CF64: Penarth, Dinas Powys and Sully

If you're looking at CF64, a postcode district in the Vale of Glamorgan, this page puts the official data in one place, from house prices and energy ratings to schools and crime.

Penarth, Dinas Powys, Sully and Morristown are among the places in CF64, which has around 15,600 homes in all. Sales are spread fairly evenly across terraced houses, semi-detached houses, detached houses and flats, each about a quarter of the total.

In the five years to August 2026, homes in CF64 sold for about £335,000 on average, up 22% on the five years before. Across the Vale of Glamorgan as a whole, homes sold for about £280,000 over the same five years, so prices here are higher. Most of CF64's postcodes are outside mapped flood risk areas.

All figures come from official sources, listed at the bottom of this page.

Of the homes sold in the five years to August 2026, 27% were terraced houses, 25% were semi-detached houses, 24% were detached houses and 23% were flats. 26% were leasehold and 6% were new builds (172 sales).

The latest EPC rating of each of the 15,604 homes on record, from the EPC register. Most are rated C and D, and 22% have no EPC on record.

• A1% (122)
• B11% (1,651)
• C28% (4,413)
• D28% (4,423)
• E8% (1,291)
• F1% (229)
• Gunder 1% (66)
• None22% (3,409)

14 state schools have a CF64 postcode, and 5 more are within a mile of one of its postcodes. Being near a school is not the same as being in its catchment: check admissions with the council.

Estyn, the inspectorate for schools in Wales, stopped giving schools an overall grade from spring 2022, so there is no single rating to show. Each school's inspection reports are on estyn.gov.wales.

We checked the centre of each of CF64's 923 postcodes against the flood risk maps from Natural Resources Wales. 882 sit outside every mapped area, and 41 are in one: 10 at high risk, 7 at medium risk and 24 at low risk. The centre of a postcode is not each home in it, so check an exact address on NRW's flood risk map.

• High risk from rivers: Greater than a 1 in 30 (3.3%) chance of flooding each year.
• Medium risk from rivers: Between a 1 in 100 (1%) and a 1 in 30 (3.3%) chance of flooding each year.
• Low risk from rivers or surface water and small watercourses: Between a 1 in 1,000 (0.1%) and a 1 in 100 (1%) chance of flooding each year.
• Low risk from the sea: Between a 1 in 1,000 (0.1%) and a 1 in 200 (0.5%) chance of flooding each year.

The sentence above counts each postcode once, at its highest risk. The table counts it under each source, so a postcode at risk from more than one source appears more than once.

NRW's map takes into account the effect of flood defences where it has information on them. Defences reduce the chance of flooding but do not completely stop it, as they can be overtopped or fail.

Contains Natural Resources Wales information © Natural Resources Wales and database right. All rights reserved. Some features of this information are based on digital spatial data licensed from the UK Centre for Ecology & Hydrology © UKCEH. Defra, Met Office and DARD Rivers Agency © Crown copyright. © Cranfield University. © James Hutton Institute. Contains OS data © Crown copyright and database right.

CF64 has 859 postcodes with homes, in 5 sectors. Search above by postcode or street, or open a sector below and choose a postcode to check a home there. Each postcode is shown with its main street.