25 De Clare Drive Radyr Cardiff CF15 8HA Data via plota.co.uk

26/01703/CLPUD - Cert of Lawfulness Proposed (s192) Approved

Proposal

Dormer loft conversion to rear Data via plota.co.uk

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View original council record ↗Last checked 8 Oct 2026, 01:20

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Application progress

✓

Received

10 Aug 2026

✓

Approved

9 Sept 2026

Approved on 9 Sept 2026 · Delegated to Group Leader · Last checked 10 Sept 2026

Documents 5

Site constraints 3

Agricultural land, grade 3b

Not best and most versatile land (grades 1, 2 and 3a). Source: the Predictive Agricultural Land Classification Map (Defra and Natural England, 2025; the Welsh Government's Predictive ALC Map 2 in Wales), a model rather than a site survey. A site survey can differ.

Where development of farmland is needed, policy prefers poorer land over the best and most versatile (grades 1, 2 and 3a). Three sources: Natural England's post-1988 field surveys, which are definitive where they exist; the Defra predictive map for England (2025) and the Welsh Government predictive map, modelled from the soil map with 3a and 3b split; and the 1970s provisional map, which planners and other services still show, coarser and with grade 3 undivided. Where the provisional and predicted grades disagree, treat the predicted grade as the current estimate and expect an application to carry its own survey.

Local nature reserve 108 m away: Hermit Wood

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.

Sales history 2

Last sold for £486,000 in December 2015. Detached house, freehold.

11 December 2015£486,000

25 January 2013£432,000New build

Sale prices from HM Land Registry's price paid record, matched to this application by its address.

Building

Floor area186 m² (2,002 sq ft)

Energy ratingB (81 out of 100)

PropertyDetached house

Built2010

HeatingBoiler and radiators, mains gas

WallsAverage thermal transmittance 0.32 W/m?K

From the energy performance certificate lodged in April 2011, 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: Cert of Lawfulness Proposed (s192)
Postcode: CF15 8HA
Received: 10 Aug 2026
Validated: 10 Aug 2026
Ward: RADYR AND MORGANSTOWN
Case officer: Show
Decision: Permission Granted
Decision date: 9 Sept 2026
Decision level: Delegated to Group Leader
Applicant: Show

How this decision compares

Decided in 30 days from validation, 19 days faster than Cardiff's median of 49 for extensions. Approved, as 94% of extensions here are.

This one30d

Council49d

UK55d

69%decided within 8 weeks

94%approved

574decided in the last year

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

Public comments

No public comments yet.

Last counted 10 Sept 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference: PP-15148447
Planning Portal ref: PP-15148447
Env. assessment: No

Historical activity at this location

3 nearby applications on record - archival context, not part of the live application.

Within ~100m

Nearby activity

2022 Approved

7 De Clare Drive Radyr Cardiff CF15 8HA

REAR SINGLE STOREY EXTENSION AND PART CONVERSION OF GARAGE TO GARDEN ROOM

22/00866/DCH 21 Jun 2022

2016 Approved

58 Arudur Hen Radyr Cardiff CF15 8FX

SINGLE STOREY REAR AND SIDE EXTENSION

16/02968/DCH 1 Feb 2017

2016 Approved

35 DE CLARE DRIVE, RADYR, CARDIFF, CF15 8HA

PROPOSED SINGLE STOREY ORANGERY MEASURING 6.6M X 4.0M TO REAR OF PROPERTY

16/00679/DCH 8 Jun 2016

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.