18 Rowan Avenue High Wycombe Buckinghamshire HP13 6JA Data via plota.co.uk
Proposal
Certificate of lawfulness for proposed internal and external alterations to the existing outbuilding, including the formation of a stud partition to create an additional sleeping room, replacement of the existing garage door with a window, provision of a bathroom and installation of a small kitchen/washing unit. The outbuilding will remain ancillary to and accessed through the main dwelling and will not form a separate dwelling. Data via plota.co.uk
Application progress
Refused on 16 Oct 2026 · Delegated Decision · Last checked 16 Oct 2026
Documents 3
Decision & officer reports 2
Application forms 1
Site constraints 2
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
From the energy performance certificate lodged in August 2010, the latest held for this property. The building may have changed since. View the certificate
Every application in Buckinghamshire - and every UK council - as a live feed, an API, or a bulk CSV export.
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Important details
- Council
- Buckinghamshire
- Application type
- Certificate of Lawful Use - Proposed
- Postcode
- HP13 6JA
- Received
- 3 Sept 2026
- Validated
- 3 Sept 2026
- Ward
- Totteridge and Bowerdean
- Parish
- High Wycombe Unparished Area
- Case officer
- Show
- Target decision
- 29 Oct 2026
- Decision
- Cert of Law PROPOSED-refused
- Decision date
- 16 Oct 2026
- Decision level
- Delegated Decision
- Applicant
- Show
How this decision compares
Decided in 43 days from validation, 13 days faster than Buckinghamshire's median of 56 for extensions. Refused, as 17% of extensions here are.
Plota live figures for extensions decided by Buckinghamshire in the last twelve months, from validation. Buckinghamshire decision record →
Public comments
No public comments yet.
Last counted 16 Oct 2026
Consultation & key dates
- Statutory expiry
- 29 Oct 2026
- Env. assessment
- No
Buckinghamshire is one of the slowest councils in England for householder decisions, ranking #280 out of 296. 55% of applications have the time limit extended, above the 41% national average. Householder applications are slightly less likely to be approved here (86%) than the national average (90%).
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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18 Rowan Avenue High Wycombe Buckinghamshire HP13 6JA
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