LL55 postcode district: Caernarfon and around, Gwynedd
LL55 is a postcode district in Wales, with 741 postcodes in use in 5 sectors. It has postcodes in Caernarfon, Llanberis and Llanrug. Its council is Gwynedd.
Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. See all our data sources
Every postcode in LL55, and which are new since 2020
- New since 2020: 17
- In use before 2020: 724
Of the 741 postcodes in LL55 that ONS places, 17 are new since 2020 and 724 were in use before 2020.
Each mark is a postcode's centre point as ONS gives it, not a building. Press one to see its postcode and open its page. New since 2020 means it came into use in January 2020 or later. No boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode.
The middle of its postcodes: latitude 53.1341, longitude -4.2040. Open this area on OpenStreetMap
Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; when each came into use: the same directory; roads, rivers and built-up areas: Contains OS data © Crown copyright and database right 2026. Drawn by us. Street map: Ordnance Survey, OS Open Zoomstack, Open Government Licence v3.0, drawn with MapLibre. How we use them
What broadband can you get in LL55?
Ofcom reports on 727 of the 741 postcodes in LL55. At 426 of them every home and business can get gigabit broadband, and at 17 some cannot get decent broadband (10 Mbit/s).
Ofcom gives each postcode's share of homes and businesses, not how many there are, so these count postcodes. Each postcode page has its own figures. A provider's checker answers for one address.
Check one address on Ofcom's checkerSource: Ofcom, Connected Nations, Spring 2026, data for January 2026, Open Government Licence v3.0. How we use it
What do homes sell for in LL55?
Homes in LL55 sold for a typical £210,000 in the 12 months to August 2026, across 193 sales, up 2.4% on the 12 months before, HM Land Registry's figures show.
- Detached £330,000 49 sales
- Semi-detached £223,250 58 sales
- Terraced £162,000 85 sales
- Flat or maisonette 1 sale, too few to price
Each bar is that kind's typical price, against the most expensive kind here.
Standard sales of homes at market value. A typical price is the median, the middle sale. Sales take weeks to be registered, so the last month or two are incomplete. Each postcode page gives the figure for its own postcode sector.
Source: HM Land Registry Price Paid Data, files dated 28 September 2026. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0. How we use it
Postcodes in LL55
Pick a sector, then a postcode. A sector is the district plus the next digit.
UK postcode format explainedPlaces in LL55
Towns and villages with postcodes in LL55, and how many each has here.
Who covers LL55
How many of the district's postcodes in use fall under each council, constituency and police force area.
Councils
- Gwynedd741
Constituencies
- Dwyfor Meirionnydd741
Police force areas
- North Wales741
Next to LL55
"Next to" is by number: the districts before and after LL55 in the LL area.
Check a postcode
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