Postcode district
LL51
231 domestic properties carry a LL51 postcode, all within Gwynedd.
231properties 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
LL51's current EPC mix, read directly from the certificates.
A 1%
B 3%
C 8%
D 22%
E 32%
F 22%
G 12%
Distance from standard
45.4→79.3
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
231
Matched to a UPRN in the current release, out of a national total of 19,966,636.
Flood, heritage & conservation
Constraints on the ground
Three separate checks, kept separate on purpose — a property can sit in more than one at once.
〜
0properties in flood zone 2 or 3
▦
2properties in a designated conservation area
⌂
228properties 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.
1
2
3
4
5
6
7
8
9
10
Share of properties whose neighbourhood falls in each national WIMD decile.
23.0%households in fuel poverty (WHCS 2017-18 estimate)
13%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.
LL51 doesn't have its own articles, but we've written an article covering Gwynedd.Read about Gwynedd →