13 Blackthorn Avenue Billingshurst West Sussex RH14 9GW

1. 3 Sep 2026

   Received by Horsham

2. 22 Sep 2026

   Validated

   Checked as complete and ready for consideration.

3. 28 Sep 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 17 November 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Horsham took a median of 56 days over the applications it decided in the last year.

This application is with Horsham for determination, against a statutory target of eight weeks. Over the last year Horsham decided lawful development applications in a median of 63 days. More in our guide to how long planning decisions take.

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.

• 14 Owl Close Billingshurst West Sussex RH14 9XJ

  DC/26/1109 Submitted 13 Jul 2026 50 yards away

  Erection of post and rail fencing with a maximum height of one metre to front elevation (Lawful Development Certificate - Proposed).

  Granted Lawful development 7 docs

• Rosier and Daux Wood Marringdean Road Billingshurst West Sussex

  DC/25/1997 Submitted 3 Dec 2025 200 yards away

  98% historically approved · decision due ~28 Jan

  Surgery to 1 x Oak.

  Awaiting decision Trees 5 docs

• 14 Owl Close Billingshurst West Sussex RH14 9XJ

  DC/26/0192 Submitted 3 Feb 2026 250 yards away

  81% historically approved · decision due ~31 Mar

  Erection of a first floor side extension over existing garage, and installation of an additional parking bay.

  Decided Full applications Extension 19 docs

• 11 Longhurst Drive Billingshurst West Sussex RH14 9XP

  DC/25/1855 Submitted 13 Nov 2025 250 yards away

  Erection of a first floor extension over existing garage and single storey side extension.

  Granted Householder Extension 15 docs
  Small domestic

• Mulberry House Marringdean Road Billingshurst West Sussex RH14 9HE

  DC/26/1451 Submitted 8 Sep 2026 250 yards away

  98% historically approved · decision due ~3 Nov

  Surgery to 83 x Poplar Trees

  Awaiting decision Trees 3 docs

• 10-17 and 22-31 (Inclusive) Wood Croft Marringdean Road Billingshurst West Sussex RH14 9XL

  S106/20/0004 Submitted 19 Feb 2020 300 yards away

  Amendment to legal agreement (ref: DC/13/0147) in relation to mortgagee in possession clauses

  Granted Conditions 7 docs

• 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).

  Received 5 Aug, published by the council 23 Aug 2026 Lawful development
• 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).

  Received 3 Aug, published by the council 23 Aug 2026 Lawful development
• 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).

  Received 21 Jul, published by the council 16 Aug 2026 Lawful development
• 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).

  Received 28 Sep, published by the council 12 Oct 2026 Lawful development
• 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)

  Received 23 Sep, published by the council 12 Oct 2026 Lawful development