LL21 9EB Denbighshire

Streets

• Unnamed street, Gwyddelwern: 6 addresses
• Unnamed street, Llanelidan: 3 addresses
• Unnamed street, Bryn Saith Marchog: 3 addresses
• Unnamed street, Bryn Saith Marchog: 2 addresses
• Unnamed street, Bryn Saith Marchog: 1 address

Council tax

What each band costs in Denbighshire in 2026-27: Band D £2,339 a year on average, including the police and community council charges.

Homes by band in the neighbourhood around this postcode: most are in band F (21% of about 1,150 homes).

Sources: Valuation Office Agency, Council Tax: stock of properties, homes at 31 March 2026 (counts rounded to the nearest 10), 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

Planning designations come from planning.data.gov.uk, which covers England only; Welsh conservation areas and listed buildings (Cadw) are not included yet.

Source: planning.data.gov.uk (Ministry of Housing, Communities and Local Government), compiled from councils and, for listed buildings, Historic England's National Heritage List. Conservation areas, Article 4 directions, tree preservation areas and the green belt are checked at each postcode's centre. Listed buildings and protected trees are counted within 100 m of this postcode. Councils publish Article 4 directions, tree preservation orders and brownfield registers to different standards, and some not yet. Planning applications are not here: there is no national open record of them yet.

Flood risk

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

For Wales only the planning flood zones are shown here; Natural Resources Wales's likelihood map (Flood Risk Assessment Wales) is not included yet.

Sources: Natural Resources Wales Flood Map for Planning: rivers and sea (loaded 29 October 2026). 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 100%, gigabit 100% of premises; 0% cannot get 10 Mbit/s. Ofcom Connected Nations, data as at January 2026.