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Gwynedd property data: prices, flood risk & energy ratings

Gwynedd has 31,941 recorded homes. 11.52% of recorded homes with a reading have medium or high mapped surface-water likelihood on the surrounding land.

Average house price

£203,555

Rank 270 of 317 (highest first)

1,403 sales in the 12 months to Jun 2026.

UK HPI · Aug 2026

Annual house price change

+4.10%

Rank 41 of 317 (highest first)

Change from the same month a year earlier.

UK HPI · Aug 2026

Medium / high surface-water map bands around homes

11.52%

Rank 8 of 22 (highest first) · in Wales

2,085 / 18,098 homes with a reading

Natural Resources Wales · May 2026

EPC E–G ratings

43.38%

Rank 2 of 318 (highest first)

8,283 / 19,095 homes with a rating

EPC · Nov 2026

These figures cover recorded homes with known facts, not every dwelling; mapped land risk is not a history of indoor flooding, old EPCs may have expired, and an area price is not a home valuation.

Postcode districts with the highest surface-water shares

Homes within Gwynedd
DistrictMedium / highKnown homes
LL4127.07%288 / 1,064
LL3523.72%74 / 312
SY2019.29%49 / 254
LL4216.86%57 / 338
LL4315.79%18 / 114
LL5215.50%71 / 458
LL4015.40%93 / 604
LL5414.04%224 / 1,595

Natural Resources Wales · May 2026

Postcode districts with the highest EPC E–G shares

Homes within Gwynedd
DistrictEPC E–GKnown ratings
SY2079.09%208 / 263
LL3773.61%106 / 144
LL4471.50%138 / 193
LL4768.14%77 / 113
LL3867.25%154 / 229
LL4363.16%72 / 114
LL4660.55%287 / 474
LL5360.12%1,622 / 2,698

EPC · Nov 2026

Checked · Sources