20 Knowbury Avenue, Penarth Data via plota.co.uk
Proposal
New front porch with balcony over, new rear dormer to first floor, internal remodelling. All finishes to match existing Data via plota.co.uk
Application progress
Under consideration
No decision has been issued yet. Plota predicts a decision between 12 Oct 2026 and 21 Oct 2026, from Glamorgan's recent extensions.
Documents 10
Statements & assessments 1
Plans & drawings 5
Consultation & comments 2
Site constraints 3
Checked on 6 October 2026. The pin for this application is the centre of its postcode rather than the building, so distances to nearby designations are measured from the postcode and can be out by the width of the postcode area. 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 £680,000 in February 2021. Detached house, freehold.
Sale prices from HM Land Registry's price paid record, matched to this application by its address.
Building
From the energy performance certificate lodged in November 2019, the latest held for this property, matched to this application by its address. The building may have changed since. View the certificate
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Important details
Decision outlook
Day 51 of the 56-day target. Glamorgan usually decides extensions by day 56.
Plota live figures for extensions decided by Glamorgan in the last twelve months, from validation. Glamorgan decision record →
Consultation & key dates
- Comments by
- 14 Sept 2026
Historical activity at this location
25 nearby applications on record - archival context, not part of the live application.
Nearby activity
Sale prices: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.
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.
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20 Knowbury Avenue, Penarth
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The consultation period closed on 14 Sept 2026.