E 25%
F 17%
G 8%
Distance from standard
51.8→82.2
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
1,924
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. Denbighshire and the other authorities here have different profiles — the figures below are this district's blended total across all of them, not any single authority's own number.
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196properties in flood zone 2 or 3
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168properties in a designated conservation area
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1,912properties 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.
12.3%households in fuel poverty (WHCS 2017-18 estimate)
13%of homes are social rented (Census 2021)
This is Denbighshire's own local-authority figure, inherited — the source data (2017-18) has no finer grain than a whole council area, so every property in Denbighshire reads the same number.
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 LL21 →UPRN 100023...EPC D → C
UPRN 100023...Flood zone 1
UPRN 100023...Conservation area
UPRN 100023...EPC E → D
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Other LL postcode districts
67 published