LL21 area guide
House prices, recent sales, crime and schools for the LL21 postcode district in Conwy. Free to read, from official open data. For one address in detail, run a full property report.
Conwy · 2026-05 (UK HPI)
Median £240,000
Street-level crime at the district centre
Ofsted rated, within one mile
What the data says about LL21
The average home across Conwy is worth about £213,240 (UK House Price Index, 2026-05), and the median of the 2 most recent Land Registry sales recorded inside LL21 is £240,000, and prices have risen 1.8% over the last year.
Of 98 energy certificates sampled across 12 postcodes in LL21, band D is the most common, and 89.8% of homes sit below band C — the point at which most lenders' green mortgage deals and future rental rules bite.
There are 0 schools rated Good or Outstanding by Ofsted within a mile of LL21 in Conwy.
The district covers the Edeirnion, Efenechdyd, Llandderfel, Llanfair Dyffryn Clwyd Gwyddelwern ward areas.
Sample of 98 energy certificates from 12 postcodes in LL21, taken from the government energy performance register, most recent lodged 2026. Indicative of the district rather than a full census.
Prices changed +1.8% over the last year in Conwy.
Edeirnion · Efenechdyd · Llandderfel · Llanfair Dyffryn Clwyd Gwyddelwern · Uwch Aled
Common questions about LL21
What is the average house price in LL21?
The UK House Price Index puts the average home in Conwy at £213,240 as of 2026-05. Recent Land Registry sales recorded inside the LL21 district have a median price of £240,000.
How much does each property type cost in LL21?
Detached £315,690, semi-detached £219,473, terraced £170,778, flats £125,399, based on the UK House Price Index for Conwy.
What EPC rating do homes in LL21 usually have?
Band D is the most common rating in our sample of 98 certificates from LL21, with 89.8% of homes rated below band C. A full property report shows the exact certificate, running costs and recommended improvements for one address.
What are the schools like near LL21?
0 schools within a mile of the LL21 district centre are rated Good or Outstanding by Ofsted. Catchment areas are set by the local authority and can change year to year.
Where does this LL21 data come from?
HM Land Registry Price Paid Data and the UK House Price Index for prices, the government's energy performance register for EPC bands, data.police.uk for crime, Get Information About Schools and Ofsted for schools, and ONS postcode geography. All are published under the Open Government Licence v3.0.
A full report covers the energy certificate, sale history and valuation, council tax band and bill, flood and crime risk, schools, transport and neighbourhood data for a single property.
Search an addressMore on LL21
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Sources: HM Land Registry Price Paid Data and UK House Price Index, ONS postcode geography, data.police.uk, Get Information About Schools and Ofsted. Contains public sector information licensed under the Open Government Licence v3.0.