Areas/Postcode districts/LL37
Postcode district
LL37
211 domestic properties carry a LL37 postcode, all within Gwynedd.
211properties matched to a UPRN
88%rated D or below on their current EPC
Emost common current energy band
1local authority
Energy performance
Where the stock sits today
LL37's current EPC mix, read directly from the certificates.
A 1%
B 2%
C 8%
D 22%
E 34%
F 22%
G 10%
Distance from standard
46.7→78.0
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
211
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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73properties in flood zone 2 or 3
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0properties in a designated conservation area
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211properties 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.
23.0%households in fuel poverty (WHCS 2017-18 estimate)
8%of homes are social rented (Census 2021)
This is Gwynedd's own local-authority figure, inherited — the source data (2017-18) has no finer grain than a whole council area, so every property in Gwynedd reads the same number.
LL37 doesn't have its own articles, but we've written an article covering Gwynedd.Read about Gwynedd →
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 LL37 →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