Planning application
16 Owlscastle Close Horsham West Sussex RH12 5YA
Works: Extension Small domestic
Read from the description, not a valuation. How we read the register
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
Replacement of existing conservatory with new single storey rear extension and internal alterations to existing ground floor layout (Lawful Development Certificate - Proposed).
As published by the council, reference DC/25/1600
Application record
- Reference
- DC/25/1600
- Type
- Certificate Proposed Lawful Use/Dev
- Status
- Decided
- Decision
- Granted As published: Application Permitted
- Received
- 7 Oct 2025
- Validated
- 7 Oct 2025
- Decided
- 2 Dec 2025
- Ward
- Holbrook West
- Parish
- North Horsham PC
- Decision by
- Delegated Decision
- Postcode
- RH12 5YA
Timeline
Dates from the published record
-
7 Oct 2025
Received by Horsham
-
2 Dec 2025
Decision issued: Application Permitted
-
12 Aug 2026
Added to PlanIndex
Who's behind it
Company information only, from the register and Companies House
Claire Haigh Associates Ltd Agent, registered in East Sussex
Active · incorporated 2006 · East Sussex
38 applications on PlanIndex · across 6 councils · 91% granted
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See their track recordDocuments
Plans, drawings, consultee responses and the officer's report
13 documents on file for this application
A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.
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Open the documentsWhat this grant of permission means
Horsham granted permission on 2 December 2025, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.
About lawful development applications
A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.
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In Horsham
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DC/26/1319 Granted
Little Meadow Kerves Lane Horsham West Sussex RH13 6ES
Erection of outbuilding for use as a garage/gym and workshop. (Lawful Development Certificate - Proposed).
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DC/26/1310 Granted
143 Rushams Road Horsham West Sussex RH12 2NY
Loft conversion with hip to gable roof extension and rear dormer. Replacement of rear doors with bi-fold doors. (Lawful Development Certificate - Proposed).
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DC/26/1172 Granted
30 Laines Road Steyning West Sussex BN44 3LL
Conversion of garage into habitable living space, with the installation of 2no. windows to the front elevation, 1no. french doors to the rear elevation, and 2no. rooflights (Lawful Development Certificate - Proposed).
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DC/26/1544 Awaiting decision
17 Thornden Cowfold West Sussex RH13 8AG
Siting of single storey mobile home for ancillary use to the main dwelling (Lawful Development Certificate - Proposed).
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DC/26/1524 Awaiting decision
Rowan Two Mile Ash Horsham West Sussex RH13 0LA
Application to confirm the continuous use of the land Garden at Rowan purposes for a period in excess of ten years (Lawful Development Certificate - Existing)