21 Rhyd Y Penau Road Cyncoed Cardiff CF23 6PX Data via plota.co.uk

26/01457/HSE - Householder Planning Permission Approved

Proposal

Ground floor rear extension and alteration to loft, rear and side dormers and alterations to garage to form guest room, involving taking down front boundary wall. Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
14 Jul 2026
✓
Consultation
10 Aug 2026
✓
Approved
27 Aug 2026

Approved on 27 Aug 2026 · Last checked 27 Aug 2026

Site constraints 2

Local nature reserve 152 m away: Nant Fawr Corridor
Work nearby can need a habitats assessment.
Harm to a protected site is only accepted where there is no alternative and an overriding public interest.
Also on the record
Radon affected area, class 3.
Not affected
Outside flood zones 2 and 3 · No listed building at the site · No scheduled monument at the site

Checked on 6 October 2026. Historic England, the Environment Agency, Natural England, the British Geological Survey and UK Health Security Agency (radon, contains BGS materials © UKRI) and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.

Building

Floor area93 m² (1,001 sq ft)
Energy ratingD (61 out of 100), could reach C
PropertySemi-detached house, 5 habitable rooms
Built1950 to 1966
HeatingBoiler and radiators, mains gas
WallsSandstone, as built, no insulation (assumed)

From the energy performance certificate lodged in August 2026, the latest held for this property. The building may have changed since. View the certificate

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Important details

Council
Cardiff
Application type
Householder Planning Permission
Postcode
CF23 6PX
Received
14 Jul 2026
Validated
14 Jul 2026
Ward
CYNCOED
Case officer
Show
Decision
Permission Granted
Decision date
27 Aug 2026
Applicant
Show
Agent
KnK Design Studio Ltd

How this decision compares

Decided in 44 days from validation, 10 days faster than Cardiff's median of 54 for demolitions. Approved, as 96% of demolitions here are.

57%decided within 8 weeks
96%approved
93decided in the last year

Plota live figures for demolitions decided by Cardiff in the last twelve months, from validation. Cardiff decision record →

Public comments

No public comments yet.

5 neighbours consulted · Last counted 27 Aug 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15080366
Planning Portal ref
PP-15080366
Neighbours
11 Aug 2026
Consultation
10 Aug 2026
Comments by
25 Aug 2026
Env. assessment
No

Freehold boundary: © Crown copyright and database rights 2026, HM Land Registry. Polygons © Crown copyright and database rights 2026 Ordnance Survey 100026316. Conditions of use

Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.