23 Holyrood Avenue, Harrow, HA2 8UD Data via plota.co.uk
Proposal
Certificate of Lawful Proposed Development: Alterations to roof to create end gable and rear dormer with Juliette balcony; Two roof lights in front roof slope and window in gable end; Single storey detached outbuilding to rear for use as Gym/Storage Data via plota.co.uk
Application progress
Under consideration
No decision has been issued yet. Plota predicts a decision around 25 Dec 2026, from Harrow's recent extensions.
Documents 7
Plans & drawings 3
Application forms 3
Other documents 1
Site constraints 4
Checked on 2 November 2026. Historic England, the Environment Agency, Natural England, Transport for London (public transport access levels, Powered by TfL Open Data, OGL v3.0, contains OS data © Crown copyright and database right 2025) 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
From the energy performance certificate lodged in February 2018, the latest held for this property, matched to this application by its address. The building may have changed since. View the certificate
Every application in Harrow - and every UK council - as a live feed, an API, or a bulk CSV export.
Other new applications on this street
Nearby new applications
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Important details
Decision outlook
Day 12 of the 56-day target. Harrow usually decides extensions by day 56.
Plota live figures for extensions decided by Harrow in the last twelve months, from validation. Harrow decision record →
Consultation & key dates
- Statutory expiry
- 25 Dec 2026
Historical activity at this location
25 nearby applications on record - archival context, not part of the live application.
Nearby activity
Harrow ranks #115 out of 296 councils for householder decision speed. Harrow is also one of the strictest councils - it refuses more householder applications than almost any other, with only 83% approved vs 90% nationally.
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.
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23 Holyrood Avenue, Harrow, HA2 8UD
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