LL21 9SP Conwy

Streets

• Ffordd yr Alwen, Conwy - Conwy: 7 addresses
• Ffordd yr Alwen, Cerrigydrudion: 4 addresses
• B5105, Sir Ddinbych - Denbighshire: 2 addresses
• Unnamed street near Ffordd yr Alwen, Cerrigydrudion: 1 address
• A5, Telford: 1 address

Council tax

What each band costs in Conwy in 2026-27: Band D £2,473 a year on average, including the police and community council charges.

Homes by band in the neighbourhood around this postcode: most are in band D (26% of about 680 homes).

Sources: Valuation Office Agency, Council Tax: stock of properties, homes at 31 March 2026 (counts rounded to the nearest 10; some small counts withheld), for the neighbourhood (census area of about 700 homes) around it, not just this postcode; Welsh Government, council tax levels 2026-27. Bands are charged as fixed shares of Band D; the actual bill depends on the parish and on discounts such as the single-person discount. Check a home's own band with the official council tax band checker.

Planning and heritage

• Conservation area: yes, Cerrigydrudion. Extensions, demolition, some windows and doors, and work on trees need consent.
• Listed buildings within 100 m of this postcode: 6.
• Article 4 directions, tree preservation orders and green belt: Wales has no national record of these; the council's planning department holds them.

Listed buildings

• Cerrigydrudion War Memorial, grade II
• Church of St Mary Magdalene, grade II
• Hafan Prys Almshouses, grade II
• Morris Monument in the churchyard of the Church of St Mary Magdalene, grade II
• Pair of Williams Chest Tombs in the churchyard of the Church of St Mary Magdalene, grade II
• Table Tomb in the churchyard of the Church of St Mary Magdalene, grade II

Source: DataMapWales (Welsh Government): conservation areas compiled from the councils, and Cadw's listed buildings. Conservation areas are checked at each postcode's centre; some councils' boundaries in this layer have not been updated for years, so the council's own map is the one to rely on. Listed buildings are counted within 100 m of this postcode. Planning applications are not here: there is no national open record of them.

Flood risk

None of the 15 address points in this postcode is in an area at high, medium or low risk of flooding from rivers, the sea or surface water on Natural Resources Wales's map. Outside those areas the chance is under 0.1% (1 in 1,000) a year.

High: 3.3% (1 in 30) or more chance of flooding a year. Medium: 1% to 3.3%. Low: 0.1% to 1%. The map allows for flood defences. Address points are every property record (UPRN) in the postcode, each counted if it is in an area or within 5 m of one (the maps stop at building walls); a few are not homes, such as garages, business units or caravan pitches. Counts cover whole postcodes, which can include other streets.

Flood zone for planning: no postcode centre is in flood zone 2 or 3. Welsh zones include an allowance for climate change.

Sources: Natural Resources Wales Flood Risk Assessment Wales: rivers, sea and surface water (loaded 30 October 2026), and Flood Map for Planning: rivers and sea (loaded 29 October 2026); address points from OS Open UPRN and the ONS UPRN Directory. Flood zones are checked at each postcode's centre point. These are models of areas, which their publishers say are not suitable for showing whether an individual property is at risk, and they do not cover flooding from sewers or drains. Check an address on Natural Resources Wales's flood risk map.

Broadband

Superfast 100%, ultrafast 71%, gigabit 71% of premises; 0% cannot get 10 Mbit/s. Ofcom Connected Nations, data as at January 2026.