LL37 postcode area guide — Gwynedd
House prices, crime, broadband speeds, mobile signal, schools and demographics for the LL37 postcode district in Gwynedd — every official dataset on one page.
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Where is LL37?
Broadband & internet speeds in LL37
Good coverage
Superfast (30Mb+)
91.7%
Ultrafast (300Mb+)
7.9%
Gigabit-capable
7.9%
Below USO (10Mb)
0%
Broadband availability in the LL37 postcode district (Gwynedd) is Good — superfast broadband reaches most premises. Across the 40 postcodes Ofcom measures in LL37, superfast broadband (30 Mbit/s or faster) reaches 91.7% of premises and gigabit-capable lines are available to 7.9%.
Around 0% of premises in LL37 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 LL37
| Postcode | Superfast | Gigabit |
|---|---|---|
| LL37 2JA | 100% | 0% |
| LL37 2JB | 100% | 0% |
| LL37 2JD | 97.1% | 0% |
| LL37 2JE | 100% | 0% |
| LL37 2JF | 100% | 0% |
| LL37 2JG | 100% | 0% |
| LL37 2JH | 100% | 0% |
| LL37 2JJ | 100% | 0% |
| LL37 2JL | 100% | 0% |
| LL37 2JP | 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 LL37
Police recorded 3 incidents within about a mile of the centre of LL37 in May 2026 (latest published street-level data). The breakdown:
| Category | Incidents | Share |
|---|---|---|
| Anti-social behaviour | 2 | 66.7% |
| Violence & sexual offences | 1 | 33.3% |
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 LL37
Based on 8 sales registered with HM Land Registry in the last 12 months, the median sold price in LL37 is £280,000, up 67.2% on the previous year (£167,500).
Detached
£333,100
5 sales
Latest recorded sales in LL37
| Date | Price | Type | Street | Postcode |
|---|---|---|---|---|
| 14 Apr 2026 | £565,000 | Detached | Gwastadgoed Isaf | LL37 2LA |
| 13 Feb 2026 | £365,000 | Detached | LL37 2UZ | |
| 23 Jan 2026 | £320,000 | Detached | Station Road | LL37 2JS |
| 23 Jan 2026 | £245,000 | Terraced | LL37 2YJ | |
| 3 Dec 2025 | £333,100 | Detached | LL37 2JD | |
| 11 Sep 2025 | £153,000 | Semi-detached | LL37 2YJ | |
| 22 Aug 2025 | £280,000 | Detached | LL37 2JD | |
| 11 Jul 2025 | £110,000 | Terraced | LL37 2UZ | |
| 30 Jun 2025 | £158,700 | Detached | LL37 2JU | |
| 10 Mar 2025 | £330,000 | Detached | LL37 2JG |
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 LL37
| School | Phase | Ages | Pupils | Postcode |
|---|---|---|---|---|
| Ysgol y Traeth | Not applicable | — | — | LL42 1HH |
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 LL37
6 rated food businesses operate in LL37. 4 hold the top rating of 5, 1 are rated 4, and none are currently rated 2 or below.
Among the 5-rated: Hendre Hall Coffee Shop | Bar, Maiden Art And Interiors, Siop Llwyngwril, Sunbeach Shop.
Source: Food Standards Agency, food hygiene ratings (FHRS) open data.
Energy performance (EPC) in LL37
From a sample of 73 Energy Performance Certificates across 10 LL37 postcodes, the most common rating is band E (average band E). 21% of sampled homes are rated C or better.
Band A
3%
Band B
4%
Band C
14%
Band D
25%
Band E
30%
Band F
15%
Band G
10%
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 LL37 typically use:
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What's it like living in LL37?
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Moving to LL37? Sort your connectivity first
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Postcodes in LL37
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.