Lilyvale Trem Y Coed St Fagans Cardiff CF5 6FH Data via plota.co.uk

26/01685/HSE - Householder Planning Permission Approved
Extensions & alterations

Proposal

Rear single storey and two storey extension Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
7 Aug 2026
✓
Consultation
10 Aug 2026
✓
Approved
22 Sept 2026

Approved on 22 Sept 2026 · Delegated to Group Leader · Last checked 22 Sept 2026

Documents 6

Decision & officer reports 1

PDF HOUSEHOLDER APPROVED Decision · 22 Sept 2026 View ↗

Statements & assessments 2

PDF GREEN INFRASTRUCTURE STATEMENT Supporting Documents · 7 Aug 2026 View ↗ PDF DESIGN AND ACCESS AND HERITAGE IMPACT STATEMENT Design and Access Statement · 7 Aug 2026 View ↗

Application forms 1

PDF APPLICATIONFORMREDACTED Application Form · 7 Aug 2026 View ↗

Consultation & comments 1

PDF PUBLIC COMMENT Public Comment · 17 Aug 2026 View ↗

Other documents 1

PDF OFFICER'S RECOMMENDATION Report · 22 Sept 2026 View ↗

All documents on the council site ↗

Site constraints 3

St. Fagans conservation area
Demolition needs planning permission and permitted development is restricted.
The council must give weight to preserving or enhancing the area's character and appearance. Not every council has published its boundaries as open data.
Radon affected area, class 5
An estimated 10 to 30% of homes reach the radon action level. Indicative for the 1 km square, which takes the highest class found in it; a radon test gives the answer for a building.
From the British Geological Survey and UK Health Security Agency indicative atlas. Under building regulations, as the BRE guide BR 211 (2023) sets out, new buildings and extensions need basic radon protection from class 3 in England and Wales and from class 2 in Scotland, and full protection from class 5. The class at the site itself, from the detailed BGS map, decides which.
UKHSA radon ↗
Also on the record
1 listed building within 150 m.
Not affected
Outside flood zones 2 and 3 · 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 area121 m² (1,302 sq ft)
Energy ratingB (84 out of 100), could reach A
PropertyDetached house
Built2016
HeatingBoiler and radiators, mains gas
WallsAverage thermal transmittance 0.19 W/m²K

From the energy performance certificate lodged in December 2016, the latest held for this property. The building may have changed since. View the certificate

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23 Sept 2026Pending

7 Penmark Road Ely Cardiff CF5 4RL

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26/02015/NMA
23 Jun 2026Refused

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Side extension with associated works.

26/01315/HSE

Important details

Council
Cardiff
Application type
Householder Planning Permission
Postcode
CF5 6FH
Received
7 Aug 2026
Validated
7 Aug 2026
Ward
PENTYRCH AND ST FAGANS
Case officer
Show
Decision
Permission Granted
Decision date
22 Sept 2026
Decision level
Delegated to Group Leader
Applicant
Show
Agent
James King Architects

How this decision compares

Decided in 46 days from validation, about the council's usual 49 days. Approved, as 94% of extensions here are.

68%decided within 8 weeks
94%approved
602decided in the last year

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

Public comments

1comment received
1 neutral

5 neighbours consulted · Last counted 22 Sept 2026

Read the comments on the council site ↗

Consultation & key dates

Alt. reference
PP-15085454
Planning Portal ref
PP-15085454
Neighbours
10 Aug 2026
Consultation
10 Aug 2026
Comments by
31 Aug 2026
Env. assessment
No

Historical activity at this location

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

Within ~100m

Nearby activity

2025
35 Trem Y Coed St Fagans Cardiff CF5 6FA
Two storey side extension with raising of ridge and dormer extension to provide an additi…
25/02547/HSE
2023 Approved
49 Trem Y Coed St Fagans Cardiff CF5 6FA
Tree Works to horse chestnut rear 49 Trem y Coed as per submitted James Pinder Treecare C…
23/01161/WTCA
2021 Approved
15 Trem Y Coed St Fagans Cardiff CF5 6FA
REAR DORMER ROOF EXTENSION
21/01827/DCH
2021 Refused
15 Trem Y Coed St Fagans Cardiff CF5 6FA
REAR DORMER ROOF EXTENSION
21/01229/DCH
2021 Refused
15 Trem Y Coed St Fagans Cardiff CF5 6FA
REAR DORMER ROOF EXTENSION
21/00986/DCH
2020 Approved
23 Trem Y Coed St Fagans Cardiff CF5 6FA
SINGLE STOREY REAR EXTENSION
20/00470/DCH
2018 Approved
31 Trem Y Coed St Fagans Cardiff CF5 6FA
PROPOSED DETACHED PLAY ROOM AND SUN ROOM
18/01794/DCH
2018 Approved
3 Court Cottages Michaelston Road St Fagans Cardiff CF5 6EN
SINGLE STOREY EXTENSION TO BEDROOM AT REAR OF DWELLING
18/00942/DCH
2017 Approved
Plot 21 Mulberry Grove Cardiff
PROPOSED ALTERATION OF APPROVED DWELLING TO INCLUDE REAR CONSERVATORY EXTENSION
17/01556/MNR

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.