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Areas/Wales/Gwynedd
Local authority · Wales

Gwynedd

39,366 domestic properties in Gwynedd are matched to a UPRN in CrierData and checked against six national registers — energy performance, flood zone, heritage constraints, deprivation, and housing tenure. Every figure below is a real count from the current release, not an estimate.

39,366properties matched to a UPRN
71%rated D or below on their current EPC
Dmost common current energy band
65wards, all with published pages
Energy performance

Where the stock sits today

Gwynedd's housing stock, read from its current certificates: 71% of properties sit at band D or lower today. That is a starting point, not a verdict — most of that stock also has a documented route to a higher band, tracked property by property inside the full product.

C
D
E
F
A 2%
B 5%
C 22%
D 33%
E 22%
F 11%
G 5%
Distance from standard
56.7→80.4
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
39,366
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.

〜
5,988
properties in flood zone 2 or 3
▦
3,437
properties in a designated conservation area
⌂
39,342
properties 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)
17%of homes are social rented (Census 2021)
Related reading

More on Gwynedd

Article

Every home in the country is aiming at roughly the same number

Current energy scores vary enormously between local authorities. Potential scores barely vary at all. Once you notice that, the map of British housing looks different.

Read →

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 Gwynedd →
UPRN 100023...EPC D → C
UPRN 100023...Flood zone 1
UPRN 100023...Conservation area
UPRN 100023...EPC E → D
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Wards in Gwynedd

65 published
AberdyfiAbererchAbermawAbersoch gyda LlanenganArllechweddArthog a LlangelynninBethel a'r FelinheliBowydd a'r RhiwBrithdir and Llanfachreth/Ganllwyd/LlanelltydBro DysynniCadnantCanol BangorCanol BethesdaCanol Tref CaernarfonClynnogCorris a MawddwyCricciethCwm-y-gloDe DolgellauDe PwllheliDeiniolenDewiDiffwys a MaenofferenDolbenmaenDwyrain BangorDwyrain PorthmadogDyffryn ArdudwyEfailnewydd a BuanGerlanGlaslynGlyderGogledd DolgellauGogledd PwllheliGorllewin PorthmadogGorllewin TywynHarlech a LlanbedrHendreLlanbedrog gyda MynythoLlanberisLlandderfelLlanllyfniLlanrugLlanuwchllynLlanwndaLlanystumdwyMenaiMorfa Nefyn a ThudweiliogMorfa TywynNefynPebligPen draw LlŷnPen-y-groesPenisa'r-waunPenrhyndeudraethRachubTeiglTrawsfynyddTre-garth a Mynydd LlandygáiTryfanWaunfawrY BalaY BontnewyddY FaenolY GroeslonYr Eifl

Postcode districts in Gwynedd

26 linked
LL21LL23LL33LL35LL36LL37LL38LL39LL40LL41LL42LL43LL44LL45LL46LL47LL48LL49LL51LL52LL53LL54LL55LL56LL57SY20