LL42 postcode area guide — Gwynedd
House prices, crime, broadband speeds, mobile signal, schools and demographics for the LL42 postcode district in Gwynedd — every official dataset on one page.
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Where is LL42?
Broadband & internet speeds in LL42
Strong coverage
Superfast (30Mb+)
96.8%
Ultrafast (300Mb+)
10.2%
Gigabit-capable
10.2%
Below USO (10Mb)
0.1%
Broadband availability in the LL42 postcode district (Gwynedd) is Strong — superfast is near-universal and gigabit is rolling out. Across the 151 postcodes Ofcom measures in LL42, superfast broadband (30 Mbit/s or faster) reaches 96.8% of premises and gigabit-capable lines are available to 10.2%.
Around 0.1% of premises in LL42 fall below the Universal Service Obligation (a minimum of 10 Mbit/s download and 1 Mbit/s upload), so the overwhelming majority of homes and businesses here can already order a decent fixed line. For a business that depends on its connection, the figures that matter most are gigabit and full-fibre availability — the symmetric, low-contention services we quote leased lines and FTTP against.
Sample postcodes in LL42
| Postcode | Superfast | Gigabit |
|---|---|---|
| LL42 1AB | 100% | 0% |
| LL42 1AD | 100% | 0% |
| LL42 1AE | 100% | 20% |
| LL42 1AF | 100% | 13% |
| LL42 1AG | 100% | 0% |
| LL42 1AJ | 95.5% | 40.9% |
| LL42 1AL | 0% | 0% |
| LL42 1AN | 100% | 14.3% |
| LL42 1AP | 100% | 0% |
| LL42 1AQ | 100% | 0% |
Run a speed test to see what you're actually getting, or check your exact postcode.
Mobile signal around Gwynedd
Ofcom's coverage model for the wider Gwynedd district (68,440 premises):
4G indoors — all networks
76.8%
4G outdoors — all networks
95.3%
5G outdoors — all networks
—
Voice indoors — all networks
81.4%
Signal varies street by street — use the mobile coverage checker to compare EE, O2, Three and Vodafone at an exact postcode.
Crime in LL42
Police recorded 29 incidents within about a mile of the centre of LL42 in May 2026 (latest published street-level data). The breakdown:
| Category | Incidents | Share |
|---|---|---|
| Violence & sexual offences | 9 | 31.0% |
| Anti-social behaviour | 6 | 20.7% |
| Drugs | 4 | 13.8% |
| Burglary | 3 | 10.3% |
| Criminal damage & arson | 2 | 6.9% |
| Public order | 2 | 6.9% |
| Theft from the person | 2 | 6.9% |
| Weapons possession | 1 | 3.4% |
Raw counts favour busy town centres — a high street with shops and nightlife records more incidents than a residential cul-de-sac. Source: police.uk open data (point sample around the district centroid).
House prices in LL42
Based on 37 sales registered with HM Land Registry in the last 12 months, the median sold price in LL42 is £205,000, up 13.9% on the previous year (£179,995).
Detached
£315,000
10 sales
Semi-detached
£189,995
7 sales
Terraced
£180,000
8 sales
Flat / maisonette
£129,950
10 sales
Latest recorded sales in LL42
| Date | Price | Type | Street | Postcode |
|---|---|---|---|---|
| 15 May 2026 | £80,000 | Semi-detached | Water Street | LL42 1AT |
| 6 May 2026 | £305,000 | Detached | Ffordd Llwyn Mynach | LL42 1PA |
| 23 Apr 2026 | £189,995 | Semi-detached | Alley Fach | LL42 1PG |
| 22 Apr 2026 | £129,950 | Flat | St Johns Hill | LL42 1AF |
| 17 Apr 2026 | £196,500 | Flat | Porkington Terrace | LL42 1LX |
| 1 Apr 2026 | £200,000 | Terraced | Aelfor Terrace | LL42 1PD |
| 31 Mar 2026 | £95,000 | Terraced | Heol Y Llan | LL42 1LD |
| 26 Mar 2026 | £770,000 | Other | LL42 1TG | |
| 13 Mar 2026 | £205,000 | Semi-detached | Marine Road | LL42 1NS |
| 3 Mar 2026 | £135,000 | Flat | Marine Parade | LL42 1NB |
Contains HM Land Registry data © Crown copyright and database right 2026, licensed under the Open Government Licence v3.0.
Who lives here? Gwynedd demographics
Census 2021 figures for the wider Gwynedd district (117,393 residents, 51,105 households):
| Age profile | |
|---|---|
| Under 15 | 16.6% |
| 15–29 | 23.3% |
| 30–44 | 15.9% |
| 45–64 | 21% |
| 65+ | 23.2% |
| Housing tenure | |
|---|---|
| Owner-occupied | 65.4% |
| Private rented | 17.6% |
| Social rented | 9.9% |
Source: ONS Census 2021 (district level — the finest openly licensed cut we republish). © Crown copyright, OGL v3.0.
Schools in and around LL42
| School | Phase | Ages | Pupils | Postcode |
|---|---|---|---|---|
| Ysgol y Traeth | Not applicable | — | — | LL42 1HH |
| Ysgol Gynradd Dyffryn Ardudwy | Not applicable | — | — | LL44 2EP |
Source: DfE Get Information about Schools (England & Wales). Check Ofsted report cards for inspection detail — headline one-word grades were retired in 2024.
Food hygiene ratings in LL42
90 rated food businesses operate in LL42. 71 hold the top rating of 5, 7 are rated 4, and 2 are rated 2 or below.
Among the 5-rated: Aber House, Alfredo's, Antonia'S Ice Cream & Coffee Shop, Barmouth Foodbank, Barmouth Hotel.
Source: Food Standards Agency, food hygiene ratings (FHRS) open data.
Energy performance (EPC) in LL42
From a sample of 89 Energy Performance Certificates across 10 LL42 postcodes, the most common rating is band D (average band D). 27% of sampled homes are rated C or better.
Band C
27%
Band D
28%
Band E
20%
Band F
18%
Band G
7%
Source: MHCLG Energy Performance of Buildings Data (England & Wales), sampled at postcode level and refreshed monthly. Individual certificates are on each postcode’s page.
Phone area codes for Gwynedd
Landlines around LL42 typically use:
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What's it like living in LL42?
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Moving to LL42? Sort your connectivity first
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Postcodes in LL42
Neighbouring districts
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Frequently asked questions
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Sources: HM Land Registry Price Paid Data, police.uk street-level crime, Ofcom Connected Nations, ONS Census 2021, DfE Get Information about Schools, Food Standards Agency FHRS — all © Crown copyright, licensed under the Open Government Licence v3.0. Figures are area aggregates; individual addresses vary. Energy performance (EPC) data will be added when our Open Data Communities registration is approved.