LL40 area guide
House prices, recent sales, crime and schools for the LL40 postcode district in Gwynedd. Free to read, from official open data. For one address in detail, run a full property report.
Gwynedd · 2026-05 (UK HPI)
Median £193,250
Street-level crime at the district centre
Ofsted rated, within one mile
What the data says about LL40
The average home across Gwynedd is worth about £203,619 (UK House Price Index, 2026-05), and the median of the 10 most recent Land Registry sales recorded inside LL40 is £193,250, and prices have risen 2.5% over the last year.
Of 69 energy certificates sampled across 12 postcodes in LL40, band C is the most common, and 56.5% of homes sit below band C — the point at which most lenders' green mortgage deals and future rental rules bite.
Police recorded 13 crimes around the centre of LL40 in the six months to 2026-06, most often other theft (3).
There are 0 schools rated Good or Outstanding by Ofsted within a mile of LL40 in Gwynedd.
The district covers the Arthog a Llangelynnin, Brithdir and Llanfachreth/Ganllwyd/Llanelltyd, De Dolgellau, Gogledd Dolgellau ward areas.
Sample of 69 energy certificates from 12 postcodes in LL40, taken from the government energy performance register, most recent lodged 2026. Indicative of the district rather than a full census.
Prices changed +2.5% over the last year in Gwynedd.
Street-level crime from data.police.uk, six months to 2026-06.
Arthog a Llangelynnin · Brithdir and Llanfachreth/Ganllwyd/Llanelltyd · De Dolgellau · Gogledd Dolgellau · Llanuwchllyn · Trawsfynydd
Common questions about LL40
What is the average house price in LL40?
The UK House Price Index puts the average home in Gwynedd at £203,619 as of 2026-05. Recent Land Registry sales recorded inside the LL40 district have a median price of £193,250.
How much does each property type cost in LL40?
Detached £315,747, semi-detached £209,692, terraced £160,432, flats £114,979, based on the UK House Price Index for Gwynedd.
Is LL40 a safe area?
Police recorded 13 crimes near the centre of LL40 in the six months to 2026-06. The most common category was other theft with 3 reports. Crime is recorded at street level, so figures vary street to street within the same district.
What EPC rating do homes in LL40 usually have?
Band C is the most common rating in our sample of 69 certificates from LL40, with 56.5% 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 LL40?
0 schools within a mile of the LL40 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 LL40 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.
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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.