Areas/Postcode districts/SY21
Postcode district
SY21
5,340 domestic properties carry a SY21 postcode. Postcode districts don't line up with council boundaries — SY21 spans Powys and Shropshire, and this page counts all of them honestly rather than filing it under one authority.
5,340properties matched to a UPRN
63%rated D or below on their current EPC
Dmost common current energy band
2local authorities represented here
Energy performance
Where the stock sits today
SY21's current EPC mix, read directly from the certificates. Powys 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 3%
B 7%
C 26%
D 32%
E 19%
F 8%
G 4%
Distance from standard
59.9→82.0
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
5,340
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. Powys 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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359properties in flood zone 2 or 3
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599properties in a designated conservation area
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5,318properties 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.
17.0%households in fuel poverty (WHCS 2017-18 estimate)
16%of homes are social rented (Census 2021)
This is Powys's own local-authority figure, inherited — the source data (2017-18) has no finer grain than a whole council area, so every property in Powys 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 SY21 →UPRN 100023...EPC D → C
UPRN 100023...Flood zone 1
UPRN 100023...Conservation area
UPRN 100023...EPC E → D
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Other SY postcode districts
25 published