9 Darleys Close Grendon Underwood Buckinghamshire HP18 0SE Data via plota.co.uk
Proposal
Householder application for the construction of a single storey rear extension (to replace existing conservatory), porch to front including new roof over existing bay window and ancillary building to front (to replace existing garage). Data via plota.co.uk
Application progress
Under consideration
No decision has been issued yet. Plota predicts a decision around 28 Oct 2026, from Buckinghamshire's recent extensions.
Documents 6
Statements & assessments 4
Application forms 1
Other documents 1
Site constraints 6
Checked on 6 October 2026. Historic England, the Environment Agency, Natural England 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 1
Last sold for £560,000 in April 2026. 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 July 2025, 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
- Full Application
- Postcode
- HP18 0SE
- Received
- 2 Sept 2026
- Validated
- 2 Sept 2026
- Ward
- Grendon Underwood and The Claydons
- Parish
- Grendon Underwood
- Case officer
- Show
- Target decision
- 28 Oct 2026
- Decision level
- Delegated Decision
- Applicant
- Show
- Agent
- Hexon Planning Consultants
Decision outlook
Day 37 of the 56-day target. Buckinghamshire usually decides extensions by day 56.
Plota live figures for extensions decided by Buckinghamshire in the last twelve months, from validation. Buckinghamshire decision record →
Public comments
No public comments yet.
5 neighbours consulted · Last counted 27 Sept 2026
Consultation & key dates
- Neighbours
- 7 Sept 2026
- Consultation
- 7 Sept 2026
- Comments by
- 28 Sept 2026
- Statutory expiry
- 28 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%).
Sale prices: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.
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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9 Darleys Close Grendon Underwood Buckinghamshire HP18 0SE
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The consultation period closed on 28 Sept 2026.